1 | #!/usr/bin/env python |
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2 | |
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3 | |
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4 | import unittest |
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5 | from Numeric import zeros, array, allclose |
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6 | from math import sqrt, pi |
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7 | |
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8 | from util import * |
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9 | from config import epsilon |
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10 | from data_manager import timefile2netcdf |
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11 | |
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12 | |
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13 | def test_function(x, y): |
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14 | return x+y |
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15 | |
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16 | class Test_Util(unittest.TestCase): |
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17 | def setUp(self): |
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18 | pass |
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19 | |
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20 | def tearDown(self): |
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21 | pass |
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22 | |
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23 | |
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24 | def test_gradient(self): |
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25 | x0 = 0.0; y0 = 0.0; z0 = 0.0 |
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26 | x1 = 1.0; y1 = 0.0; z1 = -1.0 |
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27 | x2 = 0.0; y2 = 1.0; z2 = 0.0 |
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28 | |
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29 | zx, zy = gradient(x0, y0, x1, y1, x2, y2, z0, z1, z2) |
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30 | |
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31 | assert zx == -1.0 |
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32 | assert zy == 0.0 |
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33 | |
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34 | def test_gradient_more(self): |
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35 | x0 = 2.0/3; y0 = 2.0/3 |
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36 | x1= 8.0/3; y1 = 2.0/3 |
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37 | x2 = 2.0/3; y2 = 8.0/3 |
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38 | |
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39 | q0 = 2.0+2.0/3 |
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40 | q1 = 8.0+2.0/3 |
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41 | q2 = 2.0+8.0/3 |
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42 | |
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43 | #Gradient of fitted pwl surface |
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44 | a, b = gradient(x0, y0, x1, y1, x2, y2, q0, q1, q2) |
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45 | |
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46 | assert abs(a - 3.0) < epsilon |
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47 | assert abs(b - 1.0) < epsilon |
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48 | |
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49 | |
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50 | def test_gradient2(self): |
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51 | """Test two-point gradient |
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52 | """ |
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53 | |
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54 | x0 = 5.0; y0 = 5.0; z0 = 10.0 |
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55 | x1 = 8.0; y1 = 2.0; z1 = 1.0 |
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56 | x2 = 8.0; y2 = 8.0; z2 = 10.0 |
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57 | |
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58 | #Reference |
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59 | zx, zy = gradient(x0, y0, x1, y1, x2, y2, z0, z1, z2) |
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60 | a, b = gradient2(x0, y0, x1, y1, z0, z1) |
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61 | |
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62 | assert zx == a |
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63 | assert zy == b |
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64 | |
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65 | z2_computed = z0 + a*(x2-x0) + b*(y2-y0) |
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66 | assert z2_computed == z2 |
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67 | |
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68 | def test_gradient2_more(self): |
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69 | """Test two-point gradient more |
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70 | """ |
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71 | x0 = 2.0; y0 = 2.0 |
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72 | x1 = 8.0; y1 = 3.0 |
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73 | x2 = 1.0; y2 = 8.0 |
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74 | |
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75 | q0 = 2.0 |
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76 | q1 = 8.0 |
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77 | q2 = q0 |
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78 | |
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79 | #Gradient of fitted pwl surface |
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80 | a_ref, b_ref = gradient(x0, y0, x1, y1, x2, y2, q0, q1, q2) |
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81 | a, b = gradient2(x0, y0, x1, y1, q0, q1) |
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82 | |
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83 | assert a == a_ref |
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84 | assert b == b_ref |
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85 | |
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86 | |
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87 | def test_that_C_extension_compiles(self): |
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88 | FN = 'util_ext.c' |
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89 | try: |
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90 | import util_ext |
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91 | except: |
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92 | from compile import compile |
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93 | |
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94 | try: |
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95 | compile(FN) |
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96 | except: |
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97 | raise 'Could not compile %s' %FN |
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98 | else: |
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99 | import util_ext |
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100 | |
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101 | |
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102 | def test_gradient_C_extension(self): |
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103 | from util_ext import gradient as gradient_c |
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104 | |
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105 | x0 = 2.0/3; y0 = 2.0/3 |
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106 | x1= 8.0/3; y1 = 2.0/3 |
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107 | x2 = 2.0/3; y2 = 8.0/3 |
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108 | |
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109 | q0 = 2.0+2.0/3 |
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110 | q1 = 8.0+2.0/3 |
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111 | q2 = 2.0+8.0/3 |
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112 | |
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113 | #Gradient of fitted pwl surface |
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114 | a, b = gradient_c(x0, y0, x1, y1, x2, y2, q0, q1, q2) |
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115 | |
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116 | assert abs(a - 3.0) < epsilon |
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117 | assert abs(b - 1.0) < epsilon |
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118 | |
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119 | |
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120 | def test_gradient_C_extension3(self): |
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121 | from util_ext import gradient as gradient_c |
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122 | |
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123 | from RandomArray import uniform, seed |
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124 | seed(17, 53) |
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125 | |
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126 | x0, x1, x2, y0, y1, y2 = uniform(0.0,3.0,6) |
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127 | |
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128 | q0 = uniform(0.0, 10.0, 4) |
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129 | q1 = uniform(1.0, 3.0, 4) |
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130 | q2 = uniform(7.0, 20.0, 4) |
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131 | |
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132 | |
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133 | for i in range(4): |
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134 | #Gradient of fitted pwl surface |
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135 | from util import gradient_python |
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136 | a_ref, b_ref = gradient(x0, y0, x1, y1, x2, y2, |
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137 | q0[i], q1[i], q2[i]) |
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138 | |
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139 | #print a_ref, b_ref |
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140 | a, b = gradient_c(x0, y0, x1, y1, x2, y2, |
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141 | q0[i], q1[i], q2[i]) |
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142 | |
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143 | #print a, a_ref, b, b_ref |
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144 | assert abs(a - a_ref) < epsilon |
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145 | assert abs(b - b_ref) < epsilon |
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146 | |
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147 | |
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148 | |
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149 | #Geometric |
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150 | #def test_distance(self): |
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151 | # from util import distance# |
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152 | # |
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153 | # self.failUnless( distance([4,2],[7,6]) == 5.0, |
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154 | # 'Distance is wrong!') |
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155 | # self.failUnless( allclose(distance([7,6],[9,8]), 2.82842712475), |
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156 | # 'distance is wrong!') |
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157 | # self.failUnless( allclose(distance([9,8],[4,2]), 7.81024967591), |
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158 | # 'distance is wrong!') |
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159 | # |
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160 | # self.failUnless( distance([9,8],[4,2]) == distance([4,2],[9,8]), |
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161 | # 'distance is wrong!') |
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162 | |
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163 | def test_angle(self): |
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164 | from util import angle |
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165 | |
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166 | assert allclose(angle([1.0, 1.0])/pi*180, 45.0) |
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167 | |
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168 | |
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169 | def test_anglediff(self): |
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170 | from util import anglediff |
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171 | |
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172 | assert allclose(anglediff([0.0, 1.], [1.0, 1.0])/pi*180, 45.0) |
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173 | |
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174 | |
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175 | |
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176 | def test_file_function_time1(self): |
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177 | """Test that File function interpolates correctly |
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178 | between given times. No x,y dependency here. |
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179 | """ |
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180 | |
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181 | #Write file |
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182 | import os, time |
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183 | from config import time_format |
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184 | from math import sin, pi |
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185 | |
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186 | #Typical ASCII file |
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187 | finaltime = 1200 |
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188 | filename = 'test_file_function' |
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189 | fid = open(filename + '.txt', 'w') |
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190 | start = time.mktime(time.strptime('2000', '%Y')) |
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191 | dt = 60 #One minute intervals |
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192 | t = 0.0 |
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193 | while t <= finaltime: |
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194 | t_string = time.strftime(time_format, time.gmtime(t+start)) |
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195 | fid.write('%s, %f %f %f\n' %(t_string, 2*t, t**2, sin(t*pi/600))) |
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196 | t += dt |
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197 | |
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198 | fid.close() |
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199 | |
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200 | #Convert ASCII file to NetCDF (Which is what we really like!) |
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201 | timefile2netcdf(filename) |
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202 | |
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203 | |
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204 | #Create file function from time series |
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205 | F = file_function(filename + '.tms', |
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206 | quantities = ['Attribute0', |
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207 | 'Attribute1', |
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208 | 'Attribute2']) |
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209 | |
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210 | #Now try interpolation |
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211 | for i in range(20): |
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212 | t = i*10 |
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213 | q = F(t) |
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214 | |
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215 | #Exact linear intpolation |
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216 | assert allclose(q[0], 2*t) |
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217 | if i%6 == 0: |
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218 | assert allclose(q[1], t**2) |
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219 | assert allclose(q[2], sin(t*pi/600)) |
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220 | |
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221 | #Check non-exact |
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222 | |
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223 | t = 90 #Halfway between 60 and 120 |
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224 | q = F(t) |
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225 | assert allclose( (120**2 + 60**2)/2, q[1] ) |
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226 | assert allclose( (sin(120*pi/600) + sin(60*pi/600))/2, q[2] ) |
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227 | |
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228 | |
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229 | t = 100 #Two thirds of the way between between 60 and 120 |
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230 | q = F(t) |
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231 | assert allclose( 2*120**2/3 + 60**2/3, q[1] ) |
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232 | assert allclose( 2*sin(120*pi/600)/3 + sin(60*pi/600)/3, q[2] ) |
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233 | |
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234 | os.remove(filename + '.txt') |
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235 | os.remove(filename + '.tms') |
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236 | |
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237 | |
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238 | |
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239 | def test_spatio_temporal_file_function(self): |
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240 | """Test that spatio temporal file function performs the correct |
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241 | interpolations in both time and space |
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242 | NetCDF version (x,y,t dependency) |
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243 | """ |
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244 | import time |
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245 | |
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246 | #Create sww file of simple propagation from left to right |
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247 | #through rectangular domain |
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248 | from shallow_water import Domain, Dirichlet_boundary |
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249 | from mesh_factory import rectangular |
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250 | from Numeric import take, concatenate, reshape |
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251 | |
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252 | #Create basic mesh and shallow water domain |
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253 | points, vertices, boundary = rectangular(3, 3) |
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254 | domain1 = Domain(points, vertices, boundary) |
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255 | |
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256 | from util import mean |
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257 | domain1.reduction = mean |
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258 | domain1.smooth = True #NOTE: Mimic sww output where each vertex has |
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259 | # only one value. |
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260 | |
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261 | domain1.default_order = 2 |
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262 | domain1.store = True |
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263 | domain1.set_datadir('.') |
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264 | domain1.set_name('spatio_temporal_boundary_source_%d' %(id(self))) |
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265 | domain1.quantities_to_be_stored = ['stage', 'xmomentum', 'ymomentum'] |
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266 | |
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267 | #Bed-slope, friction and IC at vertices (and interpolated elsewhere) |
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268 | domain1.set_quantity('elevation', 0) |
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269 | domain1.set_quantity('friction', 0) |
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270 | domain1.set_quantity('stage', 0) |
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271 | |
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272 | # Boundary conditions |
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273 | B0 = Dirichlet_boundary([0,0,0]) |
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274 | B6 = Dirichlet_boundary([0.6,0,0]) |
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275 | domain1.set_boundary({'left': B6, 'top': B6, 'right': B0, 'bottom': B0}) |
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276 | domain1.check_integrity() |
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277 | |
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278 | finaltime = 8 |
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279 | #Evolution |
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280 | for t in domain1.evolve(yieldstep = 0.1, finaltime = finaltime): |
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281 | pass |
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282 | #domain1.write_time() |
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283 | |
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284 | |
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285 | #Now read data from sww and check |
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286 | from Scientific.IO.NetCDF import NetCDFFile |
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287 | filename = domain1.get_name() + '.' + domain1.format |
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288 | fid = NetCDFFile(filename) |
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289 | |
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290 | x = fid.variables['x'][:] |
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291 | y = fid.variables['y'][:] |
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292 | stage = fid.variables['stage'][:] |
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293 | xmomentum = fid.variables['xmomentum'][:] |
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294 | ymomentum = fid.variables['ymomentum'][:] |
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295 | time = fid.variables['time'][:] |
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296 | |
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297 | #Take stage vertex values at last timestep on diagonal |
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298 | #Diagonal is identified by vertices: 0, 5, 10, 15 |
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299 | |
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300 | timestep = len(time)-1 #Last timestep |
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301 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
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302 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
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303 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
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304 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
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305 | |
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306 | #Reference interpolated values at midpoints on diagonal at |
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307 | #this timestep are |
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308 | r0 = (D[0] + D[1])/2 |
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309 | r1 = (D[1] + D[2])/2 |
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310 | r2 = (D[2] + D[3])/2 |
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311 | |
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312 | #And the midpoints are found now |
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313 | Dx = take(reshape(x, (16,1)), [0,5,10,15]) |
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314 | Dy = take(reshape(y, (16,1)), [0,5,10,15]) |
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315 | |
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316 | diag = concatenate( (Dx, Dy), axis=1) |
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317 | d_midpoints = (diag[1:] + diag[:-1])/2 |
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318 | |
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319 | #Let us see if the file function can find the correct |
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320 | #values at the midpoints at the last timestep: |
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321 | f = file_function(filename, domain1, |
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322 | interpolation_points = d_midpoints) |
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323 | |
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324 | q = f(timestep/10., point_id=0); assert allclose(r0, q) |
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325 | q = f(timestep/10., point_id=1); assert allclose(r1, q) |
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326 | q = f(timestep/10., point_id=2); assert allclose(r2, q) |
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327 | |
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328 | |
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329 | ################## |
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330 | #Now do the same for the first timestep |
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331 | |
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332 | timestep = 0 #First timestep |
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333 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
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334 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
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335 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
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336 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
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337 | |
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338 | #Reference interpolated values at midpoints on diagonal at |
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339 | #this timestep are |
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340 | r0 = (D[0] + D[1])/2 |
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341 | r1 = (D[1] + D[2])/2 |
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342 | r2 = (D[2] + D[3])/2 |
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343 | |
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344 | #Let us see if the file function can find the correct |
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345 | #values |
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346 | q = f(0, point_id=0); assert allclose(r0, q) |
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347 | q = f(0, point_id=1); assert allclose(r1, q) |
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348 | q = f(0, point_id=2); assert allclose(r2, q) |
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349 | |
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350 | |
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351 | ################## |
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352 | #Now do it again for a timestep in the middle |
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353 | |
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354 | timestep = 33 |
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355 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
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356 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
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357 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
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358 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
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359 | |
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360 | #Reference interpolated values at midpoints on diagonal at |
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361 | #this timestep are |
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362 | r0 = (D[0] + D[1])/2 |
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363 | r1 = (D[1] + D[2])/2 |
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364 | r2 = (D[2] + D[3])/2 |
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365 | |
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366 | q = f(timestep/10., point_id=0); assert allclose(r0, q) |
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367 | q = f(timestep/10., point_id=1); assert allclose(r1, q) |
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368 | q = f(timestep/10., point_id=2); assert allclose(r2, q) |
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369 | |
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370 | |
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371 | ################## |
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372 | #Now check temporal interpolation |
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373 | #Halfway between timestep 15 and 16 |
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374 | |
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375 | timestep = 15 |
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376 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
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377 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
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378 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
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379 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
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380 | |
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381 | #Reference interpolated values at midpoints on diagonal at |
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382 | #this timestep are |
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383 | r0_0 = (D[0] + D[1])/2 |
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384 | r1_0 = (D[1] + D[2])/2 |
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385 | r2_0 = (D[2] + D[3])/2 |
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386 | |
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387 | # |
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388 | timestep = 16 |
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389 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
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390 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
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391 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
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392 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
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393 | |
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394 | #Reference interpolated values at midpoints on diagonal at |
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395 | #this timestep are |
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396 | r0_1 = (D[0] + D[1])/2 |
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397 | r1_1 = (D[1] + D[2])/2 |
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398 | r2_1 = (D[2] + D[3])/2 |
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399 | |
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400 | # The reference values are |
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401 | r0 = (r0_0 + r0_1)/2 |
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402 | r1 = (r1_0 + r1_1)/2 |
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403 | r2 = (r2_0 + r2_1)/2 |
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404 | |
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405 | q = f((timestep - 0.5)/10., point_id=0); assert allclose(r0, q) |
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406 | q = f((timestep - 0.5)/10., point_id=1); assert allclose(r1, q) |
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407 | q = f((timestep - 0.5)/10., point_id=2); assert allclose(r2, q) |
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408 | |
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409 | ################## |
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410 | #Finally check interpolation 2 thirds of the way |
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411 | #between timestep 15 and 16 |
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412 | |
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413 | # The reference values are |
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414 | r0 = (r0_0 + 2*r0_1)/3 |
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415 | r1 = (r1_0 + 2*r1_1)/3 |
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416 | r2 = (r2_0 + 2*r2_1)/3 |
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417 | |
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418 | #And the file function gives |
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419 | q = f((timestep - 1.0/3)/10., point_id=0); assert allclose(r0, q) |
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420 | q = f((timestep - 1.0/3)/10., point_id=1); assert allclose(r1, q) |
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421 | q = f((timestep - 1.0/3)/10., point_id=2); assert allclose(r2, q) |
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422 | |
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423 | fid.close() |
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424 | import os |
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425 | os.remove(filename) |
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426 | |
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427 | |
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428 | |
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429 | def test_spatio_temporal_file_function_different_origin(self): |
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430 | """Test that spatio temporal file function performs the correct |
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431 | interpolations in both time and space where space is offset by |
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432 | xllcorner and yllcorner |
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433 | NetCDF version (x,y,t dependency) |
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434 | """ |
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435 | import time |
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436 | |
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437 | #Create sww file of simple propagation from left to right |
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438 | #through rectangular domain |
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439 | from shallow_water import Domain, Dirichlet_boundary |
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440 | from mesh_factory import rectangular |
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441 | from Numeric import take, concatenate, reshape |
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442 | |
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443 | |
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444 | from coordinate_transforms.geo_reference import Geo_reference |
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445 | xllcorner = 2048 |
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446 | yllcorner = 11000 |
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447 | zone = 2 |
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448 | |
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449 | #Create basic mesh and shallow water domain |
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450 | points, vertices, boundary = rectangular(3, 3) |
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451 | domain1 = Domain(points, vertices, boundary, |
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452 | geo_reference = Geo_reference(xllcorner = xllcorner, |
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453 | yllcorner = yllcorner)) |
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454 | |
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455 | |
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456 | from util import mean |
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457 | domain1.reduction = mean |
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458 | domain1.smooth = True #NOTE: Mimic sww output where each vertex has |
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459 | # only one value. |
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460 | |
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461 | domain1.default_order = 2 |
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462 | domain1.store = True |
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463 | domain1.set_datadir('.') |
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464 | domain1.set_name('spatio_temporal_boundary_source_%d' %(id(self))) |
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465 | domain1.quantities_to_be_stored = ['stage', 'xmomentum', 'ymomentum'] |
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466 | |
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467 | #Bed-slope, friction and IC at vertices (and interpolated elsewhere) |
---|
468 | domain1.set_quantity('elevation', 0) |
---|
469 | domain1.set_quantity('friction', 0) |
---|
470 | domain1.set_quantity('stage', 0) |
---|
471 | |
---|
472 | # Boundary conditions |
---|
473 | B0 = Dirichlet_boundary([0,0,0]) |
---|
474 | B6 = Dirichlet_boundary([0.6,0,0]) |
---|
475 | domain1.set_boundary({'left': B6, 'top': B6, 'right': B0, 'bottom': B0}) |
---|
476 | domain1.check_integrity() |
---|
477 | |
---|
478 | finaltime = 8 |
---|
479 | #Evolution |
---|
480 | for t in domain1.evolve(yieldstep = 0.1, finaltime = finaltime): |
---|
481 | pass |
---|
482 | #domain1.write_time() |
---|
483 | |
---|
484 | |
---|
485 | #Now read data from sww and check |
---|
486 | from Scientific.IO.NetCDF import NetCDFFile |
---|
487 | filename = domain1.get_name() + '.' + domain1.format |
---|
488 | fid = NetCDFFile(filename) |
---|
489 | |
---|
490 | x = fid.variables['x'][:] |
---|
491 | y = fid.variables['y'][:] |
---|
492 | stage = fid.variables['stage'][:] |
---|
493 | xmomentum = fid.variables['xmomentum'][:] |
---|
494 | ymomentum = fid.variables['ymomentum'][:] |
---|
495 | time = fid.variables['time'][:] |
---|
496 | |
---|
497 | #Take stage vertex values at last timestep on diagonal |
---|
498 | #Diagonal is identified by vertices: 0, 5, 10, 15 |
---|
499 | |
---|
500 | timestep = len(time)-1 #Last timestep |
---|
501 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
---|
502 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
503 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
504 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
---|
505 | |
---|
506 | #Reference interpolated values at midpoints on diagonal at |
---|
507 | #this timestep are |
---|
508 | r0 = (D[0] + D[1])/2 |
---|
509 | r1 = (D[1] + D[2])/2 |
---|
510 | r2 = (D[2] + D[3])/2 |
---|
511 | |
---|
512 | #And the midpoints are found now |
---|
513 | Dx = take(reshape(x, (16,1)), [0,5,10,15]) |
---|
514 | Dy = take(reshape(y, (16,1)), [0,5,10,15]) |
---|
515 | |
---|
516 | diag = concatenate( (Dx, Dy), axis=1) |
---|
517 | d_midpoints = (diag[1:] + diag[:-1])/2 |
---|
518 | |
---|
519 | |
---|
520 | #Adjust for georef - make interpolation points absolute |
---|
521 | d_midpoints[:,0] += xllcorner |
---|
522 | d_midpoints[:,1] += yllcorner |
---|
523 | |
---|
524 | #Let us see if the file function can find the correct |
---|
525 | #values at the midpoints at the last timestep: |
---|
526 | f = file_function(filename, domain1, |
---|
527 | interpolation_points = d_midpoints) |
---|
528 | |
---|
529 | q = f(timestep/10., point_id=0); assert allclose(r0, q) |
---|
530 | q = f(timestep/10., point_id=1); assert allclose(r1, q) |
---|
531 | q = f(timestep/10., point_id=2); assert allclose(r2, q) |
---|
532 | |
---|
533 | |
---|
534 | ################## |
---|
535 | #Now do the same for the first timestep |
---|
536 | |
---|
537 | timestep = 0 #First timestep |
---|
538 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
---|
539 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
540 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
541 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
---|
542 | |
---|
543 | #Reference interpolated values at midpoints on diagonal at |
---|
544 | #this timestep are |
---|
545 | r0 = (D[0] + D[1])/2 |
---|
546 | r1 = (D[1] + D[2])/2 |
---|
547 | r2 = (D[2] + D[3])/2 |
---|
548 | |
---|
549 | #Let us see if the file function can find the correct |
---|
550 | #values |
---|
551 | q = f(0, point_id=0); assert allclose(r0, q) |
---|
552 | q = f(0, point_id=1); assert allclose(r1, q) |
---|
553 | q = f(0, point_id=2); assert allclose(r2, q) |
---|
554 | |
---|
555 | |
---|
556 | ################## |
---|
557 | #Now do it again for a timestep in the middle |
---|
558 | |
---|
559 | timestep = 33 |
---|
560 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
---|
561 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
562 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
563 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
---|
564 | |
---|
565 | #Reference interpolated values at midpoints on diagonal at |
---|
566 | #this timestep are |
---|
567 | r0 = (D[0] + D[1])/2 |
---|
568 | r1 = (D[1] + D[2])/2 |
---|
569 | r2 = (D[2] + D[3])/2 |
---|
570 | |
---|
571 | q = f(timestep/10., point_id=0); assert allclose(r0, q) |
---|
572 | q = f(timestep/10., point_id=1); assert allclose(r1, q) |
---|
573 | q = f(timestep/10., point_id=2); assert allclose(r2, q) |
---|
574 | |
---|
575 | |
---|
576 | ################## |
---|
577 | #Now check temporal interpolation |
---|
578 | #Halfway between timestep 15 and 16 |
---|
579 | |
---|
580 | timestep = 15 |
---|
581 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
---|
582 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
583 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
584 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
---|
585 | |
---|
586 | #Reference interpolated values at midpoints on diagonal at |
---|
587 | #this timestep are |
---|
588 | r0_0 = (D[0] + D[1])/2 |
---|
589 | r1_0 = (D[1] + D[2])/2 |
---|
590 | r2_0 = (D[2] + D[3])/2 |
---|
591 | |
---|
592 | # |
---|
593 | timestep = 16 |
---|
594 | d_stage = reshape(take(stage[timestep, :], [0,5,10,15]), (4,1)) |
---|
595 | d_uh = reshape(take(xmomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
596 | d_vh = reshape(take(ymomentum[timestep, :], [0,5,10,15]), (4,1)) |
---|
597 | D = concatenate( (d_stage, d_uh, d_vh), axis=1) |
---|
598 | |
---|
599 | #Reference interpolated values at midpoints on diagonal at |
---|
600 | #this timestep are |
---|
601 | r0_1 = (D[0] + D[1])/2 |
---|
602 | r1_1 = (D[1] + D[2])/2 |
---|
603 | r2_1 = (D[2] + D[3])/2 |
---|
604 | |
---|
605 | # The reference values are |
---|
606 | r0 = (r0_0 + r0_1)/2 |
---|
607 | r1 = (r1_0 + r1_1)/2 |
---|
608 | r2 = (r2_0 + r2_1)/2 |
---|
609 | |
---|
610 | q = f((timestep - 0.5)/10., point_id=0); assert allclose(r0, q) |
---|
611 | q = f((timestep - 0.5)/10., point_id=1); assert allclose(r1, q) |
---|
612 | q = f((timestep - 0.5)/10., point_id=2); assert allclose(r2, q) |
---|
613 | |
---|
614 | ################## |
---|
615 | #Finally check interpolation 2 thirds of the way |
---|
616 | #between timestep 15 and 16 |
---|
617 | |
---|
618 | # The reference values are |
---|
619 | r0 = (r0_0 + 2*r0_1)/3 |
---|
620 | r1 = (r1_0 + 2*r1_1)/3 |
---|
621 | r2 = (r2_0 + 2*r2_1)/3 |
---|
622 | |
---|
623 | #And the file function gives |
---|
624 | q = f((timestep - 1.0/3)/10., point_id=0); assert allclose(r0, q) |
---|
625 | q = f((timestep - 1.0/3)/10., point_id=1); assert allclose(r1, q) |
---|
626 | q = f((timestep - 1.0/3)/10., point_id=2); assert allclose(r2, q) |
---|
627 | |
---|
628 | fid.close() |
---|
629 | import os |
---|
630 | os.remove(filename) |
---|
631 | |
---|
632 | |
---|
633 | |
---|
634 | |
---|
635 | def test_spatio_temporal_file_function_time(self): |
---|
636 | """Test that File function interpolates correctly |
---|
637 | between given times. |
---|
638 | NetCDF version (x,y,t dependency) |
---|
639 | """ |
---|
640 | |
---|
641 | #Create NetCDF (sww) file to be read |
---|
642 | # x: 0, 5, 10, 15 |
---|
643 | # y: -20, -10, 0, 10 |
---|
644 | # t: 0, 60, 120, ...., 1200 |
---|
645 | # |
---|
646 | # test quantities (arbitrary but non-trivial expressions): |
---|
647 | # |
---|
648 | # stage = 3*x - y**2 + 2*t |
---|
649 | # xmomentum = exp( -((x-7)**2 + (y+5)**2)/20 ) * t**2 |
---|
650 | # ymomentum = x**2 + y**2 * sin(t*pi/600) |
---|
651 | |
---|
652 | #NOTE: Nice test that may render some of the others redundant. |
---|
653 | |
---|
654 | import os, time |
---|
655 | from config import time_format |
---|
656 | from Numeric import sin, pi, exp |
---|
657 | from mesh_factory import rectangular |
---|
658 | from shallow_water import Domain |
---|
659 | import data_manager |
---|
660 | |
---|
661 | finaltime = 1200 |
---|
662 | filename = 'test_file_function' |
---|
663 | |
---|
664 | #Create a domain to hold test grid |
---|
665 | #(0:15, -20:10) |
---|
666 | points, vertices, boundary =\ |
---|
667 | rectangular(4, 4, 15, 30, origin = (0, -20)) |
---|
668 | |
---|
669 | |
---|
670 | #print 'Number of elements', len(vertices) |
---|
671 | domain = Domain(points, vertices, boundary) |
---|
672 | domain.smooth = False |
---|
673 | domain.default_order = 2 |
---|
674 | domain.set_datadir('.') |
---|
675 | domain.set_name(filename) |
---|
676 | domain.store = True |
---|
677 | domain.format = 'sww' #Native netcdf visualisation format |
---|
678 | |
---|
679 | #print points |
---|
680 | start = time.mktime(time.strptime('2000', '%Y')) |
---|
681 | domain.starttime = start |
---|
682 | |
---|
683 | |
---|
684 | #Store structure |
---|
685 | domain.initialise_storage() |
---|
686 | |
---|
687 | #Compute artificial time steps and store |
---|
688 | dt = 60 #One minute intervals |
---|
689 | t = 0.0 |
---|
690 | while t <= finaltime: |
---|
691 | #Compute quantities |
---|
692 | f1 = lambda x,y: 3*x - y**2 + 2*t + 4 |
---|
693 | domain.set_quantity('stage', f1) |
---|
694 | |
---|
695 | f2 = lambda x,y: x+y+t**2 |
---|
696 | domain.set_quantity('xmomentum', f2) |
---|
697 | |
---|
698 | f3 = lambda x,y: x**2 + y**2 * sin(t*pi/600) |
---|
699 | domain.set_quantity('ymomentum', f3) |
---|
700 | |
---|
701 | #Store and advance time |
---|
702 | domain.time = t |
---|
703 | domain.store_timestep(domain.conserved_quantities) |
---|
704 | t += dt |
---|
705 | |
---|
706 | |
---|
707 | interpolation_points = [[0,-20], [1,0], [0,1], [1.1, 3.14], [10,-12.5]] |
---|
708 | |
---|
709 | |
---|
710 | |
---|
711 | #Deliberately set domain.starttime to too early |
---|
712 | domain.starttime = start - 1 |
---|
713 | |
---|
714 | #Create file function |
---|
715 | F = file_function(filename + '.sww', domain, |
---|
716 | quantities = domain.conserved_quantities, |
---|
717 | interpolation_points = interpolation_points) |
---|
718 | |
---|
719 | #Check that FF updates fixes domain starttime |
---|
720 | assert allclose(domain.starttime, start) |
---|
721 | |
---|
722 | #Check that domain.starttime isn't updated if later |
---|
723 | domain.starttime = start + 1 |
---|
724 | F = file_function(filename + '.sww', domain, |
---|
725 | quantities = domain.conserved_quantities, |
---|
726 | interpolation_points = interpolation_points) |
---|
727 | assert allclose(domain.starttime, start+1) |
---|
728 | domain.starttime = start |
---|
729 | |
---|
730 | |
---|
731 | #Check linear interpolation in time |
---|
732 | F = file_function(filename + '.sww', domain, |
---|
733 | quantities = domain.conserved_quantities, |
---|
734 | interpolation_points = interpolation_points) |
---|
735 | for id in range(len(interpolation_points)): |
---|
736 | x = interpolation_points[id][0] |
---|
737 | y = interpolation_points[id][1] |
---|
738 | |
---|
739 | for i in range(20): |
---|
740 | t = i*10 |
---|
741 | k = i%6 |
---|
742 | |
---|
743 | if k == 0: |
---|
744 | q0 = F(t, point_id=id) |
---|
745 | q1 = F(t+60, point_id=id) |
---|
746 | |
---|
747 | |
---|
748 | q = F(t, point_id=id) |
---|
749 | #print i, k, t, q |
---|
750 | #print ' ', q0 |
---|
751 | #print ' ', q1 |
---|
752 | #print 's', (k*q1 + (6-k)*q0)/6 |
---|
753 | #print |
---|
754 | assert allclose(q, (k*q1 + (6-k)*q0)/6) |
---|
755 | |
---|
756 | |
---|
757 | #Another check of linear interpolation in time |
---|
758 | for id in range(len(interpolation_points)): |
---|
759 | q60 = F(60, point_id=id) |
---|
760 | q120 = F(120, point_id=id) |
---|
761 | |
---|
762 | t = 90 #Halfway between 60 and 120 |
---|
763 | q = F(t, point_id=id) |
---|
764 | assert allclose( (q120+q60)/2, q ) |
---|
765 | |
---|
766 | t = 100 #Two thirds of the way between between 60 and 120 |
---|
767 | q = F(t, point_id=id) |
---|
768 | assert allclose(q60/3 + 2*q120/3, q) |
---|
769 | |
---|
770 | |
---|
771 | |
---|
772 | #Check that domain.starttime isn't updated if later than file starttime but earlier |
---|
773 | #than file end time |
---|
774 | delta = 23 |
---|
775 | domain.starttime = start + delta |
---|
776 | F = file_function(filename + '.sww', domain, |
---|
777 | quantities = domain.conserved_quantities, |
---|
778 | interpolation_points = interpolation_points) |
---|
779 | assert allclose(domain.starttime, start+delta) |
---|
780 | |
---|
781 | |
---|
782 | |
---|
783 | |
---|
784 | #Now try interpolation with delta offset |
---|
785 | for id in range(len(interpolation_points)): |
---|
786 | x = interpolation_points[id][0] |
---|
787 | y = interpolation_points[id][1] |
---|
788 | |
---|
789 | for i in range(20): |
---|
790 | t = i*10 |
---|
791 | k = i%6 |
---|
792 | |
---|
793 | if k == 0: |
---|
794 | q0 = F(t-delta, point_id=id) |
---|
795 | q1 = F(t+60-delta, point_id=id) |
---|
796 | |
---|
797 | q = F(t-delta, point_id=id) |
---|
798 | assert allclose(q, (k*q1 + (6-k)*q0)/6) |
---|
799 | |
---|
800 | |
---|
801 | os.remove(filename + '.sww') |
---|
802 | |
---|
803 | |
---|
804 | |
---|
805 | def test_file_function_time_with_domain(self): |
---|
806 | """Test that File function interpolates correctly |
---|
807 | between given times. No x,y dependency here. |
---|
808 | Use domain with starttime |
---|
809 | """ |
---|
810 | |
---|
811 | #Write file |
---|
812 | import os, time, calendar |
---|
813 | from config import time_format |
---|
814 | from math import sin, pi |
---|
815 | from domain import Domain |
---|
816 | |
---|
817 | finaltime = 1200 |
---|
818 | filename = 'test_file_function' |
---|
819 | fid = open(filename + '.txt', 'w') |
---|
820 | start = time.mktime(time.strptime('2000', '%Y')) |
---|
821 | dt = 60 #One minute intervals |
---|
822 | t = 0.0 |
---|
823 | while t <= finaltime: |
---|
824 | t_string = time.strftime(time_format, time.gmtime(t+start)) |
---|
825 | fid.write('%s, %f %f %f\n' %(t_string, 2*t, t**2, sin(t*pi/600))) |
---|
826 | t += dt |
---|
827 | |
---|
828 | fid.close() |
---|
829 | |
---|
830 | |
---|
831 | #Convert ASCII file to NetCDF (Which is what we really like!) |
---|
832 | timefile2netcdf(filename) |
---|
833 | |
---|
834 | |
---|
835 | |
---|
836 | a = [0.0, 0.0] |
---|
837 | b = [4.0, 0.0] |
---|
838 | c = [0.0, 3.0] |
---|
839 | |
---|
840 | points = [a, b, c] |
---|
841 | vertices = [[0,1,2]] |
---|
842 | domain = Domain(points, vertices) |
---|
843 | |
---|
844 | #Check that domain.starttime is updated if non-existing |
---|
845 | F = file_function(filename + '.tms', domain) |
---|
846 | |
---|
847 | assert allclose(domain.starttime, start) |
---|
848 | |
---|
849 | #Check that domain.starttime is updated if too early |
---|
850 | domain.starttime = start - 1 |
---|
851 | F = file_function(filename + '.tms', domain) |
---|
852 | assert allclose(domain.starttime, start) |
---|
853 | |
---|
854 | #Check that domain.starttime isn't updated if later |
---|
855 | domain.starttime = start + 1 |
---|
856 | F = file_function(filename + '.tms', domain) |
---|
857 | assert allclose(domain.starttime, start+1) |
---|
858 | |
---|
859 | domain.starttime = start |
---|
860 | F = file_function(filename + '.tms', domain, |
---|
861 | quantities = ['Attribute0', 'Attribute1', 'Attribute2']) |
---|
862 | |
---|
863 | |
---|
864 | #print F.T |
---|
865 | #print F.precomputed_values |
---|
866 | #print 'F(60)', F(60) |
---|
867 | |
---|
868 | #Now try interpolation |
---|
869 | for i in range(20): |
---|
870 | t = i*10 |
---|
871 | q = F(t) |
---|
872 | |
---|
873 | #Exact linear intpolation |
---|
874 | assert allclose(q[0], 2*t) |
---|
875 | if i%6 == 0: |
---|
876 | assert allclose(q[1], t**2) |
---|
877 | assert allclose(q[2], sin(t*pi/600)) |
---|
878 | |
---|
879 | #Check non-exact |
---|
880 | |
---|
881 | t = 90 #Halfway between 60 and 120 |
---|
882 | q = F(t) |
---|
883 | assert allclose( (120**2 + 60**2)/2, q[1] ) |
---|
884 | assert allclose( (sin(120*pi/600) + sin(60*pi/600))/2, q[2] ) |
---|
885 | |
---|
886 | |
---|
887 | t = 100 #Two thirds of the way between between 60 and 120 |
---|
888 | q = F(t) |
---|
889 | assert allclose( 2*120**2/3 + 60**2/3, q[1] ) |
---|
890 | assert allclose( 2*sin(120*pi/600)/3 + sin(60*pi/600)/3, q[2] ) |
---|
891 | |
---|
892 | os.remove(filename + '.tms') |
---|
893 | os.remove(filename + '.txt') |
---|
894 | |
---|
895 | def test_file_function_time_with_domain_different_start(self): |
---|
896 | """Test that File function interpolates correctly |
---|
897 | between given times. No x,y dependency here. |
---|
898 | Use domain with a starttime later than that of file |
---|
899 | |
---|
900 | ASCII version |
---|
901 | """ |
---|
902 | |
---|
903 | #Write file |
---|
904 | import os, time, calendar |
---|
905 | from config import time_format |
---|
906 | from math import sin, pi |
---|
907 | from domain import Domain |
---|
908 | |
---|
909 | finaltime = 1200 |
---|
910 | filename = 'test_file_function' |
---|
911 | fid = open(filename + '.txt', 'w') |
---|
912 | start = time.mktime(time.strptime('2000', '%Y')) |
---|
913 | dt = 60 #One minute intervals |
---|
914 | t = 0.0 |
---|
915 | while t <= finaltime: |
---|
916 | t_string = time.strftime(time_format, time.gmtime(t+start)) |
---|
917 | fid.write('%s, %f %f %f\n' %(t_string, 2*t, t**2, sin(t*pi/600))) |
---|
918 | t += dt |
---|
919 | |
---|
920 | fid.close() |
---|
921 | |
---|
922 | #Convert ASCII file to NetCDF (Which is what we really like!) |
---|
923 | timefile2netcdf(filename) |
---|
924 | |
---|
925 | a = [0.0, 0.0] |
---|
926 | b = [4.0, 0.0] |
---|
927 | c = [0.0, 3.0] |
---|
928 | |
---|
929 | points = [a, b, c] |
---|
930 | vertices = [[0,1,2]] |
---|
931 | domain = Domain(points, vertices) |
---|
932 | |
---|
933 | #Check that domain.starttime isn't updated if later than file starttime but earlier |
---|
934 | #than file end time |
---|
935 | delta = 23 |
---|
936 | domain.starttime = start + delta |
---|
937 | F = file_function(filename + '.tms', domain, |
---|
938 | quantities = ['Attribute0', 'Attribute1', 'Attribute2']) |
---|
939 | assert allclose(domain.starttime, start+delta) |
---|
940 | |
---|
941 | |
---|
942 | |
---|
943 | |
---|
944 | #Now try interpolation with delta offset |
---|
945 | for i in range(20): |
---|
946 | t = i*10 |
---|
947 | q = F(t-delta) |
---|
948 | |
---|
949 | #Exact linear intpolation |
---|
950 | assert allclose(q[0], 2*t) |
---|
951 | if i%6 == 0: |
---|
952 | assert allclose(q[1], t**2) |
---|
953 | assert allclose(q[2], sin(t*pi/600)) |
---|
954 | |
---|
955 | #Check non-exact |
---|
956 | |
---|
957 | t = 90 #Halfway between 60 and 120 |
---|
958 | q = F(t-delta) |
---|
959 | assert allclose( (120**2 + 60**2)/2, q[1] ) |
---|
960 | assert allclose( (sin(120*pi/600) + sin(60*pi/600))/2, q[2] ) |
---|
961 | |
---|
962 | |
---|
963 | t = 100 #Two thirds of the way between between 60 and 120 |
---|
964 | q = F(t-delta) |
---|
965 | assert allclose( 2*120**2/3 + 60**2/3, q[1] ) |
---|
966 | assert allclose( 2*sin(120*pi/600)/3 + sin(60*pi/600)/3, q[2] ) |
---|
967 | |
---|
968 | |
---|
969 | os.remove(filename + '.tms') |
---|
970 | os.remove(filename + '.txt') |
---|
971 | |
---|
972 | |
---|
973 | |
---|
974 | def test_apply_expression_to_dictionary(self): |
---|
975 | |
---|
976 | foo = array([[1,2,3], |
---|
977 | [4,5,6]]) |
---|
978 | |
---|
979 | bar = array([[-1,0,5], |
---|
980 | [6,1,1]]) |
---|
981 | |
---|
982 | D = {'X': foo, 'Y': bar} |
---|
983 | |
---|
984 | Z = apply_expression_to_dictionary('X+Y', D) |
---|
985 | assert allclose(Z, foo+bar) |
---|
986 | |
---|
987 | Z = apply_expression_to_dictionary('X*Y', D) |
---|
988 | assert allclose(Z, foo*bar) |
---|
989 | |
---|
990 | Z = apply_expression_to_dictionary('4*X+Y', D) |
---|
991 | assert allclose(Z, 4*foo+bar) |
---|
992 | |
---|
993 | #Check exceptions |
---|
994 | try: |
---|
995 | #Wrong name |
---|
996 | Z = apply_expression_to_dictionary('4*X+A', D) |
---|
997 | except NameError: |
---|
998 | pass |
---|
999 | else: |
---|
1000 | msg = 'Should have raised a NameError Exception' |
---|
1001 | raise msg |
---|
1002 | |
---|
1003 | |
---|
1004 | try: |
---|
1005 | #Wrong order |
---|
1006 | Z = apply_expression_to_dictionary(D, '4*X+A') |
---|
1007 | except AssertionError: |
---|
1008 | pass |
---|
1009 | else: |
---|
1010 | msg = 'Should have raised a AssertionError Exception' |
---|
1011 | raise msg |
---|
1012 | |
---|
1013 | |
---|
1014 | def test_multiple_replace(self): |
---|
1015 | """Hard test that checks a true word-by-word simultaneous replace |
---|
1016 | """ |
---|
1017 | |
---|
1018 | D = {'x': 'xi', 'y': 'eta', 'xi':'lam'} |
---|
1019 | exp = '3*x+y + xi' |
---|
1020 | |
---|
1021 | new = multiple_replace(exp, D) |
---|
1022 | |
---|
1023 | assert new == '3*xi+eta + lam' |
---|
1024 | |
---|
1025 | |
---|
1026 | |
---|
1027 | def test_point_on_line_obsolete(self): |
---|
1028 | """Test that obsolete call issues appropriate warning""" |
---|
1029 | |
---|
1030 | #Turn warning into an exception |
---|
1031 | import warnings |
---|
1032 | warnings.filterwarnings('error') |
---|
1033 | |
---|
1034 | try: |
---|
1035 | assert point_on_line( 0, 0.5, 0,1, 0,0 ) |
---|
1036 | except DeprecationWarning: |
---|
1037 | pass |
---|
1038 | else: |
---|
1039 | msg = 'point_on_line should have issued a DeprecationWarning' |
---|
1040 | raise Exception(msg) |
---|
1041 | |
---|
1042 | warnings.resetwarnings() |
---|
1043 | |
---|
1044 | |
---|
1045 | #------------------------------------------------------------- |
---|
1046 | if __name__ == "__main__": |
---|
1047 | suite = unittest.makeSuite(Test_Util,'test') |
---|
1048 | #suite = unittest.makeSuite(Test_Util,'test_file_function_time') |
---|
1049 | runner = unittest.TextTestRunner() |
---|
1050 | runner.run(suite) |
---|
1051 | |
---|
1052 | |
---|
1053 | |
---|
1054 | |
---|