internal/ceres/is_close_test.cc

   1 // Ceres Solver - A fast non-linear least squares minimizer
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  29 // Author: dgossow@google.com (David Gossow)
  30 //
  31 // This file contains tests for the IsClose function.
  32
  33 #include "ceres/is_close.h"
  34 #include "gtest/gtest.h"
  35
  36 namespace ceres {
  37 namespace internal {
  38
  39 const double kTolerance = 1e-9;
  40
  41 TEST(IsClose, BothParametersPositive) {
  42   double relative_error = -1;
  43   double absolute_error = -1;
  44
  45   // Test cases where both values are positive.
  46   EXPECT_TRUE(IsClose(9.9, 10.0, 0.011, &relative_error, &absolute_error));
  47   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  48   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  49   relative_error = -1;
  50   absolute_error = -1;
  51   EXPECT_TRUE(IsClose(10.0, 9.9, 0.011, &relative_error, &absolute_error));
  52   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  53   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  54   relative_error = -1;
  55   absolute_error = -1;
  56
  57   EXPECT_FALSE(IsClose(9.9, 10.0, 0.009, &relative_error, &absolute_error));
  58   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  59   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  60   relative_error = -1;
  61   absolute_error = -1;
  62   EXPECT_FALSE(IsClose(10.0, 9.9, 0.009, &relative_error, &absolute_error));
  63   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  64   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  65 }
  66
  67 TEST(IsClose, BothParametersNegative) {
  68   double relative_error = -1;
  69   double absolute_error = -1;
  70
  71   // Test cases where both values are negative.
  72   EXPECT_TRUE(IsClose(-9.9, -10.0, 0.011, &relative_error, &absolute_error));
  73   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  74   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  75   relative_error = -1;
  76   absolute_error = -1;
  77   EXPECT_TRUE(IsClose(-10.0, -9.9, 0.011, &relative_error, &absolute_error));
  78   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  79   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  80   relative_error = -1;
  81   absolute_error = -1;
  82
  83   EXPECT_FALSE(IsClose(-9.9, -10.0, 0.009, &relative_error, &absolute_error));
  84   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  85   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  86   relative_error = -1;
  87   absolute_error = -1;
  88   EXPECT_FALSE(IsClose(-10.0, -9.9, 0.009, &relative_error, &absolute_error));
  89   EXPECT_NEAR(relative_error, 0.01, kTolerance);
  90   EXPECT_NEAR(absolute_error, 0.1, kTolerance);
  91 }
  92
  93 TEST(IsClose, ParametersHaveMixedSigns) {
  94   double relative_error = -1;
  95   double absolute_error = -1;
  96
  97   // Test cases with mixed signs.
  98   EXPECT_FALSE(IsClose(-0.1, 0.1, 1.99, &relative_error, &absolute_error));
  99   EXPECT_NEAR(relative_error, 2.0, kTolerance);
 100   EXPECT_NEAR(absolute_error, 0.2, kTolerance);
 101   relative_error = -1;
 102   absolute_error = -1;
 103   EXPECT_TRUE(IsClose(-0.1, 0.1, 2.01, &relative_error, &absolute_error));
 104   EXPECT_NEAR(relative_error, 2.0, kTolerance);
 105   EXPECT_NEAR(absolute_error, 0.2, kTolerance);
 106   relative_error = -1;
 107   absolute_error = -1;
 108   EXPECT_FALSE(IsClose(0.1, -0.1, 1.99, &relative_error, &absolute_error));
 109   EXPECT_NEAR(relative_error, 2.0, kTolerance);
 110   EXPECT_NEAR(absolute_error, 0.2, kTolerance);
 111   relative_error = -1;
 112   absolute_error = -1;
 113   EXPECT_TRUE(IsClose(0.1, -0.1, 2.01, &relative_error, &absolute_error));
 114   EXPECT_NEAR(relative_error, 2.0, kTolerance);
 115   EXPECT_NEAR(absolute_error, 0.2, kTolerance);
 116 }
 117
 118 TEST(IsClose, OneParameterZero) {
 119   double relative_error = -1;
 120   double absolute_error = -1;
 121
 122   // Test cases where one of the values is zero.
 123   EXPECT_TRUE(IsClose(0.0, 10.0, 10.1, &relative_error, &absolute_error));
 124   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 125   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 126   relative_error = -1;
 127   absolute_error = -1;
 128   EXPECT_TRUE(IsClose(10.0, 0.0, 10.1, &relative_error, &absolute_error));
 129   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 130   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 131   relative_error = -1;
 132   absolute_error = -1;
 133   EXPECT_TRUE(IsClose(0.0, -10.0, 10.1, &relative_error, &absolute_error));
 134   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 135   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 136   relative_error = -1;
 137   absolute_error = -1;
 138   EXPECT_TRUE(IsClose(-10.0, 0.0, 10.1, &relative_error, &absolute_error));
 139   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 140   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 141   relative_error = -1;
 142   absolute_error = -1;
 143
 144   EXPECT_FALSE(IsClose(0, 10.0, 9.9, &relative_error, &absolute_error));
 145   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 146   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 147   relative_error = -1;
 148   absolute_error = -1;
 149   EXPECT_FALSE(IsClose(10.0, 0.0, 9.9, &relative_error, &absolute_error));
 150   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 151   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 152   relative_error = -1;
 153   absolute_error = -1;
 154   EXPECT_FALSE(IsClose(0, -10.0, 9.9, &relative_error, &absolute_error));
 155   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 156   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 157   relative_error = -1;
 158   absolute_error = -1;
 159   EXPECT_FALSE(IsClose(-10.0, 0.0, 9.9, &relative_error, &absolute_error));
 160   EXPECT_NEAR(relative_error, 10.0, kTolerance);
 161   EXPECT_NEAR(absolute_error, 10.0, kTolerance);
 162 }
 163
 164 TEST(IsClose, BothParametersZero) {
 165   double relative_error = -1;
 166   double absolute_error = -1;
 167   EXPECT_TRUE(IsClose(0.0, 0.0, 0.1, &relative_error, &absolute_error));
 168   EXPECT_NEAR(relative_error, 0.0, kTolerance);
 169   EXPECT_NEAR(absolute_error, 0.0, kTolerance);
 170   relative_error = -1;
 171   absolute_error = -1;
 172   EXPECT_FALSE(IsClose(0.0, 0.0, 0.0, &relative_error, &absolute_error));
 173   EXPECT_NEAR(relative_error, 0.0, kTolerance);
 174   EXPECT_NEAR(absolute_error, 0.0, kTolerance);
 175 }
 176 }  // namespace internal
 177 }  // namespace ceres