Squashed 'third_party/ceres/' content from commit e51e9b4
Change-Id: I763587619d57e594d3fa158dc3a7fe0b89a1743b
git-subtree-dir: third_party/ceres
git-subtree-split: e51e9b46f6ca88ab8b2266d0e362771db6d98067
diff --git a/internal/ceres/is_close_test.cc b/internal/ceres/is_close_test.cc
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+// Ceres Solver - A fast non-linear least squares minimizer
+// Copyright 2015 Google Inc. All rights reserved.
+// http://ceres-solver.org/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors may be
+// used to endorse or promote products derived from this software without
+// specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: dgossow@google.com (David Gossow)
+//
+// This file contains tests for the IsClose function.
+
+#include "ceres/is_close.h"
+#include "gtest/gtest.h"
+
+namespace ceres {
+namespace internal {
+
+const double kTolerance = 1e-9;
+
+TEST(IsClose, BothParametersPositive) {
+ double relative_error = -1;
+ double absolute_error = -1;
+
+ // Test cases where both values are positive.
+ EXPECT_TRUE(IsClose(9.9, 10.0, 0.011, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(10.0, 9.9, 0.011, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+
+ EXPECT_FALSE(IsClose(9.9, 10.0, 0.009, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(10.0, 9.9, 0.009, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+}
+
+TEST(IsClose, BothParametersNegative) {
+ double relative_error = -1;
+ double absolute_error = -1;
+
+ // Test cases where both values are negative.
+ EXPECT_TRUE(IsClose(-9.9, -10.0, 0.011, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(-10.0, -9.9, 0.011, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+
+ EXPECT_FALSE(IsClose(-9.9, -10.0, 0.009, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(-10.0, -9.9, 0.009, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.01, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.1, kTolerance);
+}
+
+TEST(IsClose, ParametersHaveMixedSigns) {
+ double relative_error = -1;
+ double absolute_error = -1;
+
+ // Test cases with mixed signs.
+ EXPECT_FALSE(IsClose(-0.1, 0.1, 1.99, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 2.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.2, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(-0.1, 0.1, 2.01, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 2.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.2, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(0.1, -0.1, 1.99, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 2.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.2, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(0.1, -0.1, 2.01, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 2.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.2, kTolerance);
+}
+
+TEST(IsClose, OneParameterZero) {
+ double relative_error = -1;
+ double absolute_error = -1;
+
+ // Test cases where one of the values is zero.
+ EXPECT_TRUE(IsClose(0.0, 10.0, 10.1, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(10.0, 0.0, 10.1, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(0.0, -10.0, 10.1, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_TRUE(IsClose(-10.0, 0.0, 10.1, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+
+ EXPECT_FALSE(IsClose(0, 10.0, 9.9, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(10.0, 0.0, 9.9, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(0, -10.0, 9.9, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(-10.0, 0.0, 9.9, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 10.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 10.0, kTolerance);
+}
+
+TEST(IsClose, BothParametersZero) {
+ double relative_error = -1;
+ double absolute_error = -1;
+ EXPECT_TRUE(IsClose(0.0, 0.0, 0.1, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.0, kTolerance);
+ relative_error = -1;
+ absolute_error = -1;
+ EXPECT_FALSE(IsClose(0.0, 0.0, 0.0, &relative_error, &absolute_error));
+ EXPECT_NEAR(relative_error, 0.0, kTolerance);
+ EXPECT_NEAR(absolute_error, 0.0, kTolerance);
+}
+} // namespace internal
+} // namespace ceres