Add simple unit tests for GradientProblem.
Change-Id: Id3b25a177aa92032f7f99b0a381c4f97d07d73b2
diff --git a/internal/ceres/CMakeLists.txt b/internal/ceres/CMakeLists.txt
index a06f3a5..3108634 100644
--- a/internal/ceres/CMakeLists.txt
+++ b/internal/ceres/CMakeLists.txt
@@ -262,6 +262,7 @@
CERES_TEST(evaluator)
CERES_TEST(gradient_checker)
CERES_TEST(gradient_checking_cost_function)
+ CERES_TEST(gradient_problem)
CERES_TEST(graph)
CERES_TEST(graph_algorithms)
CERES_TEST(householder_vector)
diff --git a/internal/ceres/gradient_problem_test.cc b/internal/ceres/gradient_problem_test.cc
new file mode 100644
index 0000000..b352577
--- /dev/null
+++ b/internal/ceres/gradient_problem_test.cc
@@ -0,0 +1,111 @@
+// 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: strandmark@google.com (Petter Strandmark)
+
+#include "ceres/gradient_problem.h"
+
+#include "gtest/gtest.h"
+
+namespace ceres {
+namespace internal {
+
+class QuadraticTestFunction : public ceres::FirstOrderFunction {
+ public:
+ explicit QuadraticTestFunction(bool* flag_to_set_on_destruction = NULL)
+ : flag_to_set_on_destruction_(flag_to_set_on_destruction) {}
+
+ virtual ~QuadraticTestFunction() {
+ if (flag_to_set_on_destruction_) {
+ *flag_to_set_on_destruction_ = true;
+ }
+ }
+
+ virtual bool Evaluate(const double* parameters,
+ double* cost,
+ double* gradient) const {
+ const double x = parameters[0];
+ cost[0] = x * x;
+ if (gradient != NULL) {
+ gradient[0] = 2.0 * x;
+ }
+ return true;
+ }
+
+ virtual int NumParameters() const { return 1; }
+
+ private:
+ bool* flag_to_set_on_destruction_;
+};
+
+TEST(GradientProblem, TakesOwnershipOfFirstOrderFunction) {
+ bool is_destructed = false;
+ {
+ ceres::GradientProblem problem(new QuadraticTestFunction(&is_destructed));
+ }
+ EXPECT_TRUE(is_destructed);
+}
+
+TEST(GradientProblem, EvaluationWithoutParameterizationOrGradient) {
+ ceres::GradientProblem problem(new QuadraticTestFunction());
+ double x = 7.0;
+ double cost = 0;
+ problem.Evaluate(&x, &cost, NULL);
+ EXPECT_EQ(x * x, cost);
+}
+
+TEST(GradientProblem, EvalutaionWithParameterizationAndNoGradient) {
+ ceres::GradientProblem problem(new QuadraticTestFunction(),
+ new IdentityParameterization(1));
+ double x = 7.0;
+ double cost = 0;
+ problem.Evaluate(&x, &cost, NULL);
+ EXPECT_EQ(x * x, cost);
+}
+
+TEST(GradientProblem, EvaluationWithoutParameterizationAndWithGradient) {
+ ceres::GradientProblem problem(new QuadraticTestFunction());
+ double x = 7.0;
+ double cost = 0;
+ double gradient = 0;
+ problem.Evaluate(&x, &cost, &gradient);
+ EXPECT_EQ(2.0 * x, gradient);
+}
+
+TEST(GradientProblem, EvaluationWithParameterizationAndWithGradient) {
+ ceres::GradientProblem problem(new QuadraticTestFunction(),
+ new IdentityParameterization(1));
+ double x = 7.0;
+ double cost = 0;
+ double gradient = 0;
+ problem.Evaluate(&x, &cost, &gradient);
+ EXPECT_EQ(2.0 * x, gradient);
+}
+
+} // namespace internal
+} // namespace ceres
