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#include <cxxtest/TestSuite.h>
#include "common/math.h"
// Macro function for asserting that the compared values x and y
// aren't further apart from each other than z.
#define TS_ASSERT_ALMOST_EQUALS(x, y, z) \
TS_ASSERT_LESS_THAN_EQUALS(((x) - (y)) >= 0 ? (x) - (y) : (y) - (x), z)
const float MAX_ERROR = 0.000001;
class MathTestSuite : public CxxTest::TestSuite
{
public:
void test_intLog2() {
// Test special case for 0
TS_ASSERT_EQUALS(Common::intLog2(0), -1);
// intLog2 should round the result towards 0
TS_ASSERT_EQUALS(Common::intLog2(7), 2);
// Some simple test for 2^10
TS_ASSERT_EQUALS(Common::intLog2(1024), 10);
}
void test_rad2deg() {
TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(0), 0, MAX_ERROR);
TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(M_PI), 180.0, MAX_ERROR);
TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(2.0 * M_PI), 360.0, MAX_ERROR);
TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(M_PI / 2.0), 90.0, MAX_ERROR);
}
void test_deg2rad() {
TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(0), 0, MAX_ERROR);
TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(180.0), M_PI, MAX_ERROR);
TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(360.0), 2.0 * M_PI, MAX_ERROR);
TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(90.0), M_PI / 2.0, MAX_ERROR);
}
};
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