diff tests/TestMathUtilities.cpp @ 348:50fae18236ee

Some (but not all) MathUtilities unit tests, and accompanying fixes

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/TestMathUtilities.cpp	Fri Oct 04 18:34:30 2013 +0100
@@ -0,0 +1,138 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+#include "maths/MathUtilities.h"
+
+#include <cmath>
+
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_MAIN
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(TestMathUtilities)
+
+BOOST_AUTO_TEST_CASE(round)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::round(0.5), 1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(0.49), 0.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(0.99), 1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(0.01), 0.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(0.0), 0.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(100.0), 100.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(-0.2), 0.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(-0.5), -1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(-0.99), -1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(-1.0), -1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(-1.1), -1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::round(-1.5), -2.0);
+}
+
+BOOST_AUTO_TEST_CASE(mean)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::mean(0, 0), 0);
+    double d0[] = { 0, 4, 3, -1 };
+    BOOST_CHECK_EQUAL(MathUtilities::mean(d0, 4), 1.5);
+    double d1[] = { -2.6 };
+    BOOST_CHECK_EQUAL(MathUtilities::mean(d1, 1), -2.6);
+    std::vector<double> v;
+    v.push_back(0);
+    v.push_back(4);
+    v.push_back(3);
+    v.push_back(-1);
+    BOOST_CHECK_EQUAL(MathUtilities::mean(v, 0, 4), 1.5);
+    BOOST_CHECK_EQUAL(MathUtilities::mean(v, 1, 2), 3.5);
+    BOOST_CHECK_EQUAL(MathUtilities::mean(v, 3, 1), -1);
+    BOOST_CHECK_EQUAL(MathUtilities::mean(v, 3, 0), 0);
+}
+
+BOOST_AUTO_TEST_CASE(sum)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::sum(0, 0), 0);
+    double d0[] = { 0, 4, 3, -1 };
+    BOOST_CHECK_EQUAL(MathUtilities::sum(d0, 4), 6);
+    double d1[] = { -2.6 };
+    BOOST_CHECK_EQUAL(MathUtilities::sum(d1, 1), -2.6);
+}
+
+BOOST_AUTO_TEST_CASE(median)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::median(0, 0), 0);
+    double d0[] = { 0, 4, 3, -1 };
+    BOOST_CHECK_EQUAL(MathUtilities::median(d0, 4), 1.5);
+    double d1[] = { 0, 4, 3, -1, -1 };
+    BOOST_CHECK_EQUAL(MathUtilities::median(d1, 5), 0);
+    double d2[] = { 1.0, -2.0 };
+    BOOST_CHECK_EQUAL(MathUtilities::median(d2, 2), -0.5);
+    double d3[] = { -2.6 };
+    BOOST_CHECK_EQUAL(MathUtilities::median(d3, 1), -2.6);
+}
+
+BOOST_AUTO_TEST_CASE(princarg)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(M_PI), M_PI);
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(-M_PI), M_PI);
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(2 * M_PI), 0.0);
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(5 * M_PI), M_PI);
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(1.0), 1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(-1.0), -1.0);
+    BOOST_CHECK_EQUAL(MathUtilities::princarg(-10.0), -10.0 + 4 * M_PI);
+}
+
+BOOST_AUTO_TEST_CASE(isPowerOfTwo)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(0), false);
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(1), true);
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(-2), false);
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(2), true);
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(3), false);
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(12), false);
+    BOOST_CHECK_EQUAL(MathUtilities::isPowerOfTwo(16), true);
+}
+
+BOOST_AUTO_TEST_CASE(nextPowerOfTwo)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(0), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(1), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(-2), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(2), 2);
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(3), 4);
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(12), 16);
+    BOOST_CHECK_EQUAL(MathUtilities::nextPowerOfTwo(16), 16);
+}
+
+BOOST_AUTO_TEST_CASE(previousPowerOfTwo)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(0), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(1), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(-2), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(2), 2);
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(3), 2);
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(12), 8);
+    BOOST_CHECK_EQUAL(MathUtilities::previousPowerOfTwo(16), 16);
+}
+
+BOOST_AUTO_TEST_CASE(nearestPowerOfTwo)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(0), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(1), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(-2), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(2), 2);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(3), 4);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(11), 8);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(12), 16);
+    BOOST_CHECK_EQUAL(MathUtilities::nearestPowerOfTwo(16), 16);
+}
+
+BOOST_AUTO_TEST_CASE(factorial)
+{
+    BOOST_CHECK_EQUAL(MathUtilities::factorial(-10), 0);
+    BOOST_CHECK_EQUAL(MathUtilities::factorial(0), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::factorial(1), 1);
+    BOOST_CHECK_EQUAL(MathUtilities::factorial(2), 2);
+    BOOST_CHECK_EQUAL(MathUtilities::factorial(3), 6);
+    BOOST_CHECK_EQUAL(MathUtilities::factorial(4), 24);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+