From de6b4be8b3e7a46507234b8b89da6b584dd14a40 Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Wed, 2 Aug 2017 13:29:22 +0200
Subject: [PATCH] Test math utilities

---
 CMakeLists.txt      |  1 +
 tests/mathtests.cpp | 78 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 79 insertions(+)
 create mode 100644 tests/mathtests.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5717511..ef5bc36 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,6 +70,7 @@ set(TEST_SRC_FILES
     tests/chronotests.cpp
     tests/argumentparsertests.cpp
     tests/traitstests.cpp
+    tests/mathtests.cpp
 )
 
 set(CMAKE_MODULE_FILES
diff --git a/tests/mathtests.cpp b/tests/mathtests.cpp
new file mode 100644
index 0000000..30f0cb9
--- /dev/null
+++ b/tests/mathtests.cpp
@@ -0,0 +1,78 @@
+#include "../math/math.h"
+#include "../tests/testutils.h"
+
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+using namespace std;
+using namespace MathUtilities;
+using namespace TestUtilities::Literals;
+
+using namespace CPPUNIT_NS;
+
+/*!
+ * \brief The MathTests class tests functions of the MathUtilities namespace.
+ */
+class MathTests : public TestFixture {
+    CPPUNIT_TEST_SUITE(MathTests);
+    CPPUNIT_TEST(testRandom);
+    CPPUNIT_TEST(testDigitsum);
+    CPPUNIT_TEST(testFactorial);
+    CPPUNIT_TEST(testPowerModulo);
+    CPPUNIT_TEST(testInverseModulo);
+    CPPUNIT_TEST(testOrderModulo);
+    CPPUNIT_TEST_SUITE_END();
+
+public:
+    void setUp()
+    {
+    }
+    void tearDown()
+    {
+    }
+
+    void testRandom();
+    void testDigitsum();
+    void testFactorial();
+    void testPowerModulo();
+    void testInverseModulo();
+    void testOrderModulo();
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(MathTests);
+
+void MathTests::testRandom()
+{
+    CPPUNIT_ASSERT_EQUAL(6, random(5, 7));
+}
+
+void MathTests::testDigitsum()
+{
+    CPPUNIT_ASSERT_EQUAL(0, digitsum(0));
+    CPPUNIT_ASSERT_EQUAL(7, digitsum(16));
+    CPPUNIT_ASSERT_EQUAL(1, digitsum(16, 16));
+}
+
+void MathTests::testFactorial()
+{
+    CPPUNIT_ASSERT_EQUAL(6, factorial(3));
+}
+
+void MathTests::testPowerModulo()
+{
+    CPPUNIT_ASSERT_EQUAL(25ul, powerModulo(5, 2, 30));
+    CPPUNIT_ASSERT_EQUAL(5ul, powerModulo(5, 2, 20));
+}
+
+void MathTests::testInverseModulo()
+{
+    CPPUNIT_ASSERT_EQUAL(-12l, inverseModulo(2, 25));
+    CPPUNIT_ASSERT_EQUAL(-8l, inverseModulo(3, 25));
+}
+
+void MathTests::testOrderModulo()
+{
+    CPPUNIT_ASSERT_EQUAL(20ul, orderModulo(2, 25));
+    CPPUNIT_ASSERT_EQUAL(5ul, orderModulo(6, 25));
+    CPPUNIT_ASSERT_EQUAL(0ul, orderModulo(5, 25));
+}