implement parameterized tests

This allows to execute the same test with different parameters and
treats each execution as an own test. The change consists of two parts,
the TestCaller can now handle any callable which also makes it easy to
generate programatically more complex test cases as well as the new
CPPUNIT_TEST_PARAMETERIZED macro. That macro takes the test name as well
as an iteratable, e.g. std::initializer_list.

An example for this usage is:

class SimpleTest : public CppUnit::TestFixture
{
public:
    CPPUNIT_TEST_SUITE(SimpleTest);
    CPPUNIT_TEST_PARAMETERIZED(test, {1, 2, 3, 4});
    CPPUNIT_TEST_SUITE_END();

    void test(int i)
    {
        CPPUNIT_ASSERT(i < 5);
    }
};

which will execute test 4 times with the values 1 to 4.

1 files changed, 23 insertions, 0 deletions

diff --git a/examples/cppunittest/HelperMacrosTest.cpp b/examples/cppunittest/HelperMacrosTest.cpp
index 4e83b81..2cdd3a7 100644
--- a/examples/cppunittest/HelperMacrosTest.cpp
+++ b/examples/cppunittest/HelperMacrosTest.cpp
@@ -77,6 +77,19 @@ public:
   }
 };
 
+class ParameterizedTestFixture : public CPPUNIT_NS::TestFixture
+{
+    CPPUNIT_TEST_SUITE(ParameterizedTestFixture);
+    CPPUNIT_TEST_PARAMETERIZED(testMethod, {1, 2, 3, 4});
+    CPPUNIT_TEST_SUITE_END();
+
+public:
+
+    void testMethod(int /*val*/)
+    {
+    }
+};
+
 
 #undef TEST_ADD_N_MOCK
 #define TEST_ADD_N_MOCK( totalCount )                                              \
@@ -225,3 +238,13 @@ HelperMacrosTest::testAddTest()
   suite->run( m_result );
   m_testListener->verify();
 }
+
+void
+HelperMacrosTest::testParameterizedTests()
+{
+  std::unique_ptr<CPPUNIT_NS::TestSuite> suite( ParameterizedTestFixture::suite() );
+  m_testListener->setExpectedStartTestCall(4);
+  m_testListener->setExpectedAddFailureCall( 0 );
+  suite->run(m_result);
+  m_testListener->verify();
+}