CppUnit project page

FAQ

CppUnit home page

---

                     

---

CppUnit::TestFixture Class Reference
[Writing test fixture]

Wraps a test case with setUp and tearDown methods. More...

#include <TestFixture.h>

Inheritance diagram for CppUnit::TestFixture:

List of all members.

Public Methods
virtual	~TestFixture ()
virtual void	setUp ()
	\brief Set up context before running a test. More...
virtual void	tearDown ()
	Clean up after the test run. More...

---

Detailed Description

Wraps a test case with setUp and tearDown methods.

A TestFixture is used to provide a common environment for a set of test cases.

To define a test fixture, do the following:

• implement a subclass of TestCase
• the fixture is defined by instance variables
• initialize the fixture state by overriding setUp (i.e. construct the instance variables of the fixture)
• clean-up after a test by overriding tearDown.

Each test runs in its own fixture so there can be no side effects among test runs. Here is an example:

 class MathTest : public CppUnit::TestFixture {
 protected:
   int m_value1, m_value2;

 public:
   MathTest() {}

   void setUp () {
     m_value1 = 2;
     m_value2 = 3;
   }
 }

For each test implement a method which interacts with the fixture. Verify the expected results with assertions specified by calling CPPUNIT_ASSERT on the expression you want to test:

 public: 
   void testAdd () {
     int result = m_value1 + m_value2;
     CPPUNIT_ASSERT( result == 5 );
   }

Once the methods are defined you can run them. To do this, use a TestCaller.

 CppUnit::Test *test = new CppUnit::TestCaller<MathTest>( "testAdd", 
                                                          &MathTest::testAdd );
 test->run();

The tests to be run can be collected into a TestSuite.

 public: 
   static CppUnit::TestSuite *MathTest::suite () {
      CppUnit::TestSuite *suiteOfTests = new CppUnit::TestSuite;
      suiteOfTests->addTest(new CppUnit::TestCaller<MathTest>(
                              "testAdd", &MathTest::testAdd));
      suiteOfTests->addTest(new CppUnit::TestCaller<MathTest>(
                              "testDivideByZero", &MathTest::testDivideByZero));
      return suiteOfTests;
  }

A set of macros have been created for convenience. They are located in HelperMacros.h.

See also:

TestResult, TestSuite, TestCaller, , CPPUNIT_TEST_SUB_SUITE, CPPUNIT_TEST, CPPUNIT_TEST_SUITE_END, , CPPUNIT_TEST_SUITE_REGISTRATION, CPPUNIT_TEST_EXCEPTION, CPPUNIT_TEST_FAIL.

---

Constructor & Destructor Documentation

virtual CppUnit::TestFixture::~TestFixture (    )  [inline, virtual]

---

Member Function Documentation

virtual void CppUnit::TestFixture::setUp (    )  [inline, virtual]

\brief Set up context before running a test. Reimplemented in CppUnit::TestCaller.

virtual void CppUnit::TestFixture::tearDown (    )  [inline, virtual]

Clean up after the test run. Reimplemented in CppUnit::TestCaller.

---

The documentation for this class was generated from the following file:

• TestFixture.h

---

hosts this site.

Send comments to: CppUnit Developers