Re: [Cppunit-devel] Parameterizing tests by using XML

[FUKUDA F. <ff...@nt...>]

Hi.

--- "[Cppunit-devel] Parameterizing tests by using XML" / Steffen Huebner / 2002/07/18 16:07:43 +0200 ---
>I have looked over CppUnit the last time to find a way making tests more 
>flexible by parameterizing them.
>The idea is to place input parameters and corresponding expected values in a XML file. 
>That forces to parse the incoming XML file.
>...

I'm now trying this. 

- format of testdata(XML) is identical to JTestCase (http://jtestcase.sourceforge.net/)

<tests>
  <class name="CalculatorTest">
    <!-- Sample global params --> 
    <params>
      <param name="gVar1" type="double">10</param>
      <param name="gVar2" type="int">30</param>
    </params>
    <!-- params & asserts for CalculatorTest::testCalculate() -->
    <method name="testCalculate" test-case="positive-add">
      <!-- expected: 10 + 20 = 30 -->
      <params>
        <param name="var1" type="int">10</param>
        <param name="var2" type="int">20</param>
        <param name="opt">+</param>
      </params>
      <asserts>
        <assert name="result" type="int" action="EQUALS">30</assert>
      </asserts>
    </method>
    <!--- and so on -->
  </class>
</tests>

... and I made class: TextContext/TestContextProxy.
you can use as follows:

class CalculatorTest : public CppUnit::TestFixture {
  CPPUNIT_TEST_SUITE(CalculatorTest);
  CPPUNIT_TEST(testCalculate);
  CPPUNIT_TEST_SUITE_END();
private:

  TestContext* tc_;

  static int atoi(const std::string& str) {
    int result;
    std::istringstream strm(str);
    strm >> result;
    return result;
  }

public:

  virtual void setUp() {
    // load an XML & set the name of class
    tc_ = new XercesTestContext("../data/testcase.xml", "CalculatorTest");
  }
  virtual void tearDown()
    { delete tc_; }

  void testCalculate() {
    // make a proxy from TestContext & name of method
    TestContextProxy proxy(tc_,"testCalculate");
    // enumerate params/asserts 
    while ( proxy.advance() ) {
      // extract params
      TestContext::params_type params = proxy.getTestCaseParams();
      int x = atoi(params["var1"]);
      int y = atoi(params["var2"]);
      char op = params["opt"][0];
      // execute
      Calculator c;
      int result = c.calculate(x,y,op);
      // verify!
      CPPUNIT_ASSERT_CONTEXTPROXY(proxy, "result", result);
    }
  }
};

sounds good? ;-)

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FUKUDA (episteme) Fumiki -- magical, but never a magic...