TestSuite suite = new TestSuite("Tests for OperationEval concrete implementation classes.");
suite.addTest(new GenericFormulaTestCase("D23"));
suite.addTest(new GenericFormulaTestCase("D27"));
suite.addTest(new GenericFormulaTestCase("D31"));
suite.addTest(new GenericFormulaTestCase("D35"));
suite.addTest(new GenericFormulaTestCase("D39"));
suite.addTest(new GenericFormulaTestCase("D43"));
suite.addTest(new GenericFormulaTestCase("D47"));
suite.addTest(new GenericFormulaTestCase("D51"));
suite.addTest(new GenericFormulaTestCase("D55"));
suite.addTest(new GenericFormulaTestCase("D59"));
suite.addTest(new GenericFormulaTestCase("D63"));
suite.addTest(new GenericFormulaTestCase("D67"));
suite.addTest(new GenericFormulaTestCase("D71"));
suite.addTest(new GenericFormulaTestCase("D75"));
return suite;