public void TestValidate()
{
ExprCaseNode caseNode = SupportExprNodeFactory.MakeCaseSyntax1Node();
caseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
caseNode = SupportExprNodeFactory.MakeCaseSyntax2Node();
caseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
// No subnodes: Exception is thrown.
TryInvalidValidate(new ExprCaseNode(false));
TryInvalidValidate(new ExprCaseNode(true));
// singe child node not possible, must be 2 at least
caseNode = new ExprCaseNode(false);
caseNode.AddChildNode(new SupportExprNode(4));
TryInvalidValidate(caseNode);
// in a case 1 expression (e.g. case when a=b then 1 else 2) the when child nodes must return boolean
caseNode.AddChildNode(new SupportExprNode(2));
TryInvalidValidate(caseNode);
// in a case 2 expression (e.g. case a when b then 1 else 2) then a and b types must be comparable
caseNode = new ExprCaseNode(true);
caseNode.AddChildNode(new SupportExprNode("a"));
caseNode.AddChildNode(new SupportExprNode(1));
caseNode.AddChildNode(new SupportExprNode(2));
TryInvalidValidate(caseNode);
}
public void TestEvaluate()
{
ExprCaseNode caseNode = SupportExprNodeFactory.MakeCaseSyntax1Node();
caseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
Assert.AreEqual("a", caseNode.Evaluate(new EvaluateParams(MakeEvent(1), false, null)));
Assert.AreEqual("b", caseNode.Evaluate(new EvaluateParams(MakeEvent(2), false, null)));
Assert.AreEqual("c", caseNode.Evaluate(new EvaluateParams(MakeEvent(3), false, null)));
caseNode = SupportExprNodeFactory.MakeCaseSyntax2Node();
caseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
Assert.AreEqual("a", caseNode.Evaluate(new EvaluateParams(MakeEvent(1), false, null)));
Assert.AreEqual("b", caseNode.Evaluate(new EvaluateParams(MakeEvent(2), false, null)));
Assert.AreEqual("c", caseNode.Evaluate(new EvaluateParams(MakeEvent(3), false, null)));
}
private void TryInvalidValidate(ExprCaseNode exprCaseNode)
{
try {
exprCaseNode.Validate(SupportExprValidationContextFactory.MakeEmpty(_container));
Assert.Fail();
}
catch (ExprValidationException)
{
// expected
}
}