public void Can_Read_Case_Switch_Expression()
{
// setup
var tokenizer = NewTokenizer("CASE A.Field1 WHEN 1 THEN 'Y' WHEN 2 THEN 'N' ELSE 'U' END");
tokenizer.ReadNextToken();
ExpressionParser parser = new ExpressionParser(tokenizer);
// exercise
Expression expression = parser.Execute();
// verify
Assert.IsNotNull(expression);
Assert.IsTrue(expression is CaseSwitchExpression);
CaseSwitchExpression caseSwitch = (CaseSwitchExpression)expression;
Assert.AreEqual("A.Field1", caseSwitch.Switch.Value);
Assert.AreEqual(2, caseSwitch.Cases.Count);
Assert.AreEqual("1", caseSwitch.Cases[0].When.Value);
Assert.AreEqual("'Y'", caseSwitch.Cases[0].Then.Value);
Assert.AreEqual("2", caseSwitch.Cases[1].When.Value);
Assert.AreEqual("'N'", caseSwitch.Cases[1].Then.Value);
Assert.AreEqual("'U'", caseSwitch.Else.Value);
}
private Expression GetCaseSwitchExpression(Expression parent)
{
CaseSwitchExpression result = new CaseSwitchExpression(parent);
result.Switch = ReadCriteriaList(result);
ParseCaseExpression(result);
return(result);
}
