public void DefineVariableWithInitialValue()
{
Context context = new Context();
DefineVariableCommand expr = new DefineVariableCommand(null, "a", new ConstantExpression(1));
Assert.AreEqual(1, expr.Execute(context));
Assert.IsTrue(context.HasVariable("a"));
Assert.AreEqual(1, context.GetValue("a"));
Assert.AreEqual("a", expr.Name);
Assert.IsNull(expr.TypeExpression);
}
public void DefineVariableWithTypeAndInitialValue()
{
Context context = new Context();
IExpression typeexpr = new VariableExpression("List");
DefineVariableCommand expr = new DefineVariableCommand(typeexpr, "a", new ConstantExpression(1));
Assert.AreEqual(1, expr.Execute(context));
Assert.IsTrue(context.HasVariable("a"));
Assert.AreEqual(1, context.GetValue("a"));
Assert.AreEqual("a", expr.Name);
Assert.AreEqual(typeexpr, expr.TypeExpression);
}
private ICommand ParseDefineVariableCommand(IExpression typeexpression, string name)
{
DefineVariableCommand command;
if (this.TryParseToken("=", TokenType.Operator))
command = new DefineVariableCommand(typeexpression, name, this.ParseExpression());
else
command = new DefineVariableCommand(typeexpression, name);
this.ParseToken(";", TokenType.Separator);
return command;
}
