public void EvaluateNameWithNull()
{
NameExpression expression = new NameExpression("foo");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("foo", null);
Assert.IsNull(expression.Evaluate(environment));
}
public void EvaluateNameExpression()
{
NameExpression expression = new NameExpression("foo");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("foo", "bar");
Assert.AreEqual("bar", expression.Evaluate(environment));
}
public void RaiseIfNameIsUndefined()
{
NameExpression expression = new NameExpression("foo");
BindingEnvironment environment = new BindingEnvironment();
try
{
expression.Evaluate(environment);
Assert.Fail("Exception expected");
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(NameError));
Assert.AreEqual("name 'foo' is not defined", ex.Message);
}
}