public void GetNativeMethod()
{
AttributeExpression expression = new AttributeExpression(new ConstantExpression(1), "GetType");
BindingEnvironment environment = new BindingEnvironment();
var result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(MethodInfo));
}
public void EvaluateAttributeExpressionOnClassProperty()
{
AttributeExpression expression = new AttributeExpression(new NameExpression("Calculator"), "Value");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("Calculator", typeof(Calculator));
object result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.AreEqual(3, result);
}
public void EvaluateAttributeExpressionOnNativeObjectProperty()
{
AttributeExpression expression = new AttributeExpression(new NameExpression("adam"), "FirstName");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("adam", new Person() { FirstName = "Adam" });
object result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(string));
Assert.AreEqual("Adam", result);
}
public void EvaluateAttributeExpression()
{
AttributeExpression expression = new AttributeExpression(new NameExpression("module"), "foo");
BindingEnvironment environment = new BindingEnvironment();
BindingEnvironment modenv = new BindingEnvironment();
modenv.SetValue("foo", "bar");
environment.SetValue("module", modenv);
object result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(string));
Assert.AreEqual("bar", result);
Assert.IsNotNull(expression.Expression);
Assert.AreEqual("foo", expression.Name);
}
public void RaiseWhenEvaluateAttributeExpression()
{
AttributeExpression expression = new AttributeExpression(new NameExpression("module"), "spam");
BindingEnvironment environment = new BindingEnvironment();
BindingEnvironment modenv = new BindingEnvironment();
environment.SetValue("module", modenv);
try
{
expression.Evaluate(environment);
Assert.Fail("Exception expected");
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(AttributeError));
Assert.AreEqual("'module' object has no attribute 'spam'", ex.Message);
}
}
private IExpression CompileTerm()
{
IExpression term = this.CompileSimpleTerm();
if (term == null)
return null;
while (true)
{
if (this.TryCompile(TokenType.Operator, "."))
term = new AttributeExpression(term, this.CompileName(true).Value);
else if (this.TryCompile(TokenType.Separator, "("))
term = this.CompileCallExpression(term);
else if (TryCompile(TokenType.Separator, "["))
term = this.CompileIndexedExpression(term);
else
break;
}
return term;
}
