public void CompileAndEvaluateComplexListExpression()
{
Parser parser = new Parser("[1, 2, [a, b], 'spam']");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("a", 1);
environment.SetValue("b", 2);
IExpression expression = parser.CompileExpression();
Assert.IsNotNull(expression);
Assert.IsInstanceOfType(expression, typeof(ListExpression));
Assert.IsFalse(((ListExpression)expression).IsReadOnly);
object result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(IList));
IList list = (IList)result;
Assert.AreEqual(4, list.Count);
Assert.AreEqual(1, list[0]);
Assert.AreEqual(2, list[1]);
Assert.IsNotNull(list[2]);
Assert.IsInstanceOfType(list[2], typeof(IList));
Assert.AreEqual("spam", list[3]);
IList list2 = (IList)list[2];
Assert.IsNotNull(list2);
Assert.AreEqual(2, list2.Count);
Assert.AreEqual(1, list2[0]);
Assert.AreEqual(2, list2[1]);
}
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 CompileExpressionCommandWithName()
{
Parser parser = new Parser("a+2");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("a", 1);
ICommand command = parser.CompileCommand();
Assert.IsNotNull(command);
Assert.IsInstanceOfType(command, typeof(ExpressionCommand));
command.Execute(environment);
ExpressionCommand exprcommand = (ExpressionCommand)command;
Assert.IsNotNull(exprcommand.Expression);
Assert.AreEqual(3, exprcommand.Expression.Evaluate(environment));
}
public void CompileAndEvaluateListWithExpressionsExpression()
{
Parser parser = new Parser("[a+1, b+2, c]");
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("a", 1);
environment.SetValue("b", 2);
environment.SetValue("c", "spam");
IExpression expression = parser.CompileExpression();
Assert.IsNotNull(expression);
Assert.IsInstanceOfType(expression, typeof(ListExpression));
Assert.IsFalse(((ListExpression)expression).IsReadOnly);
object result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(IList));
IList list = (IList)result;
Assert.AreEqual(3, list.Count);
Assert.AreEqual(2, list[0]);
Assert.AreEqual(4, list[1]);
Assert.AreEqual("spam", list[2]);
}
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);
}
}