public void LessThanExprPropertyValueShouldBeComparable()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(new object());
var lessThanExpression = ExpressionNode.LessThanValue(viewModelProperty, 2);
// Act
var taskResult = lessThanExpression.Evaluate(new CancellationToken());
taskResult.Start();
try
{
// to throw eventual exceptions
taskResult.Wait();
}
catch (AggregateException ae)
{
ae.Flatten().Handle(ex =>
{
if (ex is InvalidOperationException)
{
throw ex;
}
return(false);
});
}
}
public void GreaterThanExprShouldNotAllowComparingDifferentTypes()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(10);
var greaterThanExpression = ExpressionNode.GreaterThanValue(viewModelProperty, "NotAllowedValue");
// Act
var taskResult = greaterThanExpression.Evaluate(new CancellationToken());
taskResult.Start();
try
{
// to throw eventual exceptions
taskResult.Wait();
}
catch (AggregateException ae)
{
ae.Flatten().Handle(ex =>
{
if (ex is ArgumentException)
{
throw ex;
}
return(false);
});
}
// Verify
}
public void GreaterThanExprShouldNotAllowNullOperands()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(null);
var greaterThanExpression = ExpressionNode.GreaterThanValue(viewModelProperty, null);
// Act
var taskResult = greaterThanExpression.Evaluate(new CancellationToken());
taskResult.Start();
try
{
// to throw eventual exceptions
taskResult.Wait();
}
catch (AggregateException ae)
{
ae.Flatten().Handle(ex =>
{
if (ex is InvalidOperationException)
{
throw ex;
}
return(false);
});
}
}
public void EqualToNullExprCanEvaluate()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(new object());
var equalsToExpression = ExpressionNode.EqualToValue(viewModelProperty, null);
// Act
var taskResult = equalsToExpression.Evaluate(new CancellationToken());
taskResult.RunSynchronously();
// Verify
Assert.IsFalse(taskResult.Result);
}
public void CanEvaluateCustomValidationExpression()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(string.Empty);
var customValidationExpression = ExpressionNode.CustomValidation(viewModelProperty, (value, token) => String.IsNullOrEmpty(value as string));
// Act
var taskResult = customValidationExpression.Evaluate(new CancellationToken());
taskResult.RunSynchronously();
// Verify
Assert.IsTrue(taskResult.Result);
}
public void CanEvaluateMatchingExpression()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty("Chuck Norris");
var matchingExpression = ExpressionNode.MatchingProperty(viewModelProperty, "^(Ch)"); // expressions that starts with 'Ch'
// Act
var taskResult = matchingExpression.Evaluate(new CancellationToken());
taskResult.RunSynchronously();
// Verify
Assert.IsTrue(taskResult.Result);
}
public void LessThanExprCanEvaluate()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(10);
var lessThanExpression = ExpressionNode.LessThanValue(viewModelProperty, 5);
// Act
var taskResult = lessThanExpression.Evaluate(new CancellationToken());
taskResult.RunSynchronously();
// Verify
Assert.IsFalse(taskResult.Result);
}
public void EqualToNullOrEmptyExprCanEvaluate()
{
// Prepare
var viewModelProperty = new FakeViewModelProperty(string.Empty);
var equalsToExpression = ExpressionNode.EqualToValue(viewModelProperty, "");
// Act
var taskResult = equalsToExpression.Evaluate(new CancellationToken());
taskResult.RunSynchronously();
// Verify
Assert.IsTrue(taskResult.Result);
}
public void EqualToLateValueExprCanEvaluate()
{
// Prepare
int[] dynamicValue = { 5 };
var viewModelProperty = new FakeViewModelProperty(10);
var equalsToExpression = ExpressionNode.EqualToLateValue(viewModelProperty, () => dynamicValue[0]);
// Act
dynamicValue[0] = 10;
var taskResult = equalsToExpression.Evaluate(new CancellationToken());
taskResult.RunSynchronously();
// Verify
Assert.IsTrue(taskResult.Result);
}
