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PropertyChangedAssertionsRaised_PropertyChanged Method (SmartAssertPlaceHolder)

Creates an Assertion that ensure an object property/indexer changed to a different value in the Act part of your test.

Namespace:  SmartTests.Assertions
Assembly:  SmartTests (in SmartTests.dll) Version: 1.12.0
Syntax
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public static Assertion Raised_PropertyChanged(
	this SmartAssertPlaceHolder _
)

Parameters

_
Type: SmartTestsSmartAssertPlaceHolder
The dummy place holder for all Smart Assertions.

Return Value

Type: Assertion
The newly created Assertion.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type SmartAssertPlaceHolder. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Exceptions
ExceptionCondition
BadTestException

If the instance is null or the property/indexer cannot be inferred from the Act.

If the value of the property before the Act is the value involved in the Act.

SmartTestException

If the INotifyPropertyChanged event is not raised.

If PropertyName is not the involved property in Act.

If the current value of the property is not the involved value in Act during the Act or after the Act.

Remarks
This Assertion ensures that:
  1. Before the Act -

    The value of the property/indexer IS NOT the value of the Act; otherwise a BadTestException is thrown.

  2. During the Act -

    Ensures the PropertyChanged event is raised.

    The PropertyName is the name of the property of the Act; otherwise a SmartTestException is thrown.

    The value of the property/indexer in the PropertyChanged handler is the one involved in the Act; otherwise a SmartTestException is thrown.

  3. After the Act -

    If the event was not raised, a SmartTestException is thrown.

    The value of the property/indexer is the one involved in the Act; otherwise a SmartTestException is thrown.

Examples

In this example, the Smart Assertion verifies that the PropertyChanged event is raised for the property MyProperty and the value is 10.

It also ensures that the value is still 10 after the Act.

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[Test]
public void MyMethodTest()
{
    var mc = new MyClass();
    RunTest( ValidValue.IsValid,
             Assign( () => mc.MyProperty, 10 ),
             SmartAssert.Raised_PropertyChanged() );
}
See Also