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NotChangedAssertionsNotChangedExceptT Method (SmartAssertPlaceHolder, ExpressionFuncT, NotChangedKind)

Creates an Assertion that ensure object properties/fields of the specified instance did not change, except the specified ones, in the Act part of your test.

Namespace:  SmartTests.Assertions
Assembly:  SmartTests (in SmartTests.dll) Version: 1.8.0
public static Assertion NotChangedExcept<T>(
	this SmartAssertPlaceHolder this,
	Expression<Func<T>> expression,
	NotChangedKind kind = NotChangedKind.PublicProperties


Type: SmartTestsSmartAssertPlaceHolder
The dummy place holder for all Smart Assertions.
Type: System.Linq.ExpressionsExpressionFuncT
The expression of an instance and a property/field.
kind (Optional)
Type: SmartTests.AssertionsNotChangedKind
The kind of members and visibility to check for changes. Default value is PublicProperties.

Type Parameters

The Type of the expression that can change.

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).
SmartTestException If any property/field checked (see kind) of the instance in expression, except the property/field in expression has changed.
This Assertion ensures that:
  1. Before the Act -

    Nothing special.

  2. After the Act -

    If a property/field of the instance in expression changed during the Act (except the property/field in expression), a SmartTestException is thrown.

In this example, the Smart Assertion verifies that no property nor field of other, except CopyCount, changed while calling CopyPropertiesFrom.
public void CopyPropertiesFromTest()
    var mc = new MyClass();
    var other = new MyClass();

    RunTest( ValidValue.IsValid,
             () => mc.CopyPropertiesFrom( other ),
             SmartAssert.NotChangedExcept( () => other.CopyCount, NotChangedKind.All ) );
See Also