public void MustUseSameInstanceForAllOperations()
{
var first = true;
var operation = operationMock.Object;
IOperation initialize()
{
if (first)
{
first = false;
return(operation);
}
return(new Mock <IOperation>().Object);
};
var sut = new LazyInitializationOperation(initialize);
sut.Perform();
sut.Revert();
operationMock.Verify(o => o.Perform(), Times.Once);
operationMock.Verify(o => o.Revert(), Times.Once);
}
public void MustNotInstantiateOperationOnRevert()
{
IOperation initialize()
{
return(operationMock.Object);
};
var sut = new LazyInitializationOperation(initialize);
sut.Revert();
}
public void MustReturnCorrectOperationResult()
{
IOperation initialize()
{
return(operationMock.Object);
};
operationMock.Setup(o => o.Perform()).Returns(OperationResult.Success);
operationMock.Setup(o => o.Revert()).Returns(OperationResult.Failed);
var sut = new LazyInitializationOperation(initialize);
var perform = sut.Perform();
var revert = sut.Revert();
Assert.AreEqual(OperationResult.Success, perform);
Assert.AreEqual(OperationResult.Failed, revert);
}
public void MustInstantiateOperationOnPerform()
{
var initialized = false;
IOperation initialize()
{
initialized = true;
return(operationMock.Object);
};
var sut = new LazyInitializationOperation(initialize);
sut.Perform();
Assert.IsTrue(initialized);
}
public void MustCorrectlyHandleEventSubscription()
{
IOperation initialize()
{
return(operationMock.Object);
};
var actionRequired = 0;
var actionRequiredHandler = new ActionRequiredEventHandler(args => actionRequired++);
var statusChanged = 0;
var statusChangedHandler = new StatusChangedEventHandler(t => statusChanged++);
var sut = new LazyInitializationOperation(initialize);
sut.ActionRequired += actionRequiredHandler;
sut.StatusChanged += statusChangedHandler;
sut.Perform();
operationMock.Raise(o => o.ActionRequired += null, new Mock <ActionRequiredEventArgs>().Object);
operationMock.Raise(o => o.StatusChanged += null, default(TextKey));
Assert.AreEqual(1, actionRequired);
Assert.AreEqual(1, statusChanged);
sut.ActionRequired -= actionRequiredHandler;
sut.StatusChanged -= statusChangedHandler;
operationMock.Raise(o => o.ActionRequired += null, new Mock <ActionRequiredEventArgs>().Object);
operationMock.Raise(o => o.StatusChanged += null, default(TextKey));
Assert.AreEqual(1, actionRequired);
Assert.AreEqual(1, statusChanged);
sut.ActionRequired += actionRequiredHandler;
sut.StatusChanged += statusChangedHandler;
operationMock.Raise(o => o.ActionRequired += null, new Mock <ActionRequiredEventArgs>().Object);
operationMock.Raise(o => o.StatusChanged += null, default(TextKey));
Assert.AreEqual(2, actionRequired);
Assert.AreEqual(2, statusChanged);
}
