public void SimplePropertyUsage()
{
var stub = new StubExample();
IExample example = stub;
// you can use the property the same whether the interface has a getter, a setter, or both.
stub.PropertyWithGetter = 12;
stub.PropertyWithGetAndSet = 3.0;
// from the interface, everything works as expected
Assert.Equal(12, example.PropertyWithGetter);
Assert.Equal(3.0, example.PropertyWithGetAndSet);
}
public void AdvancedEventAdd()
{
var stub = new StubExample();
IExample example = stub;
// you can use ".handlers" to modify the list of registered handlers
int count = 0;
stub.SimpleEvent.add = handler => { stub.SimpleEvent.handlers.Add(handler); count++; };
example.SimpleEvent += (sender, e) => { };
Assert.Equal(1, count);
}
public void IndexerPropertyUsage()
{
var stub = new StubExample();
IExample example = stub;
// since the indexer property has arguments, it's exposed as get_Item and set_Item separately.
stub.get_Item = index => { return("No Value"); };
// note that set_Item has one additional parameter: the value being set
stub.set_Item = (index, value) => { /* put useful code here */ };
Assert.Equal("No Value", example[12]);
// note that for normal properties, there is a default backing storage (.value) included.
// but for index properties, there is no such default storage.
// if you want your stub to be able to share data between get_Item and set_Item, you have to designate everything yourself.
}
public void AdvancedEventRemove()
{
var stub = new StubExample();
IExample example = stub;
// you can use ".handlers" to modify the list of registered handlers
int count = 0;
stub.SimpleEvent.remove = handler => { stub.SimpleEvent.handlers.Remove(handler); count++; };
void Handler(object sender, EventArgs e)
{
}
example.SimpleEvent -= Handler; // just like with standard events, removing something that isn't there doesn't error.
Assert.Equal(1, count);
}
public void SimpleEventUsage()
{
var stub = new StubExample();
IExample example = stub;
// you can add and remove handlers like normal
int count = 0;
stub.SimpleEvent += (sender, e) => count++;
// you can invoke the event like you would from within the stub
stub.SimpleEvent.Invoke(stub, EventArgs.Empty);
Assert.Equal(1, count);
// you can access all the handlers that have been added.
Assert.Single(stub.SimpleEvent.handlers);
}
public void OutAndRefMethodUsage()
{
var stub = new StubExample();
IExample example = stub;
// IExample has an out method named "OutMethod(int, out int)"
// in the stub, methods with out or ref parameters are exposed using the method name suffixed with the parameter types.
// also, lambas using out/ref parameters require full types specificied for the parameters.
stub.OutMethod_int_int = (int input, out int output) => { output = input + 2; };
int number;
example.OutMethod(5, out number);
Assert.Equal(7, number);
// ref params work the same way.
stub.RefMethod_int_string = (int input, ref string reference) => true;
}
public void SimpleMethodUsageStub()
{
var stub = new StubExample();
IExample example = stub;
// setup a method by assigning a function to that method
stub.VoidMethod = () => { };
// you can even call the method the normal way from the stub.
stub.VoidMethod();
// methods that return something are setup in the same way
stub.StructMethod = () => 7;
var result = stub.StructMethod();
Assert.Equal(7, result);
Assert.Equal(7, example.StructMethod());
}
public void EventHandlerArgsComparison()
{
var stub = new StubExample();
IExample example = stub;
// for generic events, ".handlers" is a collection of EventHandler<T>.
EventHandler <AssemblyLoadEventArgs> handler1 = stub.GenericEvent.handlers.FirstOrDefault();
// for custom event classes, ".handlers" is _still_ a collection of EventHandler<T>.
EventHandler <UnhandledExceptionEventArgs> handler2 = stub.SpecificEvent.handlers.FirstOrDefault();
// even simple EventHandler objects use a collection of EventHandler<T>.
EventHandler <EventArgs> handler3 = stub.SimpleEvent.handlers.FirstOrDefault();
// internally, AutoImplement does the conversion to the appropriate eventhandler type used by the interface.
// the biggest limitation here is that any event implemented by auto-implement:
// - the event must have exactly two parameters
// - the first parameter must be of type object.
}
public void GenericMethodUsage()
{
var stub = new StubExample();
IExample example = stub;
stub.ImplementGenericMethod <int>(() => 5);
stub.ImplementGenericMethod <string>(() => "bob");
Assert.Equal(5, example.GenericMethod <int>());
Assert.Equal("bob", example.GenericMethod <string>());
// if no implementation is assigned, default values are used when needed.
Assert.Equal(default(double), example.GenericMethod <double>());
Assert.Equal(default(bool), example.GenericMethod <bool>());
// if you want to make a more complete implementation that works for any generic parameter,
// put your custom implementation in a decorator and then wrap the stub with that decorator.
// This DOES require making a custom class, but there's no other way to make a generic-parameterized method:
// you can't use a lambda or pass in a delegate.
}
public void AdvancedPropertySetterUsage()
{
var stub = new StubExample();
IExample example = stub;
// you can use ".set" to assign a custom set accessor
int callCount = 0;
stub.PropertyWithSetter.set = value => { callCount++; };
example.PropertyWithSetter = true;
Assert.Equal(1, callCount);
// you can set the value for the default getter using ".value"
stub.PropertyWithGetAndSet.set = value => stub.PropertyWithGetAndSet.value = value + 1;
example.PropertyWithGetAndSet = 3.8;
Assert.Equal(4.8, example.PropertyWithGetAndSet);
}
public void AdvancedPropertyGetterUsage()
{
var stub = new StubExample();
IExample example = stub;
// you can use ".get" to assign a custom get accessor
int callCount = 0;
stub.PropertyWithGetter.get = () => { callCount++; return(12); };
Assert.Equal(12, example.PropertyWithGetter);
Assert.Equal(1, callCount);
// you can get the value from the default setter using ".value"
stub.PropertyWithGetAndSet.get = () => stub.PropertyWithGetAndSet.value + 1;
example.PropertyWithGetAndSet = 3.8;
Assert.Equal(4.8, example.PropertyWithGetAndSet);
}
