public void PinchInProgress_is_true_when_pinch_begins()
{
var recognizer = new PlatformPinchRecognizerStub(new object());
recognizer.OnPinchingBegan(0, 0);
recognizer.PinchInProgress.Should().BeTrue("since the pinch has begun");
}
public void PinchInProgress_is_false_when_pinch_state_changed(GestureState state)
{
var recognizer = new PlatformPinchRecognizerStub(new object());
recognizer.OnPinchingBegan(0, 0);
recognizer.OnPinchingStateChanged(state);
recognizer.PinchInProgress.Should().BeFalse("since the pinch state changed");
}
public void OnPinchingBegan_throws_if_pinch_already_in_progress()
{
var recognizer = new PlatformPinchRecognizerStub(new object());
recognizer.OnPinchingBegan(0, 0);
Assert.Throws <InvalidOperationException>(() => recognizer.OnPinchingBegan(0, 0));
}
public void Pinching_emits_when_OnPinchingStateChanged_invoked()
{
var recognizer = new PlatformPinchRecognizerStub(new object());
var pinch = default(PinchEvent);
recognizer.Pinching.Skip(1).Take(1).Subscribe(ev => pinch = ev);
recognizer.OnPinchingBegan(0, 0);
recognizer.OnPinchingStateChanged(GestureState.Ended);
pinch.State.Should().Be(GestureState.Ended, "because pinching state changed");
}
public void Pinching_emits_when_OnPinchingBegan_invoked()
{
var recognizer = new PlatformPinchRecognizerStub(new object());
var pinch = default(PinchEvent);
recognizer.Pinching.Take(1).Subscribe(ev => pinch = ev);
recognizer.OnPinchingBegan(1, 2);
pinch.State.Should().Be(GestureState.Began, "because pinching began");
pinch.Origin.X.Should().Be(1);
pinch.Origin.Y.Should().Be(2);
}
public void OnPinchingStateChanged_throws_if_pinch_not_in_progress()
{
var recognizer = new PlatformPinchRecognizerStub(new object());
Assert.Throws <InvalidOperationException>(() => recognizer.OnPinchingStateChanged(GestureState.Ended));
}