@Test public void dropRequiresDragStart() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a2.addDragOverHandler(e -> { }); try { a2.drop(); fail(); } catch (IllegalStateException ise) { assertThat(ise.getMessage(), is("No stub dragStart() was called")); } }
@Test public void dropRequiresLastDragOverToBeCanceled() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a2.addDragOverHandler(e -> { }); a1.dragStart(); a2.dragOver(); try { a2.drop(); fail(); } catch (IllegalStateException ise) { assertThat(ise.getMessage(), is("addDragOverHandler should call preventDefault() if it wants to drop")); } }
@Test public void dropHandlerShouldPreventDefault() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a2.addDragOverHandler(e -> { e.preventDefault(); }); a1.dragStart(); a2.dragOver(); try { a2.drop(); fail(); } catch (IllegalStateException ise) { assertThat(ise.getMessage(), is("addDropHandler should call preventDefault()")); } }
@Test public void dropCallsDragEnd() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); boolean[] ended = { false }; a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a1.addDragEndHandler(e -> ended[0] = true); a2.addDragOverHandler(e -> { e.preventDefault(); }); a2.addDropHandler(e -> { e.preventDefault(); }); a1.dragStart(); a2.drop(); assertThat(ended[0], is(true)); }
@Test public void dataIsPassedToDrop() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); boolean[] ended = { false }; a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a1.addDragEndHandler(e -> ended[0] = true); a2.addDragOverHandler(e -> { e.preventDefault(); }); a2.addDropHandler(e -> { assertThat(e.getData("text/plain"), is("foo")); e.preventDefault(); }); a1.dragStart(); a2.drop(); } }
@Test public void dropImplicitlyCallsOverIfNotExplicitlyCalled() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a2.addDragOverHandler(e -> { e.preventDefault(); }); a2.addDropHandler(e -> { e.preventDefault(); }); a1.dragStart(); // no explicit dragOver // a2.dragOver(); a2.drop(); }
@Test public void successfulDragAndDrop() { StubAnchor a1 = new StubAnchor(); StubAnchor a2 = new StubAnchor(); a1.addDragStartHandler(e -> e.setData("text/plain", "foo")); a2.addDragOverHandler(e -> { e.preventDefault(); }); a2.addDropHandler(e -> { e.preventDefault(); }); a1.dragStart(); a2.dragOver(); a2.drop(); }