}
@Test
public void testAddsDrawingToCache() {
ClientCanvas clientCanvas = new ClientCanvas( shell, SWT.NONE );
ClientDrawListener drawListener = mock( ClientDrawListener.class );
clientCanvas.addClientDrawListener( drawListener );
ClientCanvasOperator operator = new ClientCanvasOperator( clientCanvas );
environment.newRequest();
JsonObject drawings = new JsonObject();
drawings.add( ClientCanvasOperator.DRAWINGS_PROPERTY, JsonValue.valueOf( ClientCanvasTestUtil.createDrawings( 1 ) ) );