### Question:
LienzoLayer { public LienzoLayer delete(final IPrimitive<?> shape) { layer.remove(shape); return this; } LienzoLayer();   LienzoLayer(final LienzoCustomLayer layer); void setSkipDraw(final boolean skipDraw); LienzoLayer add(final IPrimitive<?> shape); LienzoLayer delete(final IPrimitive<?> shape); void clear(); void onAfterDraw(final Command callback); Layer getTopLayer(); void add(final Layer layer); boolean isReady(); void remove(final Layer layer); void destroy(); Layer getLienzoLayer(); org.kie.workbench.common.stunner.core.client.canvas.Transform getTransform(); void translate(final double tx,
                          final double ty); void scale(final double sx,
                      final double sy); void scale(final double delta);  }### Answer:
@Test public void testDelete() { tested.delete(shape); verify(layer, times(1)).remove(eq(shape)); }