### Question:
ScrollbarImpl { public void setPageStepSize(final float pageStepSize) { this.pageStepSize = pageStepSize; }  void bindToView(
      @Nonnull final ScrollbarView view,
      final float value,
      final float worldMax,
      final float worldPageSize,
      final float buttonStepSize,
      final float pageStepSize); void setup(
      final float value,
      final float worldMax,
      final float worldPageSize,
      final float buttonStepSize,
      final float pageStepSize); void setValue(final float value); float getValue(); void stepUp(); void stepDown(); void stepPageUp(); void stepPageDown(); float getWorldMax(); void setWorldMax(final float max); float getWorldPageSize(); void setWorldPageSize(final float worldPageSize); float getButtonStepSize(); void setButtonStepSize(final float buttonStepSize); float getPageStepSize(); void setPageStepSize(final float pageStepSize); void interactionClick(final int viewValueClicked); void interactionMove(final int viewValue); void updateView();  }### Answer:
@Test public void testSetPageStepSize() { replay(view); scrollbar.setPageStepSize(12.f); assertEquals(12.f, scrollbar.getPageStepSize()); }