Added missing rating test for checkValueChangeEvent.

Author: kevzlou7979

src/test/java/gwt/material/design/addins/client/MaterialRatingTest.java

@@ -21,6 +21,7 @@
 
 import com.google.gwt.event.dom.client.ClickEvent;
 import com.google.gwt.user.client.ui.Widget;
+import gwt.material.design.addins.client.base.AbstractValueWidgetTest;
 import gwt.material.design.addins.client.base.MaterialAddinsTest;
 import gwt.material.design.addins.client.base.constants.AddinsCssName;
 import gwt.material.design.addins.client.rating.MaterialRating;
@@ -32,14 +33,14 @@
  *
  * @author kevzlou7979
  */
-public class MaterialRatingTest extends MaterialAddinsTest {
+public class MaterialRatingTest extends AbstractValueWidgetTest {
 
     public void init() {
         MaterialRating rating = new MaterialRating();
         checkWidget(rating);
         checkStructure(rating);
         checkValue(rating);
-        checkValueChangeEvent(rating);
+        checkValueChangeEvent(rating, 5, 2);
         checkEditable(rating);
     }
 
@@ -59,17 +60,6 @@ protected <T extends MaterialRating> void checkEditable(T rating) {
         assertEquals(Math.toIntExact(rating.getValue()), 5);
     }
 
-    protected <T extends MaterialRating> void checkValueChangeEvent(T rating) {
-        final boolean[] isValueChangeFired = {false};
-        final Integer VALUE = 2;
-        rating.addValueChangeHandler(valueChangeEvent -> {
-            assertEquals(valueChangeEvent.getValue(), VALUE);
-            isValueChangeFired[0] = true;
-        });
-        rating.setValue(2, true);
-        assertTrue(isValueChangeFired[0]);
-    }
-
     protected <T extends MaterialRating> void checkValue(T rating) {
         // Determine the number of selected icons vs. unselected ones
         rating.setSelectedRatingIcon(IconType.FAVORITE);