test: add test for item click listener

Close #47

Author: javier-godoy

src/test/java/com/flowingcode/vaadin/addons/chipfield/integration/ChipFieldElement.java

@@ -40,4 +40,10 @@ public void sendKeys(CharSequence... keysToSend) {
   public void selectByText(String label) {
     sendKeys(label, Keys.ARROW_DOWN, Keys.ENTER);
   }
+
+  public void click(int index) {
+    TestBenchElement chip = $("paper-chip").get(index);
+    executeScript("arguments[0].root.querySelector('.chip').click()", chip);
+  }
+
 }

src/test/java/com/flowingcode/vaadin/addons/chipfield/integration/ViewIT.java

@@ -22,7 +22,6 @@
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
-
 import java.util.Arrays;
 import java.util.Collection;
 import org.hamcrest.Matcher;
@@ -203,6 +202,27 @@ public void testAdditionalItemRemovedListenerFromServer() {
     $server.setValue();
     assertThat($server.getLastRemovedItem(), Matchers.is(ADDITIONAL));
   }
+
+  @Test
+  public void testItemClickedListener() {
+    $server.addItemClickedListener();
+
+    $server.setValue(LOREM);
+    chipfield.click(0);
+    assertThat($server.getLastClickedItem(), Matchers.is(LOREM));
+  }
+
+  @Test
+  public void testAdditionalItemClickedListener() {
+    $server.allowAdditionalItems(true);
+    $server.useNewItemHandler(true);
+    $server.addItemClickedListener();
+
+    $server.setValue(ADDITIONAL);
+    chipfield.click(0);
+    assertThat($server.getLastClickedItem(), Matchers.is(ADDITIONAL));
+  }
+
   /**
    * Test that readonly does not allow deleting chips
    *