Add a utility class needed by the scanner

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/utilities/collection/IntListTest.java

+/*
+ * Copyright (c) 2012, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.dart.engine.utilities.collection;
+
+import junit.framework.TestCase;
+
+public class IntListTest extends TestCase {
+  public void test_IntList() {
+    IntList firstList = new IntList();
+    assertNotNull(firstList);
+    assertEquals(0, firstList.size());
+
+    IntList secondList = new IntList(20);
+    assertNotNull(secondList);
+    assertEquals(0, secondList.size());
+  }
+
+  public void test_IntList_add_grow() {
+    IntList list = new IntList(2);
+    list.add(1);
+    list.add(2);
+    list.add(3);
+    assertEquals(3, list.size());
+  }
+
+  public void test_IntList_add_noGrow() {
+    IntList list = new IntList(20);
+    list.add(1);
+    assertEquals(1, list.size());
+  }
+
+  public void test_IntList_toArray_empty() {
+    IntList list = new IntList(20);
+    int[] result = list.toArray();
+    assertNotNull(result);
+    assertEquals(0, result.length);
+  }
+
+  public void test_IntList_toArray_nonEmpty() {
+    IntList list = new IntList(20);
+    list.add(1);
+    list.add(2);
+    list.add(3);
+    int[] result = list.toArray();
+    assertNotNull(result);
+    assertEquals(3, result.length);
+  }
+}