Add more tests and remove dead code.

This brings 9 classes over 80% branch coverage.

Change-Id: Id9edf22022c3f99d21fa6cad6df6994ee751079d

test/util/array_utils_unit.js

@@ -0,0 +1,57 @@
+/**
+ * @license
+ * Copyright 2016 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+describe('ArrayUtils', function() {
+  var ArrayUtils;
+
+  beforeAll(function() {
+    ArrayUtils = shaka.util.ArrayUtils;
+  });
+
+  describe('removeDuplicates', function() {
+    it('will remove duplicate elements', function() {
+      var arr = [1, 2, 2, 5, 6, 3, 1, 2];
+      expect(ArrayUtils.removeDuplicates(arr)).toEqual([1, 2, 5, 6, 3]);
+    });
+
+    it('does nothing if no duplicates', function() {
+      var arr = [1, 2, 3, 6, 5, 4];
+      expect(ArrayUtils.removeDuplicates(arr)).toEqual(arr);
+    });
+
+    it('accepts an optional comparator', function() {
+      var arr = ['aaa', 'abc', 'bat', 'car', 'cat'];
+      var comparator = function(a, b) { return a[0] === b[0]; };
+      expect(ArrayUtils.removeDuplicates(arr, comparator))
+          .toEqual(['aaa', 'bat', 'car']);
+    });
+  });
+
+  describe('indexOf', function() {
+    it('will find a matching element', function() {
+      var arr = ['aaa', 'bbb', 'ccc'];
+      var comparator = function(a, b) { return a[0] === b[0]; };
+      expect(ArrayUtils.indexOf(arr, 'bat', comparator)).toBe(1);
+    });
+
+    it('will return -1 if not found', function() {
+      var arr = ['aaa', 'bbb', 'ccc'];
+      var comparator = function(a, b) { return a[0] === b[0]; };
+      expect(ArrayUtils.indexOf(arr, 'zoo', comparator)).toBe(-1);
+    });
+  });
+});