Add _.isArrayBuffer test.

test/test.js

@@ -7892,6 +7892,61 @@
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.isArrayBuffer');
+
+  (function() {
+    var args = arguments;
+
+    QUnit.test('should return `true` for buffers', function(assert) {
+      assert.expect(1);
+
+      if (Buffer) {
+        assert.strictEqual(_.isArrayBuffer(new ArrayBuffer(2)), true);
+      }
+      else {
+        skipTest(assert);
+      }
+    });
+
+    QUnit.test('should return `false` for non buffers', function(assert) {
+      assert.expect(13);
+
+      var expected = lodashStable.map(falsey, alwaysFalse);
+
+      var actual = lodashStable.map(falsey, function(value, index) {
+        return index ? _.isArrayBuffer(value) : _.isArrayBuffer();
+      });
+
+      assert.deepEqual(actual, expected);
+
+      assert.strictEqual(_.isArrayBuffer(args), false);
+      assert.strictEqual(_.isArrayBuffer([1, 2, 3]), false);
+      assert.strictEqual(_.isArrayBuffer(true), false);
+      assert.strictEqual(_.isArrayBuffer(new Date), false);
+      assert.strictEqual(_.isArrayBuffer(new Error), false);
+      assert.strictEqual(_.isArrayBuffer(_), false);
+      assert.strictEqual(_.isArrayBuffer(slice), false);
+      assert.strictEqual(_.isArrayBuffer({ 'a': 1 }), false);
+      assert.strictEqual(_.isArrayBuffer(1), false);
+      assert.strictEqual(_.isArrayBuffer(/x/), false);
+      assert.strictEqual(_.isArrayBuffer('a'), false);
+      assert.strictEqual(_.isArrayBuffer(symbol), false);
+    });
+
+    QUnit.test('should work with array buffers from another realm', function(assert) {
+      assert.expect(1);
+
+      if (realm.arrayBuffer) {
+        assert.strictEqual(_.isArrayBuffer(realm.arrayBuffer), true);
+      }
+      else {
+        skipTest(assert);
+      }
+    });
+  }(1, 2, 3));
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash.isArrayLike');
 
   (function() {