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diff --git a/devtools/client/commandline/test/browser_gcli_history.js b/devtools/client/commandline/test/browser_gcli_history.js
new file mode 100644
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+++ b/devtools/client/commandline/test/browser_gcli_history.js
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+/*
+ * Copyright 2012, Mozilla Foundation and contributors
+ *
+ * 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.
+ */
+
+"use strict";
+
+// THIS FILE IS GENERATED FROM SOURCE IN THE GCLI PROJECT
+// PLEASE TALK TO SOMEONE IN DEVELOPER TOOLS BEFORE EDITING IT
+
+const exports = {};
+
+function test() {
+  helpers.runTestModule(exports, "browser_gcli_history.js");
+}
+
+// var assert = require('../testharness/assert');
+var History = require("gcli/ui/history").History;
+
+exports.testSimpleHistory = function (options) {
+  var history = new History({});
+  history.add("foo");
+  history.add("bar");
+  assert.is(history.backward(), "bar");
+  assert.is(history.backward(), "foo");
+
+  // Adding to the history again moves us back to the start of the history.
+  history.add("quux");
+  assert.is(history.backward(), "quux");
+  assert.is(history.backward(), "bar");
+  assert.is(history.backward(), "foo");
+};
+
+exports.testBackwardsPastIndex = function (options) {
+  var history = new History({});
+  history.add("foo");
+  history.add("bar");
+  assert.is(history.backward(), "bar");
+  assert.is(history.backward(), "foo");
+
+  // Moving backwards past recorded history just keeps giving you the last
+  // item.
+  assert.is(history.backward(), "foo");
+};
+
+exports.testForwardsPastIndex = function (options) {
+  var history = new History({});
+  history.add("foo");
+  history.add("bar");
+  assert.is(history.backward(), "bar");
+  assert.is(history.backward(), "foo");
+
+  // Going forward through the history again.
+  assert.is(history.forward(), "bar");
+
+  // 'Present' time.
+  assert.is(history.forward(), "");
+
+  // Going to the 'future' just keeps giving us the empty string.
+  assert.is(history.forward(), "");
+};