Add tests for InputDeviceServer/InputDeviceClient.

services/ui/input_devices/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//services/shell/public/service_manifest.gni")
+import("//testing/test.gni")
+
 source_set("input_devices") {
   sources = [
     "input_device_server.cc",
     "input_device_server.h",
   ]
 
   deps = [
     "//base",
     "//services/shell/public/cpp:sources",
     "//skia",
     "//ui/events/devices",
   ]
 
   public_deps = [
     "//services/ui/public/interfaces/input_devices",
   ]
 }
+
+test("input_device_unittests") {
+  testonly = true
+
+  sources = [
+    "input_device_unittests.cc",
+  ]
+
+  deps = [
+    ":input_devices",
+    "//base",
+    "//base/test:test_support",
+    "//services/shell/public/cpp",
+    "//services/shell/public/cpp:service_test_support",
+    "//services/ui/common:run_all_shelltests",

[sadrul, 2016/08/02 15:16:14]

You should use //base/test:run_all_unittests instead.

[kylechar, 2016/08/02 17:46:57]

The Mojo binding stuff doesn't work with //base/test:run_all_unittests. It
produces an error like the following:

input_device_unittests: ../mojo/public/c/system/thunks.cc:47: MojoResult
MojoCreateMessagePipe(const MojoCreateMessagePipeOptions *, MojoHandle *,
MojoHandle *): Assertion `g_thunks.CreateMessagePipe' failed.

[sadrul, 2016/08/03 16:02:53]

Because this is not a shell-test, you shouldn't need the shell-test runner here.
Maybe //mojo/edk/test:run_all_unittests will work?

+    "//services/ui/public/cpp/input_devices",
+    "//services/ui/public/interfaces/input_devices",
+    "//skia",
+    "//testing/gtest",
+    "//ui/events/devices",
+  ]
+}