Add rudimentary shelf delegate mus unit test.

ash/mus/shelf_delegate_mus_unittest.cc

+// 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.
+
+#include <memory>
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/run_loop.h"
+#include "components/mus/public/interfaces/window_server_test.mojom.h"
+#include "mash/shelf/public/interfaces/shelf.mojom.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
+#include "services/shell/public/cpp/shell_test.h"
+
+namespace {
+
+class TestShelfObserver : public mash::shelf::mojom::ShelfObserver {
+ public:
+  explicit TestShelfObserver(mash::shelf::mojom::ShelfControllerPtr* shelf)
+      : observer_binding_(this) {
+    mash::shelf::mojom::ShelfObserverAssociatedPtrInfo ptr_info;
+    observer_binding_.Bind(&ptr_info, shelf->associated_group());
+    (*shelf)->AddObserver(std::move(ptr_info));
+  }
+
+  ~TestShelfObserver() override {}
+
+  mash::shelf::mojom::Alignment alignment() const { return alignment_; }
+  mash::shelf::mojom::AutoHideBehavior auto_hide() const { return auto_hide_; }
+
+  void WaitForIncomingMethodCalls(size_t expected_calls) {
+    DCHECK_EQ(0u, expected_calls_);
+    expected_calls_ = expected_calls;
+    DCHECK(!run_loop_ || !run_loop_->running());
+    run_loop_.reset(new base::RunLoop());
+    run_loop_->Run();
+  }
+
+ private:
+  void OnMethodCall() {
+    DCHECK_LT(0u, expected_calls_);
+    DCHECK(run_loop_->running());
+    expected_calls_--;
+    if (expected_calls_ == 0u)
+      run_loop_->Quit();
+  }
+
+  // mash::shelf::mojom::ShelfObserver:
+  void OnAlignmentChanged(mash::shelf::mojom::Alignment alignment) override {
+    alignment_ = alignment;
+    OnMethodCall();
+  }
+  void OnAutoHideBehaviorChanged(
+      mash::shelf::mojom::AutoHideBehavior auto_hide) override {
+    auto_hide_ = auto_hide;
+    OnMethodCall();
+  }
+
+  mojo::AssociatedBinding<mash::shelf::mojom::ShelfObserver> observer_binding_;
+
+  mash::shelf::mojom::Alignment alignment_ =
+      mash::shelf::mojom::Alignment::BOTTOM;
+  mash::shelf::mojom::AutoHideBehavior auto_hide_ =
+      mash::shelf::mojom::AutoHideBehavior::NEVER;
+
+  size_t expected_calls_ = 0u;
+  std::unique_ptr<base::RunLoop> run_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestShelfObserver);
+};
+
+}  // namespace
+
+namespace ash {
+namespace sysui {
+
+void RunCallback(bool* success, const base::Closure& callback, bool result) {
+  *success = result;
+  callback.Run();
+}
+
+class ShelfDelegateMusTest : public shell::test::ShellTest {
+ public:
+  ShelfDelegateMusTest() : ShellTest("exe:mash_unittests") {}
+  ~ShelfDelegateMusTest() override {}
+
+ private:
+  void SetUp() override {
+    base::CommandLine::ForCurrentProcess()->AppendSwitch("use-test-config");
+    ShellTest::SetUp();
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(ShelfDelegateMusTest);
+};
+
+TEST_F(ShelfDelegateMusTest, AshSysUIHasDrawnWindow) {
+  // mash_session embeds ash_sysui, which paints the shelf.
+  connector()->Connect("mojo:mash_session");
+  mus::mojom::WindowServerTestPtr test_interface;
+  connector()->ConnectToInterface("mojo:mus", &test_interface);
+  base::RunLoop run_loop;
+  bool drawn = false;
+  test_interface->EnsureClientHasDrawnWindow(
+      "mojo:ash_sysui",
+      base::Bind(&RunCallback, &drawn, run_loop.QuitClosure()));
+  run_loop.Run();
+  EXPECT_TRUE(drawn);
+}
+
+TEST_F(ShelfDelegateMusTest, ShelfControllerAndObserverBasic) {
+  connector()->Connect("mojo:mash_session");
+  mash::shelf::mojom::ShelfControllerPtr shelf_controller;
+  connector()->ConnectToInterface("mojo:ash_sysui", &shelf_controller);
+
+  // Adding the observer should fire state initialization function calls.
+  TestShelfObserver observer(&shelf_controller);
+  observer.WaitForIncomingMethodCalls(2u);
+  EXPECT_EQ(mash::shelf::mojom::Alignment::BOTTOM, observer.alignment());
+  EXPECT_EQ(mash::shelf::mojom::AutoHideBehavior::NEVER, observer.auto_hide());
+
+  shelf_controller->SetAlignment(mash::shelf::mojom::Alignment::LEFT);
+  observer.WaitForIncomingMethodCalls(1u);
+  EXPECT_EQ(mash::shelf::mojom::Alignment::LEFT, observer.alignment());
+
+  shelf_controller->SetAutoHideBehavior(
+      mash::shelf::mojom::AutoHideBehavior::ALWAYS);
+  observer.WaitForIncomingMethodCalls(1u);
+  EXPECT_EQ(mash::shelf::mojom::AutoHideBehavior::ALWAYS, observer.auto_hide());
+}
+
+}  // namespace sysui
+}  // namespace ash