Add "Open with <ARC-app-name>" items to the context menu

components/arc/intent_helper/open_with_menu_observer_unittest.cc

Index: components/arc/intent_helper/open_with_menu_observer_unittest.cc
diff --git a/components/arc/intent_helper/open_with_menu_observer_unittest.cc b/components/arc/intent_helper/open_with_menu_observer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..664b76e7a6d4740b177737b44b1b13e171fb636a
--- /dev/null
+++ b/components/arc/intent_helper/open_with_menu_observer_unittest.cc
@@ -0,0 +1,130 @@
+// 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 "base/strings/stringprintf.h"
+#include "components/arc/intent_helper/open_with_menu_observer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace arc {
+
+namespace {
+
+// All tests in this file assume that 4 and 10 IDC command IDs are reserved
+// for the main and sub menus, respectively.
+const int kFirstMainMenuId = 0x12345;
+const int kFirstSubMenuId = 0x23456;
+
+std::pair<OpenWithMenuObserver::HandlerMap, int> BuildHandlersMap(
+    size_t num_apps) {
+  mojo::Array<UrlHandlerInfoPtr> handlers;
+  for (size_t i = 0; i < num_apps; ++i) {
+    UrlHandlerInfoPtr p = UrlHandlerInfo::New();
+    p->name = base::StringPrintf("App %zu", i);
+    handlers.push_back(std::move(p));
+  }
+  return OpenWithMenuObserver::BuildHandlersMapForTesting(
+      kFirstMainMenuId, 4, kFirstSubMenuId, 10, std::move(handlers));
+}
+
+}  // namespace
+
+TEST(OpenWithMenuObserverTest, TestGetCommandIdsToEnable) {
+  auto result = BuildHandlersMap(0);
+  EXPECT_EQ(0U, result.first.size());
+  EXPECT_EQ(-1, result.second);
+
+  result = BuildHandlersMap(1);
+  ASSERT_EQ(1U, result.first.size());
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  EXPECT_EQ(-1, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+
+  result = BuildHandlersMap(2);
+  EXPECT_EQ(2U, result.first.size());
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  EXPECT_EQ(-1, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+
+  result = BuildHandlersMap(3);
+  EXPECT_EQ(3U, result.first.size());
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 2));
+  EXPECT_EQ(-1, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+  EXPECT_EQ("App 2", result.first[kFirstMainMenuId + 2]->name);
+
+  // Test if app names will overflow to the sub menu.
+  result = BuildHandlersMap(4);
+  EXPECT_EQ(4U, result.first.size());
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  // In this case, kFirstMainMenuId + 2 should be hidden.
+  EXPECT_EQ(kFirstMainMenuId + 3, result.second);
+  ASSERT_EQ(1U, result.first.count(kFirstSubMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstSubMenuId + 1));
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+  EXPECT_EQ("App 2", result.first[kFirstSubMenuId]->name);
+  EXPECT_EQ("App 3", result.first[kFirstSubMenuId + 1]->name);
+
+  result = BuildHandlersMap(11);
+  EXPECT_EQ(11U, result.first.size());
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  EXPECT_EQ(kFirstMainMenuId + 3, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+  for (size_t i = 0; i < 9; ++i) {
+    ASSERT_EQ(1U, result.first.count(kFirstSubMenuId + i)) << i;
+  }
+
+  // The main and sub menus can show up to 12 (=3+10-1) app names.
+  result = BuildHandlersMap(12);
+  EXPECT_EQ(12U, result.first.size());
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  EXPECT_EQ(kFirstMainMenuId + 3, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+  for (size_t i = 0; i < 10; ++i) {
+    const int id = kFirstSubMenuId + i;
+    ASSERT_EQ(1U, result.first.count(id)) << i;
+    EXPECT_EQ(base::StringPrintf("App %zu", i + 2), result.first[id]->name)
+        << i;
+  }
+
+  result = BuildHandlersMap(13);
+  EXPECT_EQ(12U, result.first.size());  // still 12
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  EXPECT_EQ(kFirstMainMenuId + 3, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+  for (size_t i = 0; i < 10; ++i) {  // still 10
+    const int id = kFirstSubMenuId + i;
+    ASSERT_EQ(1U, result.first.count(id)) << i;
+    EXPECT_EQ(base::StringPrintf("App %zu", i + 2), result.first[id]->name)
+        << i;
+  }
+
+  result = BuildHandlersMap(1000);
+  EXPECT_EQ(12U, result.first.size());  // still 12
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId));
+  ASSERT_EQ(1U, result.first.count(kFirstMainMenuId + 1));
+  EXPECT_EQ(kFirstMainMenuId + 3, result.second);
+  EXPECT_EQ("App 0", result.first[kFirstMainMenuId]->name);
+  EXPECT_EQ("App 1", result.first[kFirstMainMenuId + 1]->name);
+  for (size_t i = 0; i < 10; ++i) {  // still 10
+    const int id = kFirstSubMenuId + i;
+    ASSERT_EQ(1U, result.first.count(id)) << i;
+    EXPECT_EQ(base::StringPrintf("App %zu", i + 2), result.first[id]->name)
+        << i;
+  }
+}
+
+}  // namespace arc