cros: Allow default app order to be loaded from an external file.

chrome/browser/chromeos/extensions/default_app_order_unittest.cc

+// Copyright (c) 2012 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 "chrome/browser/chromeos/extensions/default_app_order.h"
+
+#include <string>
+#include <vector>
+
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/path_service.h"
+#include "base/scoped_temp_dir.h"
+#include "base/test/scoped_path_override.h"
+#include "chrome/common/chrome_paths.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+namespace {
+
+const FilePath::CharType kTestFile[] =
+    FILE_PATH_LITERAL("test_default_app_order.json");
+}
+
+class DefaultAppOrderTest : public testing::Test {
+ public:
+  DefaultAppOrderTest() {}
+  virtual ~DefaultAppOrderTest() {}
+
+  // testing::Test overrides:
+  virtual void SetUp() OVERRIDE {
+    default_app_order::Get(&built_in_default_);
+  }
+  virtual void TearDown() OVERRIDE {
+  }
+
+  bool IsBuiltInDefault(const std::vector<std::string>& apps) {
+    if (apps.size() != built_in_default_.size())
+      return false;
+
+    for (size_t i = 0; i < built_in_default_.size(); ++i) {
+      if (built_in_default_[i] != apps[i])
+        return false;
+    }
+
+    return true;
+  }
+
+  void SetExternalFile(const FilePath& path) {
+    path_override_.reset(new base::ScopedPathOverride(
+        chrome::FILE_DEFAULT_APP_ORDER, path));
+  }
+
+  void CreateExternalOrderFile(const std::string& content) {
+    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+    FilePath external_file = temp_dir_.path().Append(kTestFile);
+    file_util::WriteFile(external_file, content.c_str(), content.size());
+    SetExternalFile(external_file);
+  }
+
+ private:
+  std::vector<std::string> built_in_default_;
+
+  ScopedTempDir temp_dir_;
+  scoped_ptr<base::ScopedPathOverride> path_override_;
+
+  DISALLOW_COPY_AND_ASSIGN(DefaultAppOrderTest);
+};
+
+// Tests that the built-in default order is returned when ExternalLoader is not
+// created.
+TEST_F(DefaultAppOrderTest, BuiltInDefault) {
+  std::vector<std::string> apps;
+  default_app_order::Get(&apps);
+  EXPECT_TRUE(IsBuiltInDefault(apps));
+}
+
+// Tests external order file overrides built-in default.
+TEST_F(DefaultAppOrderTest, ExternalOrder) {
+  const char kExternalOrder[] = "[\"app1\",\"app2\",\"app3\"]";
+  CreateExternalOrderFile(std::string(kExternalOrder));
+
+  scoped_ptr<default_app_order::ExternalLoader> loader(
+      new default_app_order::ExternalLoader(false));
+
+  std::vector<std::string> apps;
+  default_app_order::Get(&apps);
+  EXPECT_EQ(3u, apps.size());
+  EXPECT_EQ(std::string("app1"), apps[0]);
+  EXPECT_EQ(std::string("app2"), apps[1]);
+  EXPECT_EQ(std::string("app3"), apps[2]);
+}
+
+// Tests none-existent order file gives built-in default.
+TEST_F(DefaultAppOrderTest, NoExternalFile) {
+  SetExternalFile(FilePath(FILE_PATH_LITERAL("none_existent_file")));
+
+  scoped_ptr<default_app_order::ExternalLoader> loader(
+      new default_app_order::ExternalLoader(false));
+
+  std::vector<std::string> apps;
+  default_app_order::Get(&apps);
+  EXPECT_TRUE(IsBuiltInDefault(apps));
+}
+
+// Tests bad json file gives built-in default.
+TEST_F(DefaultAppOrderTest, BadExternalFile) {
+  const char kExternalOrder[] = "This is not a valid json.";
+  CreateExternalOrderFile(std::string(kExternalOrder));
+
+  scoped_ptr<default_app_order::ExternalLoader> loader(
+      new default_app_order::ExternalLoader(false));
+
+  std::vector<std::string> apps;
+  default_app_order::Get(&apps);
+  EXPECT_TRUE(IsBuiltInDefault(apps));
+}
+
+}  // namespace chromeos