first cut: establishes base helper classes and main

developer_switch_unittest.cc

+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Tests for cros_boot_mode::DeveloperSwitch default behavior.
+// This also acts as the canonical unittest for PlatformSwitch default
+// behavior.
+#include "developer_switch.h"
+
+#include <base/basictypes.h>
+#include <base/file_util.h>
+#include <gtest/gtest.h>
+#include <string>
+
+class DeveloperSwitchTest : public ::testing::Test {
+ public:
+  void SetUp() {
+    EXPECT_TRUE(file_util::CreateNewTempDirectory("", &temp_dir_));
+    switch_file_path_ = temp_dir_.value();
+    switch_file_path_.append("chsw");
+    switch_.set_platform_file_path(switch_file_path_.c_str());
+  }
+
+  void TearDown() {
+    file_util::Delete(temp_dir_, true);
+  }
+
+  void ExpectPosition(int pos) {
+    static const char *kUnsupported = "unsupported";
+    EXPECT_EQ(pos, switch_.value());
+    // If the position is -1, it is does not index.
+    const char *expected_c_str = kUnsupported;
+    if (pos >= 0)
+      expected_c_str = cros_boot_mode::PlatformSwitch::kPositionText[pos];
+    EXPECT_STREQ(expected_c_str, switch_.c_str());
+  }
+ protected:
+   std::string switch_file_path_;
+   FilePath temp_dir_;
+   cros_boot_mode::DeveloperSwitch switch_;
+};
+
+
+TEST_F(DeveloperSwitchTest, Disabled) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "0", 2), 2);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kDisabled);
+}
+
+TEST_F(DeveloperSwitchTest, DisabledWithOtherSwitches) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "528", 4), 4);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kDisabled);
+}
+
+TEST_F(DeveloperSwitchTest, Enabled) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "32", 3), 3);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kEnabled);
+}
+
+TEST_F(DeveloperSwitchTest, EnabledWithOtherSwitches) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "544", 4), 4);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kEnabled);
+}
+
+TEST_F(DeveloperSwitchTest, EnabledWithOtherSwitches2) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "4128", 5), 5);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kEnabled);
+}
+
+TEST_F(DeveloperSwitchTest, EnabledWithOtherSwitches3) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "65535", 6), 6);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kEnabled);
+}
+
+TEST_F(DeveloperSwitchTest, BadTruncationMakesUnsupported) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "100000", 7), 7);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kUnsupported);
+}
+
+TEST_F(DeveloperSwitchTest, MissingFile) {
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kUnsupported);
+}
+
+TEST_F(DeveloperSwitchTest, UnsupportedPlatform) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "-1", 3), 3);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kUnsupported);
+}
+
+TEST_F(DeveloperSwitchTest, EmptyFile) {
+  EXPECT_EQ(file_util::WriteFile(FilePath(switch_file_path_), "", 0), 0);
+  switch_.Initialize();
+  ExpectPosition(cros_boot_mode::PlatformSwitch::kUnsupported);
+}