Check for empty paths in path_util

chrome/browser/extensions/extension_path_util_unittest.cc

+// Copyright 2014 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/extensions/path_util.h"
+
+#include "base/file_util.h"
+#include "base/files/file_path.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using base::FilePath;
+
+namespace extensions {
+
+// Basic unittest for path_util::PrettifyPath in
+// chrome/browser/extensions/path_util.cc.
+// For legacy reasons, it's tested more in
+// FileSystemApiTest.FileSystemApiGetDisplayPathPrettify.
+TEST(ExtensionPathUtilTest, BasicPrettifyPathTest) {
+  // Test prettifying empty path.
+  FilePath actual;

[Devlin, 2014/08/06 23:35:56]

"actual" is a bit misleading, since they are both the "actual" path - or at
least should be.  Perhaps "initial" or even "unprettified".

[gpdavis, 2014/08/07 01:20:06]

Done.

+  FilePath prettified = path_util::PrettifyPath(actual);
+  ASSERT_EQ(actual, prettified);

[Devlin, 2014/08/06 23:35:56]

This can be an EXPECT, as can all of the others.

[gpdavis, 2014/08/07 01:20:06]

Done.

+
+  // Test home directory ("~").
+  actual = base::GetHomeDir();
+  prettified = path_util::PrettifyPath(actual);
+  ASSERT_NE(actual, prettified);
+  ASSERT_EQ(FilePath(FILE_PATH_LITERAL("~")), prettified);

[Devlin, 2014/08/06 23:35:55]

Save the FILE_PATH_LITERAL.

[gpdavis, 2014/08/07 01:20:06]

Done.

+
+  // Test with one layer ("~/foo").
+  actual = actual.AppendASCII("foo");
+  prettified = path_util::PrettifyPath(actual);
+  ASSERT_NE(actual, prettified);
+  ASSERT_EQ(FilePath(FILE_PATH_LITERAL("~")).AppendASCII("foo"), prettified);
+
+  // Test with two layers ("~/foo/bar").
+  actual = actual.AppendASCII("bar");
+  prettified = path_util::PrettifyPath(actual);
+  ASSERT_NE(actual, prettified);
+  ASSERT_EQ(
+      FilePath(FILE_PATH_LITERAL("~")).AppendASCII("foo").AppendASCII("bar"),
+      prettified);
+}
+
+}  // namespace extensions