GN: Change gen command syntax, support relative dirs.

tools/gn/filesystem_utils_unittest.cc

 // Copyright (c) 2013 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/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/filesystem_utils.h"
 
@@ skipping 236 matching lines @@
 }
 
 TEST(FilesystemUtils, DirectoryWithNoLastSlash) {
   EXPECT_EQ("", DirectoryWithNoLastSlash(SourceDir()));
   EXPECT_EQ("/.", DirectoryWithNoLastSlash(SourceDir("/")));
   EXPECT_EQ("//.", DirectoryWithNoLastSlash(SourceDir("//")));
   EXPECT_EQ("//foo", DirectoryWithNoLastSlash(SourceDir("//foo/")));
   EXPECT_EQ("/bar", DirectoryWithNoLastSlash(SourceDir("/bar/")));
 }
 
+TEST(FilesystemUtils, SourceDirForPath) {
+#if defined(OS_WIN)
+  base::FilePath root(L"C:\\source\\foo\\");
+  EXPECT_EQ("/C:/foo/bar/", SourceDirForPath(root,
+            base::FilePath(L"C:\\foo\\bar")).value());
+  EXPECT_EQ("/", SourceDirForPath(root,
+            base::FilePath(L"/")).value());
+  EXPECT_EQ("//", SourceDirForPath(root,
+            base::FilePath(L"C:\\source\\foo")).value());
+  EXPECT_EQ("//bar/", SourceDirForPath(root,
+            base::FilePath(L"C:\\source\\foo\\bar\\")). value());
+  EXPECT_EQ("//bar/baz/", SourceDirForPath(root,
+            base::FilePath(L"C:\\source\\foo\\bar\\baz")).value());
+
+  // Should be case-and-slash-insensitive.
+  EXPECT_EQ("//baR/", SourceDirForPath(root,
+            base::FilePath(L"c:/SOURCE\\Foo/baR/")).value());
+
+  // Some "weird" Windows paths.
+  EXPECT_EQ("/foo/bar/", SourceDirForPath(root,
+            base::FilePath(L"/foo/bar/")).value());
+  EXPECT_EQ("/C:/foo/bar/", SourceDirForPath(root,
+            base::FilePath(L"C:foo/bar/")).value());
+
+  // Also allow absolute GN-style Windows paths.
+  EXPECT_EQ("/C:/foo/bar/", SourceDirForPath(root,
+            base::FilePath(L"/C:/foo/bar")).value());
+  EXPECT_EQ("//bar/", SourceDirForPath(root,
+            base::FilePath(L"/C:/source/foo/bar")).value());
+
+#else
+  base::FilePath root("/source/foo/");
+  EXPECT_EQ("/foo/bar/", SourceDirForPath(root,
+            base::FilePath("/foo/bar/")).value());
+  EXPECT_EQ("/", SourceDirForPath(root,
+            base::FilePath("/")).value());
+  EXPECT_EQ("//", SourceDirForPath(root,
+            base::FilePath("/source/foo")).value());
+  EXPECT_EQ("//bar/", SourceDirForPath(root,
+            base::FilePath("/source/foo/bar/")).value());
+  EXPECT_EQ("//bar/baz/", SourceDirForPath(root,
+            base::FilePath("/source/foo/bar/baz/")).value());
+
+  // Should be case-sensitive.
+  EXPECT_EQ("/SOURCE/foo/bar/", SourceDirForPath(root,
+            base::FilePath("/SOURCE/foo/bar/")).value());
+#endif
+}
+
 TEST(FilesystemUtils, GetToolchainDirs) {
   BuildSettings build_settings;
   build_settings.SetBuildDir(SourceDir("//out/Debug/"));
 
   Settings default_settings(&build_settings, "");
   EXPECT_EQ("//out/Debug/",
             GetToolchainOutputDir(&default_settings).value());
   EXPECT_EQ("//out/Debug/gen/",
             GetToolchainGenDir(&default_settings).value());
 
@@ skipping 53 matching lines @@
   build_settings.SetBuildDir(SourceDir("//"));
   Settings settings(&build_settings, "");
 
   EXPECT_EQ("//", GetToolchainOutputDir(&settings).value());
   EXPECT_EQ("//gen/", GetToolchainGenDir(&settings).value());
   EXPECT_EQ("//obj/",
             GetOutputDirForSourceDir(&settings, SourceDir("//")).value());
   EXPECT_EQ("//gen/",
             GetGenDirForSourceDir(&settings, SourceDir("//")).value());
 }