gn: Support build directories outside the source tree.

tools/gn/path_output_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 <sstream>
 
+#include "base/files/file_path.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/output_file.h"
 #include "tools/gn/path_output.h"
 #include "tools/gn/source_dir.h"
 #include "tools/gn/source_file.h"
 
 TEST(PathOutput, Basic) {
   SourceDir build_dir("//out/Debug/");
-  PathOutput writer(build_dir, ESCAPE_NONE);
+  base::StringPiece source_root("/source/root");
+  PathOutput writer(build_dir, source_root, ESCAPE_NONE);
   {
     // Normal source-root path.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/bar.cc"));
     EXPECT_EQ("../../foo/bar.cc", out.str());
   }
   {
     // File in the root dir.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo.cc"));
@@ skipping 20 matching lines @@
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("/foo/bar.cc"));
     EXPECT_EQ("/foo/bar.cc", out.str());
   }
 #endif
 }
 
 // Same as basic but the output dir is the root.
 TEST(PathOutput, BasicInRoot) {
   SourceDir build_dir("//");
-  PathOutput writer(build_dir, ESCAPE_NONE);
+  base::StringPiece source_root("/source/root");
+  PathOutput writer(build_dir, source_root, ESCAPE_NONE);
   {
     // Normal source-root path.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/bar.cc"));
     EXPECT_EQ("foo/bar.cc", out.str());
   }
   {
     // File in the root dir.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo.cc"));
     EXPECT_EQ("foo.cc", out.str());
   }
 }
 
 TEST(PathOutput, NinjaEscaping) {
   SourceDir build_dir("//out/Debug/");
-  PathOutput writer(build_dir, ESCAPE_NINJA);
+  base::StringPiece source_root("/source/root");
+  PathOutput writer(build_dir, source_root, ESCAPE_NINJA);
   {
     // Spaces and $ in filenames.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/foo bar$.cc"));
     EXPECT_EQ("../../foo/foo$ bar$$.cc", out.str());
   }
   {
     // Not other weird stuff
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/\"foo\\bar\".cc"));
     EXPECT_EQ("../../foo/\"foo\\bar\".cc", out.str());
   }
 }
 
 TEST(PathOutput, NinjaForkEscaping) {
   SourceDir build_dir("//out/Debug/");
-  PathOutput writer(build_dir, ESCAPE_NINJA_COMMAND);
+  base::StringPiece source_root("/source/root");
+  PathOutput writer(build_dir, source_root, ESCAPE_NINJA_COMMAND);
 
   // Spaces in filenames should get quoted on Windows.
   writer.set_escape_platform(ESCAPE_PLATFORM_WIN);
   {
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/foo bar.cc"));
     EXPECT_EQ("\"../../foo/foo$ bar.cc\"", out.str());
   }
 
   // Spaces in filenames should get escaped on Posix.
@@ skipping 32 matching lines @@
   writer.set_escape_platform(ESCAPE_PLATFORM_POSIX);
   {
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo\\bar.cc"));
     EXPECT_EQ("../../foo\\\\bar.cc", out.str());
   }
 }
 
 TEST(PathOutput, InhibitQuoting) {
   SourceDir build_dir("//out/Debug/");
-  PathOutput writer(build_dir, ESCAPE_NINJA_COMMAND);
+  base::StringPiece source_root("/source/root");
+  PathOutput writer(build_dir, source_root, ESCAPE_NINJA_COMMAND);
   writer.set_inhibit_quoting(true);
 
   writer.set_escape_platform(ESCAPE_PLATFORM_WIN);
   {
     // We should get unescaped spaces in the output with no quotes.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/foo bar.cc"));
     EXPECT_EQ("../../foo/foo$ bar.cc", out.str());
   }
 
   writer.set_escape_platform(ESCAPE_PLATFORM_POSIX);
   {
     // Escapes the space.
     std::ostringstream out;
     writer.WriteFile(out, SourceFile("//foo/foo bar.cc"));
     EXPECT_EQ("../../foo/foo\\$ bar.cc", out.str());
   }
 }
 
 TEST(PathOutput, WriteDir) {
   {
     SourceDir build_dir("//out/Debug/");
-    PathOutput writer(build_dir, ESCAPE_NINJA);
+    base::StringPiece source_root("/source/root");
+    PathOutput writer(build_dir, source_root, ESCAPE_NINJA);
     {
       std::ostringstream out;
       writer.WriteDir(out, SourceDir("//foo/bar/"),
                       PathOutput::DIR_INCLUDE_LAST_SLASH);
       EXPECT_EQ("../../foo/bar/", out.str());
     }
     {
       std::ostringstream out;
       writer.WriteDir(out, SourceDir("//foo/bar/"),
                       PathOutput::DIR_NO_LAST_SLASH);
@@ skipping 75 matching lines @@
     }
     {
       std::ostringstream out;
       writer.WriteDir(out, OutputFile(),
                       PathOutput::DIR_INCLUDE_LAST_SLASH);
       EXPECT_EQ("", out.str());
     }
   }
   {
     // Empty build dir writer.
-    PathOutput root_writer(SourceDir("//"), ESCAPE_NINJA);
+    base::StringPiece source_root("/source/root");
+    PathOutput root_writer(SourceDir("//"), source_root, ESCAPE_NINJA);
     {
       std::ostringstream out;
       root_writer.WriteDir(out, SourceDir("//"),
                            PathOutput::DIR_INCLUDE_LAST_SLASH);
       EXPECT_EQ("./", out.str());
     }
     {
       std::ostringstream out;
       root_writer.WriteDir(out, SourceDir("//"),
                            PathOutput::DIR_NO_LAST_SLASH);
       EXPECT_EQ(".", out.str());
     }
   }
 }