Add initial prototype for the GN meta-buildsystem.

tools/gn/path_output_unittest.cc

Index: tools/gn/path_output_unittest.cc
diff --git a/tools/gn/path_output_unittest.cc b/tools/gn/path_output_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5133b793facfb04311e518655fcd25ee20d1b383
--- /dev/null
+++ b/tools/gn/path_output_unittest.cc
@@ -0,0 +1,193 @@
+// 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 "testing/gtest/include/gtest/gtest.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, false);
+  {
+    // 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());
+  }
+#if defined(OS_WIN)
+  {
+    // System-absolute path.
+    std::ostringstream out;
+    writer.WriteFile(out, SourceFile("/C:/foo/bar.cc"));
+    EXPECT_EQ("C:/foo/bar.cc", out.str());
+  }
+#else
+  {
+    // System-absolute path.
+    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, false);
+  {
+    // 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, false);
+  {
+    // 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, ShellEscaping) {
+  SourceDir build_dir("//out/Debug/");
+  PathOutput writer(build_dir, ESCAPE_SHELL, false);
+  {
+    // Spaces in filenames should get quoted.
+    std::ostringstream out;
+    writer.WriteFile(out, SourceFile("//foo/foo bar.cc"));
+    EXPECT_EQ("\"../../foo/foo bar.cc\"", out.str());
+  }
+  {
+    // Quotes should get blackslash-escaped.
+    std::ostringstream out;
+    writer.WriteFile(out, SourceFile("//foo/\"foobar\".cc"));
+    EXPECT_EQ("../../foo/\\\"foobar\\\".cc", out.str());
+  }
+  {
+    // Backslashes should get escaped on non-Windows and preserved on Windows.
+    std::ostringstream out;
+    writer.WriteFile(out, SourceFile("//foo\\bar.cc"));
+#if defined(OS_WIN)
+    EXPECT_EQ("../../foo\\bar.cc", out.str());
+#else
+    EXPECT_EQ("../../foo\\\\bar.cc", out.str());
+#endif
+  }
+}
+
+TEST(PathOutput, SlashConversion) {
+  SourceDir build_dir("//out/Debug/");
+  PathOutput writer(build_dir, ESCAPE_NINJA, true);
+  {
+    std::ostringstream out;
+    writer.WriteFile(out, SourceFile("//foo/bar.cc"));
+#if defined(OS_WIN)
+    EXPECT_EQ("..\\..\\foo\\bar.cc", out.str());
+#else
+    EXPECT_EQ("../../foo/bar.cc", out.str());
+#endif
+  }
+}
+
+TEST(PathOutput, InhibitQuoting) {
+  SourceDir build_dir("//out/Debug/");
+  PathOutput writer(build_dir, ESCAPE_SHELL, false);
+  writer.set_inhibit_quoting(true);
+  {
+    // 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());
+  }
+}
+
+TEST(PathOutput, WriteDir) {
+  {
+    SourceDir build_dir("//out/Debug/");
+    PathOutput writer(build_dir, ESCAPE_NINJA, false);
+    {
+      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);
+      EXPECT_EQ("../../foo/bar", out.str());
+    }
+
+    // Output source root dir.
+    {
+      std::ostringstream out;
+      writer.WriteDir(out, SourceDir("//"),
+                      PathOutput::DIR_INCLUDE_LAST_SLASH);
+      EXPECT_EQ("../../", out.str());
+    }
+    {
+      std::ostringstream out;
+      writer.WriteDir(out, SourceDir("//"),
+                      PathOutput::DIR_NO_LAST_SLASH);
+      EXPECT_EQ("../..", out.str());
+    }
+
+    // Output system root dir.
+    {
+      std::ostringstream out;
+      writer.WriteDir(out, SourceDir("/"),
+                      PathOutput::DIR_INCLUDE_LAST_SLASH);
+      EXPECT_EQ("/", out.str());
+    }
+    {
+      std::ostringstream out;
+      writer.WriteDir(out, SourceDir("/"),
+                      PathOutput::DIR_NO_LAST_SLASH);
+      EXPECT_EQ("/", out.str());
+    }
+  }
+  {
+    // Empty build dir writer.
+    PathOutput root_writer(SourceDir("//"), ESCAPE_NINJA, false);
+    {
+      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());
+    }
+  }
+}