Expand empty directories in GN to "."

tools/gn/ninja_binary_target_writer_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 "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/ninja_binary_target_writer.h"
 #include "tools/gn/target.h"
 #include "tools/gn/test_with_scope.h"
@@ skipping 21 matching lines @@
     writer.Run();
 
     const char expected[] =
         "defines =\n"
         "include_dirs =\n"
         "cflags =\n"
         "cflags_c =\n"
         "cflags_cc =\n"
         "cflags_objc =\n"
         "cflags_objcc =\n"
-        "root_out_dir = \n"
+        "root_out_dir = .\n"
         "target_out_dir = obj/foo\n"
         "target_output_name = bar\n"
         "\n"
         "build obj/foo/bar.input1.o: cxx ../../foo/input1.cc\n"
         "build obj/foo/bar.input2.o: cxx ../../foo/input2.cc\n"
         "\n"
         "build obj/foo/bar.stamp: stamp obj/foo/bar.input1.o "
             "obj/foo/bar.input2.o ../../foo/input3.o ../../foo/input4.obj\n";
     std::string out_str = out.str();
     EXPECT_EQ(expected, out_str);
@@ skipping 12 matching lines @@
     writer.Run();
 
     const char expected[] =
         "defines =\n"
         "include_dirs =\n"
         "cflags =\n"
         "cflags_c =\n"
         "cflags_cc =\n"
         "cflags_objc =\n"
         "cflags_objcc =\n"
-        "root_out_dir = \n"
+        "root_out_dir = .\n"
         "target_out_dir = obj/foo\n"
         "target_output_name = libshlib\n"
         "\n"
         "\n"
         // Ordering of the obj files here should come out in the order
         // specified, with the target's first, followed by the source set's, in
         // order.
-        "build libshlib.so: solink obj/foo/bar.input1.o "
+        "build ./libshlib.so: solink obj/foo/bar.input1.o "
             "obj/foo/bar.input2.o ../../foo/input3.o ../../foo/input4.obj\n"
         "  ldflags =\n"
         "  libs =\n"
         "  output_extension = .so\n";
     std::string out_str = out.str();
     EXPECT_EQ(expected, out_str);
   }
 
   // A static library that depends on the source set (should not link it).
   Target stlib_target(setup.settings(), Label(SourceDir("//foo/"), "stlib"));
   stlib_target.set_output_type(Target::STATIC_LIBRARY);
   stlib_target.deps().push_back(LabelTargetPair(&target));
   stlib_target.SetToolchain(setup.toolchain());
   stlib_target.OnResolved();
 
   {
     std::ostringstream out;
     NinjaBinaryTargetWriter writer(&stlib_target, out);
     writer.Run();
 
     const char expected[] =
         "defines =\n"
         "include_dirs =\n"
         "cflags =\n"
         "cflags_c =\n"
         "cflags_cc =\n"
         "cflags_objc =\n"
         "cflags_objcc =\n"
-        "root_out_dir = \n"
+        "root_out_dir = .\n"
         "target_out_dir = obj/foo\n"
         "target_output_name = libstlib\n"
         "\n"
         "\n"
         // There are no sources so there are no params to alink. (In practice
         // this will probably fail in the archive tool.)
         "build obj/foo/libstlib.a: alink\n"
         "  ldflags =\n"
         "  libs =\n"
         "  output_extension = \n";
@@ skipping 21 matching lines @@
   writer.Run();
 
   const char expected[] =
       "defines =\n"
       "include_dirs =\n"
       "cflags =\n"
       "cflags_c =\n"
       "cflags_cc =\n"
       "cflags_objc =\n"
       "cflags_objcc =\n"
-      "root_out_dir = \n"
+      "root_out_dir = .\n"
       "target_out_dir = obj/foo\n"
       "target_output_name = libshlib\n"
       "\n"
       "build obj/foo/libshlib.input1.o: cxx ../../foo/input1.cc\n"
       "build obj/foo/libshlib.input2.o: cxx ../../foo/input2.cc\n"
       "\n"
-      "build libshlib.so.6: solink obj/foo/libshlib.input1.o "
+      "build ./libshlib.so.6: solink obj/foo/libshlib.input1.o "
           "obj/foo/libshlib.input2.o\n"
       "  ldflags =\n"
       "  libs =\n"
       "  output_extension = .so.6\n";
 
   std::string out_str = out.str();
   EXPECT_EQ(expected, out_str);
 }
 
 TEST(NinjaBinaryTargetWriter, EmptyProductExtension) {
@@ skipping 17 matching lines @@
   writer.Run();
 
   const char expected[] =
       "defines =\n"
       "include_dirs =\n"
       "cflags =\n"
       "cflags_c =\n"
       "cflags_cc =\n"
       "cflags_objc =\n"
       "cflags_objcc =\n"
-      "root_out_dir = \n"
+      "root_out_dir = .\n"
       "target_out_dir = obj/foo\n"
       "target_output_name = libshlib\n"
       "\n"
       "build obj/foo/libshlib.input1.o: cxx ../../foo/input1.cc\n"
       "build obj/foo/libshlib.input2.o: cxx ../../foo/input2.cc\n"
       "\n"
-      "build libshlib.so: solink obj/foo/libshlib.input1.o "
+      "build ./libshlib.so: solink obj/foo/libshlib.input1.o "
           "obj/foo/libshlib.input2.o\n"
       "  ldflags =\n"
       "  libs =\n"
       "  output_extension = .so\n";
 
   std::string out_str = out.str();
   EXPECT_EQ(expected, out_str);
 }