Refactor GN source expansions.

tools/gn/file_template_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/escape.h"
-#include "tools/gn/file_template.h"
-#include "tools/gn/test_with_scope.h"
-
-TEST(FileTemplate, Static) {
-  TestWithScope setup;
-
-  std::vector<std::string> templates;
-  templates.push_back("something_static");
-  FileTemplate t(setup.settings(), templates,
-                 FileTemplate::OUTPUT_ABSOLUTE, SourceDir("//"));
-  EXPECT_FALSE(t.has_substitutions());
-
-  std::vector<std::string> result;
-  t.Apply(SourceFile("//foo/bar"), &result);
-  ASSERT_EQ(1u, result.size());
-  EXPECT_EQ("something_static", result[0]);
-}
-
-TEST(FileTemplate, Typical) {
-  TestWithScope setup;
-
-  std::vector<std::string> templates;
-  templates.push_back("foo/{{source_name_part}}.cc");
-  templates.push_back("foo/{{source_name_part}}.h");
-  FileTemplate t(setup.settings(), templates,
-                 FileTemplate::OUTPUT_ABSOLUTE, SourceDir("//"));
-  EXPECT_TRUE(t.has_substitutions());
-
-  std::vector<std::string> result;
-  t.Apply(SourceFile("//sources/ha.idl"), &result);
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("foo/ha.cc", result[0]);
-  EXPECT_EQ("foo/ha.h", result[1]);
-}
-
-TEST(FileTemplate, Weird) {
-  TestWithScope setup;
-
-  std::vector<std::string> templates;
-  templates.push_back("{{{source}}{{source}}{{");
-  FileTemplate t(setup.settings(), templates,
-                 FileTemplate::OUTPUT_RELATIVE,
-                 setup.settings()->build_settings()->build_dir());
-  EXPECT_TRUE(t.has_substitutions());
-
-  std::vector<std::string> result;
-  t.Apply(SourceFile("//foo/lalala.c"), &result);
-  ASSERT_EQ(1u, result.size());
-  EXPECT_EQ("{../../foo/lalala.c../../foo/lalala.c{{", result[0]);
-}
-
-TEST(FileTemplate, NinjaExpansions) {
-  TestWithScope setup;
-
-  std::vector<std::string> templates;
-  templates.push_back("-i");
-  templates.push_back("{{source}}");
-  templates.push_back("--out=foo bar\"{{source_name_part}}\".o");
-  templates.push_back("");  // Test empty string.
-
-  FileTemplate t(setup.settings(), templates,
-                 FileTemplate::OUTPUT_RELATIVE,
-                 setup.settings()->build_settings()->build_dir());
-
-  std::ostringstream out;
-  t.WriteWithNinjaExpansions(out);
-
-#if defined(OS_WIN)
-  // The third argument should get quoted since it contains a space, and the
-  // embedded quotes should get shell escaped.
-  EXPECT_EQ(
-      " -i ${source} \"--out=foo$ bar\\\"${source_name_part}\\\".o\" \"\"",
-      out.str());
-#else
-  // On Posix we don't need to quote the whole thing and can escape all
-  // individual bad chars.
-  EXPECT_EQ(
-      " -i ${source} --out=foo\\$ bar\\\"${source_name_part}\\\".o \"\"",
-      out.str());
-#endif
-}
-
-TEST(FileTemplate, NinjaVariables) {
-  TestWithScope setup;
-
-  std::vector<std::string> templates;
-  templates.push_back("-i");
-  templates.push_back("{{source}}");
-  templates.push_back("--out=foo bar\"{{source_name_part}}\".o");
-  templates.push_back("{{source_file_part}}");
-  templates.push_back("{{source_dir}}");
-  templates.push_back("{{source_root_relative_dir}}");
-  templates.push_back("{{source_gen_dir}}");
-  templates.push_back("{{source_out_dir}}");
-
-  FileTemplate t(setup.settings(), templates,
-                 FileTemplate::OUTPUT_RELATIVE,
-                 setup.settings()->build_settings()->build_dir());
-
-  std::ostringstream out;
-  EscapeOptions options;
-  options.mode = ESCAPE_NINJA_COMMAND;
-  t.WriteNinjaVariablesForSubstitution(out, SourceFile("//foo/bar.txt"),
-                                       options);
-
-  // Just the variables used above should be written.
-  EXPECT_EQ(
-      "  source = ../../foo/bar.txt\n"
-      "  source_name_part = bar\n"
-      "  source_file_part = bar.txt\n"
-      "  source_dir = ../../foo\n"
-      "  source_root_rel_dir = foo\n"
-      "  source_gen_dir = gen/foo\n"
-      "  source_out_dir = obj/foo\n",
-      out.str());
-}
-
-// Tests in isolation different types of substitutions and that the right
-// things are generated.
-TEST(FileTemplate, Substitutions) {
-  TestWithScope setup;
-
-  // Call to get substitutions relative to the build dir.
-  #define GetRelSubst(str, what) \
-      FileTemplate::GetSubstitution( \
-          setup.settings(), \
-          SourceFile(str), \
-          FileTemplate::Subrange::what, \
-          FileTemplate::OUTPUT_RELATIVE, \
-          setup.settings()->build_settings()->build_dir())
-
-  // Call to get absolute directory substitutions.
-  #define GetAbsSubst(str, what) \
-      FileTemplate::GetSubstitution( \
-          setup.settings(), \
-          SourceFile(str), \
-          FileTemplate::Subrange::what, \
-          FileTemplate::OUTPUT_ABSOLUTE, \
-          SourceDir())
-
-  // Try all possible templates with a normal looking string.
-  EXPECT_EQ("../../foo/bar/baz.txt", GetRelSubst("//foo/bar/baz.txt", SOURCE));
-  EXPECT_EQ("//foo/bar/baz.txt", GetAbsSubst("//foo/bar/baz.txt", SOURCE));
-
-  EXPECT_EQ("baz", GetRelSubst("//foo/bar/baz.txt", NAME_PART));
-  EXPECT_EQ("baz", GetAbsSubst("//foo/bar/baz.txt", NAME_PART));
-
-  EXPECT_EQ("baz.txt", GetRelSubst("//foo/bar/baz.txt", FILE_PART));
-  EXPECT_EQ("baz.txt", GetAbsSubst("//foo/bar/baz.txt", FILE_PART));
-
-  EXPECT_EQ("../../foo/bar", GetRelSubst("//foo/bar/baz.txt", SOURCE_DIR));
-  EXPECT_EQ("//foo/bar", GetAbsSubst("//foo/bar/baz.txt", SOURCE_DIR));
-
-  EXPECT_EQ("foo/bar", GetRelSubst("//foo/bar/baz.txt", ROOT_RELATIVE_DIR));
-  EXPECT_EQ("foo/bar", GetAbsSubst("//foo/bar/baz.txt", ROOT_RELATIVE_DIR));
-
-  EXPECT_EQ("gen/foo/bar", GetRelSubst("//foo/bar/baz.txt", SOURCE_GEN_DIR));
-  EXPECT_EQ("//out/Debug/gen/foo/bar",
-            GetAbsSubst("//foo/bar/baz.txt", SOURCE_GEN_DIR));
-
-  EXPECT_EQ("obj/foo/bar", GetRelSubst("//foo/bar/baz.txt", SOURCE_OUT_DIR));
-  EXPECT_EQ("//out/Debug/obj/foo/bar",
-            GetAbsSubst("//foo/bar/baz.txt", SOURCE_OUT_DIR));
-
-  // Operations on an absolute path.
-  EXPECT_EQ("/baz.txt", GetRelSubst("/baz.txt", SOURCE));
-  EXPECT_EQ("/.", GetRelSubst("/baz.txt", SOURCE_DIR));
-  EXPECT_EQ("gen", GetRelSubst("/baz.txt", SOURCE_GEN_DIR));
-  EXPECT_EQ("obj", GetRelSubst("/baz.txt", SOURCE_OUT_DIR));
-
-  EXPECT_EQ(".", GetRelSubst("//baz.txt", ROOT_RELATIVE_DIR));
-
-  #undef GetAbsSubst
-  #undef GetRelSubst
-}