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// 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 <map>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/memory/linked_ptr.h"
#include "base/message_loop/message_loop.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "tools/gn/build_settings.h"
#include "tools/gn/err.h"
#include "tools/gn/loader.h"
#include "tools/gn/parse_tree.h"
#include "tools/gn/parser.h"
#include "tools/gn/scheduler.h"
#include "tools/gn/tokenizer.h"
namespace {
class MockInputFileManager {
public:
typedef base::Callback<void(const ParseNode*)> Callback;
MockInputFileManager() {
}
LoaderImpl::AsyncLoadFileCallback GetCallback();
// Sets a given response for a given source file.
void AddCannedResponse(const SourceFile& source_file,
const std::string& source);
// Returns true if there is/are pending load(s) matching the given file(s).
bool HasOnePending(const SourceFile& f) const;
bool HasTwoPending(const SourceFile& f1, const SourceFile& f2) const;
void IssueAllPending();
private:
struct CannedResult {
scoped_ptr<InputFile> input_file;
std::vector<Token> tokens;
scoped_ptr<ParseNode> root;
};
bool AsyncLoadFile(const LocationRange& origin,
const BuildSettings* build_settings,
const SourceFile& file_name,
const Callback& callback,
Err* err) {
pending_.push_back(std::make_pair(file_name, callback));
return true;
}
// Owning pointers.
typedef std::map<SourceFile, linked_ptr<CannedResult> > CannedResponseMap;
CannedResponseMap canned_responses_;
std::vector< std::pair<SourceFile, Callback> > pending_;
};
LoaderImpl::AsyncLoadFileCallback MockInputFileManager::GetCallback() {
return base::Bind(&MockInputFileManager::AsyncLoadFile,
base::Unretained(this));
}
// Sets a given response for a given source file.
void MockInputFileManager::AddCannedResponse(const SourceFile& source_file,
const std::string& source) {
CannedResult* canned = new CannedResult;
canned->input_file.reset(new InputFile(source_file));
canned->input_file->SetContents(source);
// Tokenize.
Err err;
canned->tokens = Tokenizer::Tokenize(canned->input_file.get(), &err);
EXPECT_FALSE(err.has_error());
// Parse.
canned->root = Parser::Parse(canned->tokens, &err).Pass();
EXPECT_FALSE(err.has_error());
canned_responses_[source_file] = linked_ptr<CannedResult>(canned);
}
bool MockInputFileManager::HasOnePending(const SourceFile& f) const {
return pending_.size() == 1u && pending_[0].first == f;
}
bool MockInputFileManager::HasTwoPending(const SourceFile& f1,
const SourceFile& f2) const {
if (pending_.size() != 2u)
return false;
return pending_[0].first == f1 && pending_[1].first == f2;
}
void MockInputFileManager::IssueAllPending() {
BlockNode block(false); // Default response.
for (const auto& cur : pending_) {
CannedResponseMap::const_iterator found = canned_responses_.find(cur.first);
if (found == canned_responses_.end())
cur.second.Run(&block);
else
cur.second.Run(found->second->root.get());
}
pending_.clear();
}
// LoaderTest ------------------------------------------------------------------
class LoaderTest : public testing::Test {
public:
LoaderTest() {
build_settings_.SetBuildDir(SourceDir("//out/Debug/"));
}
protected:
Scheduler scheduler_;
BuildSettings build_settings_;
MockInputFileManager mock_ifm_;
};
} // namespace
// -----------------------------------------------------------------------------
TEST_F(LoaderTest, Foo) {
SourceFile build_config("//build/config/BUILDCONFIG.gn");
build_settings_.set_build_config_file(build_config);
scoped_refptr<LoaderImpl> loader(new LoaderImpl(&build_settings_));
// The default toolchain needs to be set by the build config file.
mock_ifm_.AddCannedResponse(build_config,
"set_default_toolchain(\"//tc:tc\")");
loader->set_async_load_file(mock_ifm_.GetCallback());
// Request the root build file be loaded. This should kick off the default
// build config loading.
SourceFile root_build("//BUILD.gn");
loader->Load(root_build, LocationRange(), Label());
EXPECT_TRUE(mock_ifm_.HasOnePending(build_config));
// Completing the build config load should kick off the root build file load.
mock_ifm_.IssueAllPending();
scheduler_.main_loop()->RunUntilIdle();
EXPECT_TRUE(mock_ifm_.HasOnePending(root_build));
// Load the root build file.
mock_ifm_.IssueAllPending();
scheduler_.main_loop()->RunUntilIdle();
// Schedule some other file to load in another toolchain.
Label second_tc(SourceDir("//tc2/"), "tc2");
SourceFile second_file("//foo/BUILD.gn");
loader->Load(second_file, LocationRange(), second_tc);
EXPECT_TRUE(mock_ifm_.HasOnePending(SourceFile("//tc2/BUILD.gn")));
// Running the toolchain file should schedule the build config file to load
// for that toolchain.
mock_ifm_.IssueAllPending();
scheduler_.main_loop()->RunUntilIdle();
// We have to tell it we have a toolchain definition now (normally the
// builder would do this).
const Settings* default_settings = loader->GetToolchainSettings(Label());
Toolchain second_tc_object(default_settings, second_tc);
loader->ToolchainLoaded(&second_tc_object);
EXPECT_TRUE(mock_ifm_.HasOnePending(build_config));
// Scheduling a second file to load in that toolchain should not make it
// pending yet (it's waiting for the build config).
SourceFile third_file("//bar/BUILD.gn");
loader->Load(third_file, LocationRange(), second_tc);
EXPECT_TRUE(mock_ifm_.HasOnePending(build_config));
// Running the build config file should make our third file pending.
mock_ifm_.IssueAllPending();
scheduler_.main_loop()->RunUntilIdle();
EXPECT_TRUE(mock_ifm_.HasTwoPending(second_file, third_file));
EXPECT_FALSE(scheduler_.is_failed());
}
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