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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef TOOLS_GN_TEST_WITH_SCOPE_H_
      6 #define TOOLS_GN_TEST_WITH_SCOPE_H_
      7 
      8 #include <vector>
      9 
     10 #include "base/basictypes.h"
     11 #include "tools/gn/build_settings.h"
     12 #include "tools/gn/err.h"
     13 #include "tools/gn/input_file.h"
     14 #include "tools/gn/parse_tree.h"
     15 #include "tools/gn/scope.h"
     16 #include "tools/gn/settings.h"
     17 #include "tools/gn/token.h"
     18 #include "tools/gn/toolchain.h"
     19 #include "tools/gn/value.h"
     20 
     21 // A helper class for setting up a Scope that a test can use. It makes a
     22 // toolchain and sets up all the build state.
     23 class TestWithScope {
     24  public:
     25   TestWithScope();
     26   ~TestWithScope();
     27 
     28   BuildSettings* build_settings() { return &build_settings_; }
     29   Settings* settings() { return &settings_; }
     30   Toolchain* toolchain() { return &toolchain_; }
     31   Scope* scope() { return &scope_; }
     32 
     33   // This buffer accumulates output from any print() commands executed in the
     34   // context of this test. Note that the implementation of this is not
     35   // threadsafe so don't write tests that call print from multiple threads.
     36   std::string& print_output() { return print_output_; }
     37 
     38   // Fills in the tools for the given toolchain with reasonable default values.
     39   // The toolchain in this object will be automatically set up with this
     40   // function, it is exposed to allow tests to get the same functionality for
     41   // other toolchains they make
     42   static void SetupToolchain(Toolchain* toolchain);
     43 
     44  private:
     45   void AppendPrintOutput(const std::string& str);
     46 
     47   BuildSettings build_settings_;
     48   Settings settings_;
     49   Toolchain toolchain_;
     50   Scope scope_;
     51 
     52   std::string print_output_;
     53 
     54   DISALLOW_COPY_AND_ASSIGN(TestWithScope);
     55 };
     56 
     57 // Helper class to treat some string input as a file.
     58 //
     59 // Instantiate it with the contents you want, be sure to check for error, and
     60 // then you can execute the ParseNode or whatever.
     61 class TestParseInput {
     62  public:
     63   TestParseInput(const std::string& input);
     64   ~TestParseInput();
     65 
     66   // Indicates whether and what error occurred during tokenizing and parsing.
     67   bool has_error() const { return parse_err_.has_error(); }
     68   const Err& parse_err() const { return parse_err_; }
     69 
     70   const InputFile& input_file() const { return input_file_; }
     71   const std::vector<Token>& tokens() const { return tokens_; }
     72   const ParseNode* parsed() const { return parsed_.get(); }
     73 
     74  private:
     75   InputFile input_file_;
     76 
     77   std::vector<Token> tokens_;
     78   scoped_ptr<ParseNode> parsed_;
     79 
     80   Err parse_err_;
     81 
     82   DISALLOW_COPY_AND_ASSIGN(TestParseInput);
     83 };
     84 
     85 #endif  // TOOLS_GN_TEST_WITH_SCOPE_H_
     86