tools/gn/test_with_scope.h

   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   explicit 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_