courgette/adjustment_method_unittest.cc

   1 // Copyright (c) 2011 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 #include <string>
   6
   7 #include "base/path_service.h"
   8 #include "base/file_util.h"
   9 #include "base/string_util.h"
  10
  11 #include "courgette/assembly_program.h"
  12 #include "courgette/courgette.h"
  13 #include "courgette/streams.h"
  14
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 class AdjustmentMethodTest : public testing::Test {
  18  public:
  19   void Test1() const;
  20
  21  private:
  22   void SetUp() {
  23   }
  24
  25   void TearDown() {
  26   }
  27
  28   // Returns one of two similar a simple programs.  They differ only in the
  29   // label assignment, so that it is possible to make them look identical.
  30   courgette::AssemblyProgram* MakeProgram(int kind) const {
  31     courgette::AssemblyProgram* prog = new courgette::AssemblyProgram();
  32     prog->set_image_base(0x00400000);
  33
  34     courgette::Label* labelA = prog->FindOrMakeAbs32Label(0x00410000);
  35     courgette::Label* labelB = prog->FindOrMakeAbs32Label(0x00410004);
  36
  37     EXPECT_TRUE(prog->EmitAbs32(labelA));
  38     EXPECT_TRUE(prog->EmitAbs32(labelA));
  39     EXPECT_TRUE(prog->EmitAbs32(labelB));
  40     EXPECT_TRUE(prog->EmitAbs32(labelA));
  41     EXPECT_TRUE(prog->EmitAbs32(labelA));
  42     EXPECT_TRUE(prog->EmitAbs32(labelB));
  43
  44     if (kind == 0) {
  45       labelA->index_ = 0;
  46       labelB->index_ = 1;
  47     } else {
  48       labelA->index_ = 1;
  49       labelB->index_ = 0;
  50     }
  51     prog->AssignRemainingIndexes();
  52
  53     return prog;
  54   }
  55
  56   courgette::AssemblyProgram* MakeProgramA() const { return MakeProgram(0); }
  57   courgette::AssemblyProgram* MakeProgramB() const { return MakeProgram(1); }
  58
  59   // Returns a string that is the serialized version of |program|.
  60   // Deletes |program|.
  61   std::string Serialize(courgette::AssemblyProgram *program) const {
  62     courgette::EncodedProgram* encoded = NULL;
  63
  64     const courgette::Status encode_status = Encode(program, &encoded);
  65     EXPECT_EQ(courgette::C_OK, encode_status);
  66
  67     DeleteAssemblyProgram(program);
  68
  69     courgette::SinkStreamSet sinks;
  70     const courgette::Status write_status = WriteEncodedProgram(encoded, &sinks);
  71     EXPECT_EQ(courgette::C_OK, write_status);
  72
  73     DeleteEncodedProgram(encoded);
  74
  75     courgette::SinkStream sink;
  76     bool can_collect = sinks.CopyTo(&sink);
  77     EXPECT_TRUE(can_collect);
  78
  79     return std::string(reinterpret_cast<const char *>(sink.Buffer()),
  80                        sink.Length());
  81   }
  82 };
  83
  84
  85 void AdjustmentMethodTest::Test1() const {
  86   courgette::AssemblyProgram* prog1 = MakeProgramA();
  87   courgette::AssemblyProgram* prog2 = MakeProgramB();
  88   std::string s1 = Serialize(prog1);
  89   std::string s2 = Serialize(prog2);
  90
  91   // Don't use EXPECT_EQ because strings are unprintable.
  92   EXPECT_FALSE(s1 == s2);  // Unadjusted A and B differ.
  93
  94   courgette::AssemblyProgram* prog5 = MakeProgramA();
  95   courgette::AssemblyProgram* prog6 = MakeProgramB();
  96   courgette::Status can_adjust = Adjust(*prog5, prog6);
  97   EXPECT_EQ(courgette::C_OK, can_adjust);
  98   std::string s5 = Serialize(prog5);
  99   std::string s6 = Serialize(prog6);
 100
 101   EXPECT_TRUE(s1 == s5);  // Adjustment did not change A (prog5)
 102   EXPECT_TRUE(s5 == s6);  // Adjustment did change B into A
 103 }
 104
 105
 106 TEST_F(AdjustmentMethodTest, All) {
 107   Test1();
 108 }