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/strings/string_util.h"
8
9#include "courgette/assembly_program.h"
10#include "courgette/courgette.h"
11#include "courgette/streams.h"
12
13#include "testing/gtest/include/gtest/gtest.h"
14
15class AdjustmentMethodTest : public testing::Test {
16 public:
17  void Test1() const;
18
19 private:
20  void SetUp() {
21  }
22
23  void TearDown() {
24  }
25
26  // Returns one of two similar a simple programs.  They differ only in the
27  // label assignment, so that it is possible to make them look identical.
28  courgette::AssemblyProgram* MakeProgram(int kind) const {
29    courgette::AssemblyProgram* prog =
30      new courgette::AssemblyProgram(courgette::EXE_WIN_32_X86);
31    prog->set_image_base(0x00400000);
32
33    courgette::Label* labelA = prog->FindOrMakeAbs32Label(0x00410000);
34    courgette::Label* labelB = prog->FindOrMakeAbs32Label(0x00410004);
35
36    EXPECT_TRUE(prog->EmitAbs32(labelA));
37    EXPECT_TRUE(prog->EmitAbs32(labelA));
38    EXPECT_TRUE(prog->EmitAbs32(labelB));
39    EXPECT_TRUE(prog->EmitAbs32(labelA));
40    EXPECT_TRUE(prog->EmitAbs32(labelA));
41    EXPECT_TRUE(prog->EmitAbs32(labelB));
42
43    if (kind == 0) {
44      labelA->index_ = 0;
45      labelB->index_ = 1;
46    } else {
47      labelA->index_ = 1;
48      labelB->index_ = 0;
49    }
50    prog->AssignRemainingIndexes();
51
52    return prog;
53  }
54
55  courgette::AssemblyProgram* MakeProgramA() const { return MakeProgram(0); }
56  courgette::AssemblyProgram* MakeProgramB() const { return MakeProgram(1); }
57
58  // Returns a string that is the serialized version of |program|.
59  // Deletes |program|.
60  std::string Serialize(courgette::AssemblyProgram *program) const {
61    courgette::EncodedProgram* encoded = NULL;
62
63    const courgette::Status encode_status = Encode(program, &encoded);
64    EXPECT_EQ(courgette::C_OK, encode_status);
65
66    DeleteAssemblyProgram(program);
67
68    courgette::SinkStreamSet sinks;
69    const courgette::Status write_status = WriteEncodedProgram(encoded, &sinks);
70    EXPECT_EQ(courgette::C_OK, write_status);
71
72    DeleteEncodedProgram(encoded);
73
74    courgette::SinkStream sink;
75    bool can_collect = sinks.CopyTo(&sink);
76    EXPECT_TRUE(can_collect);
77
78    return std::string(reinterpret_cast<const char *>(sink.Buffer()),
79                       sink.Length());
80  }
81};
82
83
84void AdjustmentMethodTest::Test1() const {
85  courgette::AssemblyProgram* prog1 = MakeProgramA();
86  courgette::AssemblyProgram* prog2 = MakeProgramB();
87  std::string s1 = Serialize(prog1);
88  std::string s2 = Serialize(prog2);
89
90  // Don't use EXPECT_EQ because strings are unprintable.
91  EXPECT_FALSE(s1 == s2);  // Unadjusted A and B differ.
92
93  courgette::AssemblyProgram* prog5 = MakeProgramA();
94  courgette::AssemblyProgram* prog6 = MakeProgramB();
95  courgette::Status can_adjust = Adjust(*prog5, prog6);
96  EXPECT_EQ(courgette::C_OK, can_adjust);
97  std::string s5 = Serialize(prog5);
98  std::string s6 = Serialize(prog6);
99
100  EXPECT_TRUE(s1 == s5);  // Adjustment did not change A (prog5)
101  EXPECT_TRUE(s5 == s6);  // Adjustment did change B into A
102}
103
104
105TEST_F(AdjustmentMethodTest, All) {
106  Test1();
107}
108