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/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
  15 class 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 = new courgette::AssemblyProgram();
  30     prog->set_image_base(0x00400000);
  31
  32     courgette::Label* labelA = prog->FindOrMakeAbs32Label(0x00410000);
  33     courgette::Label* labelB = prog->FindOrMakeAbs32Label(0x00410004);
  34
  35     EXPECT_TRUE(prog->EmitAbs32(labelA));
  36     EXPECT_TRUE(prog->EmitAbs32(labelA));
  37     EXPECT_TRUE(prog->EmitAbs32(labelB));
  38     EXPECT_TRUE(prog->EmitAbs32(labelA));
  39     EXPECT_TRUE(prog->EmitAbs32(labelA));
  40     EXPECT_TRUE(prog->EmitAbs32(labelB));
  41
  42     if (kind == 0) {
  43       labelA->index_ = 0;
  44       labelB->index_ = 1;
  45     } else {
  46       labelA->index_ = 1;
  47       labelB->index_ = 0;
  48     }
  49     prog->AssignRemainingIndexes();
  50
  51     return prog;
  52   }
  53
  54   courgette::AssemblyProgram* MakeProgramA() const { return MakeProgram(0); }
  55   courgette::AssemblyProgram* MakeProgramB() const { return MakeProgram(1); }
  56
  57   // Returns a string that is the serialized version of |program|.
  58   // Deletes |program|.
  59   std::string Serialize(courgette::AssemblyProgram *program) const {
  60     courgette::EncodedProgram* encoded = NULL;
  61
  62     const courgette::Status encode_status = Encode(program, &encoded);
  63     EXPECT_EQ(courgette::C_OK, encode_status);
  64
  65     DeleteAssemblyProgram(program);
  66
  67     courgette::SinkStreamSet sinks;
  68     const courgette::Status write_status = WriteEncodedProgram(encoded, &sinks);
  69     EXPECT_EQ(courgette::C_OK, write_status);
  70
  71     DeleteEncodedProgram(encoded);
  72
  73     courgette::SinkStream sink;
  74     bool can_collect = sinks.CopyTo(&sink);
  75     EXPECT_TRUE(can_collect);
  76
  77     return std::string(reinterpret_cast<const char *>(sink.Buffer()),
  78                        sink.Length());
  79   }
  80 };
  81
  82
  83 void AdjustmentMethodTest::Test1() const {
  84   courgette::AssemblyProgram* prog1 = MakeProgramA();
  85   courgette::AssemblyProgram* prog2 = MakeProgramB();
  86   std::string s1 = Serialize(prog1);
  87   std::string s2 = Serialize(prog2);
  88
  89   // Don't use EXPECT_EQ because strings are unprintable.
  90   EXPECT_FALSE(s1 == s2);  // Unadjusted A and B differ.
  91
  92   courgette::AssemblyProgram* prog5 = MakeProgramA();
  93   courgette::AssemblyProgram* prog6 = MakeProgramB();
  94   courgette::Status can_adjust = Adjust(*prog5, prog6);
  95   EXPECT_EQ(courgette::C_OK, can_adjust);
  96   std::string s5 = Serialize(prog5);
  97   std::string s6 = Serialize(prog6);
  98
  99   EXPECT_TRUE(s1 == s5);  // Adjustment did not change A (prog5)
 100   EXPECT_TRUE(s5 == s6);  // Adjustment did change B into A
 101 }
 102
 103
 104 TEST_F(AdjustmentMethodTest, All) {
 105   Test1();
 106 }