courgette/encoded_program_unittest.cc

   1 // Copyright (c) 2012 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 "courgette/encoded_program.h"
   6
   7 #include "courgette/streams.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 TEST(EncodedProgramTest, Test) {
  11   //
  12   // Create a simple program with a few addresses and references and
  13   // check that the bits produced are as expected.
  14   //
  15   courgette::EncodedProgram* program = new courgette::EncodedProgram();
  16
  17   uint32 base = 0x00900000;
  18   program->set_image_base(base);
  19
  20   EXPECT_TRUE(program->DefineRel32Label(5, 0));  // REL32 index 5 == base + 0
  21   EXPECT_TRUE(program->DefineAbs32Label(7, 4));  // ABS32 index 7 == base + 4
  22   program->EndLabels();
  23
  24   EXPECT_TRUE(program->AddOrigin(0));  // Start at base.
  25   EXPECT_TRUE(program->AddAbs32(7));
  26   EXPECT_TRUE(program->AddRel32(5));
  27
  28   // Serialize and deserialize.
  29
  30   courgette::SinkStreamSet sinks;
  31   EXPECT_TRUE(program->WriteTo(&sinks));
  32   delete program;
  33
  34   courgette::SinkStream sink;
  35   bool can_collect = sinks.CopyTo(&sink);
  36   EXPECT_TRUE(can_collect);
  37
  38   const void* buffer = sink.Buffer();
  39   size_t length = sink.Length();
  40
  41   courgette::SourceStreamSet sources;
  42   bool can_get_source_streams = sources.Init(buffer, length);
  43   EXPECT_TRUE(can_get_source_streams);
  44
  45   courgette::EncodedProgram *encoded2 = new courgette::EncodedProgram();
  46   bool can_read = encoded2->ReadFrom(&sources);
  47   EXPECT_TRUE(can_read);
  48
  49   // Finally, try to assemble.
  50   courgette::SinkStream assembled;
  51   bool can_assemble = encoded2->AssembleTo(&assembled);
  52   EXPECT_TRUE(can_assemble);
  53   delete encoded2;
  54
  55   const void* assembled_buffer = assembled.Buffer();
  56   size_t assembled_length = assembled.Length();
  57
  58   EXPECT_EQ(8U, assembled_length);
  59
  60   static const uint8 golden[] = {
  61     0x04, 0x00, 0x90, 0x00,  // ABS32 to base + 4
  62     0xF8, 0xFF, 0xFF, 0xFF   // REL32 from next line to base + 2
  63   };
  64
  65   EXPECT_EQ(0, memcmp(assembled_buffer, golden, 8));
  66 }