gpu/command_buffer/common/bitfield_helpers_test.cc

   1 // Copyright (c) 2009 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 // Tests for the bitfield helper class.
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "gpu/command_buffer/common/bitfield_helpers.h"
   9
  10 namespace gpu {
  11
  12 // Tests that BitField<>::Get returns the right bits.
  13 TEST(BitFieldTest, TestGet) {
  14   unsigned int value = 0x12345678u;
  15   EXPECT_EQ(0x8u, (BitField<0, 4>::Get(value)));
  16   EXPECT_EQ(0x45u, (BitField<12, 8>::Get(value)));
  17   EXPECT_EQ(0x12345678u, (BitField<0, 32>::Get(value)));
  18 }
  19
  20 // Tests that BitField<>::MakeValue generates the right bits.
  21 TEST(BitFieldTest, TestMakeValue) {
  22   EXPECT_EQ(0x00000003u, (BitField<0, 4>::MakeValue(0x3)));
  23   EXPECT_EQ(0x00023000u, (BitField<12, 8>::MakeValue(0x123)));
  24   EXPECT_EQ(0x87654321u, (BitField<0, 32>::MakeValue(0x87654321)));
  25 }
  26
  27 // Tests that BitField<>::Set modifies the right bits.
  28 TEST(BitFieldTest, TestSet) {
  29   unsigned int value = 0x12345678u;
  30   BitField<0, 4>::Set(&value, 0x9);
  31   EXPECT_EQ(0x12345679u, value);
  32   BitField<12, 8>::Set(&value, 0x123);
  33   EXPECT_EQ(0x12323679u, value);
  34   BitField<0, 32>::Set(&value, 0x87654321);
  35   EXPECT_EQ(0x87654321u, value);
  36 }
  37
  38 }  // namespace gpu