1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162


base / sequence_token_unittest.cc [blame]

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/sequence_token.h"

#include "testing/gtest/include/gtest/gtest.h"

namespace base::internal {

TEST(SequenceTokenTest, IsValid) {
  EXPECT_FALSE(SequenceToken().IsValid());
  EXPECT_TRUE(SequenceToken::Create().IsValid());
}

TEST(SequenceTokenTest, OperatorEquals) {
  const SequenceToken invalid_a;
  const SequenceToken invalid_b;
  const SequenceToken valid_a = SequenceToken::Create();
  const SequenceToken valid_b = SequenceToken::Create();

  EXPECT_FALSE(invalid_a == invalid_a);
  EXPECT_FALSE(invalid_a == invalid_b);
  EXPECT_FALSE(invalid_a == valid_a);
  EXPECT_FALSE(invalid_a == valid_b);

  EXPECT_FALSE(valid_a == invalid_a);
  EXPECT_FALSE(valid_a == invalid_b);
  EXPECT_EQ(valid_a, valid_a);
  EXPECT_FALSE(valid_a == valid_b);
}

TEST(SequenceTokenTest, OperatorNotEquals) {
  const SequenceToken invalid_a;
  const SequenceToken invalid_b;
  const SequenceToken valid_a = SequenceToken::Create();
  const SequenceToken valid_b = SequenceToken::Create();

  EXPECT_NE(invalid_a, invalid_a);
  EXPECT_NE(invalid_a, invalid_b);
  EXPECT_NE(invalid_a, valid_a);
  EXPECT_NE(invalid_a, valid_b);

  EXPECT_NE(valid_a, invalid_a);
  EXPECT_NE(valid_a, invalid_b);
  EXPECT_FALSE(valid_a != valid_a);
  EXPECT_NE(valid_a, valid_b);
}

TEST(SequenceTokenTest, GetForCurrentThread) {
  const SequenceToken token = SequenceToken::Create();

  EXPECT_TRUE(SequenceToken::GetForCurrentThread().IsValid());

  {
    TaskScope task_scope(token, /* is_thread_bound=*/false);
    EXPECT_TRUE(SequenceToken::GetForCurrentThread().IsValid());
    EXPECT_EQ(token, SequenceToken::GetForCurrentThread());
  }

  EXPECT_TRUE(SequenceToken::GetForCurrentThread().IsValid());
}

TEST(SequenceTokenTest, ToInternalValue) {
  const SequenceToken token1 = SequenceToken::Create();
  const SequenceToken token2 = SequenceToken::Create();

  // Confirm that internal values are unique.
  EXPECT_NE(token1.ToInternalValue(), token2.ToInternalValue());
}

// Expect a default-constructed TaskToken to be invalid and not equal to
// another invalid TaskToken.
TEST(TaskTokenTest, InvalidDefaultConstructed) {
  EXPECT_FALSE(TaskToken().IsValid());
  EXPECT_NE(TaskToken(), TaskToken());
}

// Expect a TaskToken returned by TaskToken::GetForCurrentThread() outside the
// scope of a TaskScope to be invalid.
TEST(TaskTokenTest, InvalidOutsideScope) {
  EXPECT_FALSE(TaskToken::GetForCurrentThread().IsValid());
}

// Expect an invalid TaskToken not to be equal with a valid TaskToken.
TEST(TaskTokenTest, ValidNotEqualsInvalid) {
  TaskScope task_scope(SequenceToken::Create(),
                       /* is_thread_bound=*/false);
  TaskToken valid = TaskToken::GetForCurrentThread();
  TaskToken invalid;
  EXPECT_NE(valid, invalid);
}

// Expect TaskTokens returned by TaskToken::GetForCurrentThread() in the scope
// of the same TaskScope instance to be
// valid and equal with each other.
TEST(TaskTokenTest, EqualInSameScope) {
  TaskScope task_scope(SequenceToken::Create(),
                       /* is_thread_bound=*/false);

  const TaskToken token_a = TaskToken::GetForCurrentThread();
  const TaskToken token_b = TaskToken::GetForCurrentThread();

  EXPECT_TRUE(token_a.IsValid());
  EXPECT_TRUE(token_b.IsValid());
  EXPECT_EQ(token_a, token_b);
}

// Expect TaskTokens returned by TaskToken::GetForCurrentThread() in the scope
// of different TaskScope instances to be
// valid but not equal to each other.
TEST(TaskTokenTest, NotEqualInDifferentScopes) {
  TaskToken token_a;
  TaskToken token_b;

  {
    TaskScope task_scope(SequenceToken::Create(),
                         /* is_thread_bound=*/false);
    token_a = TaskToken::GetForCurrentThread();
  }
  {
    TaskScope task_scope(SequenceToken::Create(),
                         /* is_thread_bound=*/false);
    token_b = TaskToken::GetForCurrentThread();
  }

  EXPECT_TRUE(token_a.IsValid());
  EXPECT_TRUE(token_b.IsValid());
  EXPECT_NE(token_a, token_b);
}

TEST(TaskScopeTest, ThreadBound) {
  // Code running outside of a `TaskScope` is thread-bound.
  EXPECT_TRUE(CurrentTaskIsThreadBound());

  {
    TaskScope scope(SequenceToken::Create(), /* is_thread_bound=*/false);
    EXPECT_FALSE(CurrentTaskIsThreadBound());
    {
      TaskScope inner_scope(SequenceToken::Create(), /* is_thread_bound=*/true);
      EXPECT_TRUE(CurrentTaskIsThreadBound());
    }
    EXPECT_FALSE(CurrentTaskIsThreadBound());
  }

  EXPECT_TRUE(CurrentTaskIsThreadBound());

  {
    TaskScope scope(SequenceToken::Create(), /* is_thread_bound=*/true);
    EXPECT_TRUE(CurrentTaskIsThreadBound());
    {
      TaskScope inner_scope(SequenceToken::Create(),
                            /* is_thread_bound=*/false);
      EXPECT_FALSE(CurrentTaskIsThreadBound());
    }
    EXPECT_TRUE(CurrentTaskIsThreadBound());
  }

  EXPECT_TRUE(CurrentTaskIsThreadBound());
}

}  // namespace base::internal