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      1 // Copyright 2014 the V8 project 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 "include/v8stdint.h"
      6 #include "src/base/flags.h"
      7 #include "testing/gtest/include/gtest/gtest.h"
      8 
      9 namespace v8 {
     10 namespace base {
     11 
     12 namespace {
     13 
     14 enum Flag1 {
     15   kFlag1None = 0,
     16   kFlag1First = 1u << 1,
     17   kFlag1Second = 1u << 2,
     18   kFlag1All = kFlag1None | kFlag1First | kFlag1Second
     19 };
     20 typedef Flags<Flag1> Flags1;
     21 
     22 
     23 DEFINE_OPERATORS_FOR_FLAGS(Flags1)
     24 
     25 
     26 Flags1 bar(Flags1 flags1) { return flags1; }
     27 
     28 }  // namespace
     29 
     30 
     31 TEST(FlagsTest, BasicOperations) {
     32   Flags1 a;
     33   EXPECT_EQ(kFlag1None, static_cast<int>(a));
     34   a |= kFlag1First;
     35   EXPECT_EQ(kFlag1First, static_cast<int>(a));
     36   a = a | kFlag1Second;
     37   EXPECT_EQ(kFlag1All, static_cast<int>(a));
     38   a &= kFlag1Second;
     39   EXPECT_EQ(kFlag1Second, static_cast<int>(a));
     40   a = kFlag1None & a;
     41   EXPECT_EQ(kFlag1None, static_cast<int>(a));
     42   a ^= (kFlag1All | kFlag1None);
     43   EXPECT_EQ(kFlag1All, static_cast<int>(a));
     44   Flags1 b = ~a;
     45   EXPECT_EQ(kFlag1All, static_cast<int>(a));
     46   EXPECT_EQ(~static_cast<int>(a), static_cast<int>(b));
     47   Flags1 c = a;
     48   EXPECT_EQ(a, c);
     49   EXPECT_NE(a, b);
     50   EXPECT_EQ(a, bar(a));
     51   EXPECT_EQ(a, bar(kFlag1All));
     52 }
     53 
     54 
     55 namespace {
     56 namespace foo {
     57 
     58 enum Option {
     59   kNoOptions = 0,
     60   kOption1 = 1,
     61   kOption2 = 2,
     62   kAllOptions = kNoOptions | kOption1 | kOption2
     63 };
     64 typedef Flags<Option> Options;
     65 
     66 }  // namespace foo
     67 
     68 
     69 DEFINE_OPERATORS_FOR_FLAGS(foo::Options)
     70 
     71 }  // namespace
     72 
     73 
     74 TEST(FlagsTest, NamespaceScope) {
     75   foo::Options options;
     76   options ^= foo::kNoOptions;
     77   options |= foo::kOption1 | foo::kOption2;
     78   EXPECT_EQ(foo::kAllOptions, static_cast<int>(options));
     79 }
     80 
     81 
     82 namespace {
     83 
     84 struct Foo {
     85   enum Enum { kEnum1 = 1, kEnum2 = 2 };
     86   typedef Flags<Enum, uint32_t> Enums;
     87 };
     88 
     89 
     90 DEFINE_OPERATORS_FOR_FLAGS(Foo::Enums)
     91 
     92 }  // namespace
     93 
     94 
     95 TEST(FlagsTest, ClassScope) {
     96   Foo::Enums enums;
     97   enums |= Foo::kEnum1;
     98   enums |= Foo::kEnum2;
     99   EXPECT_TRUE(enums & Foo::kEnum1);
    100   EXPECT_TRUE(enums & Foo::kEnum2);
    101 }
    102 
    103 }  // namespace base
    104 }  // namespace v8
    105