Tools/TestWebKitAPI/Tests/WTF/OptionCountedSet.cpp

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#include "config.h"

#include "Test.h"
#include <wtf/OptionCountedSet.h>

namespace TestWebKitAPI {

enum class ExampleFlags : uint32_t {
    A = 1 << 0,
    B = 1 << 1,
    C = 1 << 2,
};

TEST(WTF_OptionCountedSet, EmptySet)
{
    OptionCountedSet<ExampleFlags> set;
    EXPECT_TRUE(set.isEmpty());
    EXPECT_FALSE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));
    set.add({ ExampleFlags::C, ExampleFlags::B });
    EXPECT_FALSE(set.isEmpty());
    EXPECT_FALSE(set.contains(ExampleFlags::A));
    EXPECT_TRUE(set.contains(ExampleFlags::B));
    EXPECT_TRUE(set.contains(ExampleFlags::C));
}

TEST(WTF_OptionCountedSet, AddAndRemove)
{
    OptionCountedSet<ExampleFlags> set;
    set.add(ExampleFlags::A);
    EXPECT_TRUE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));

    // Adding the same flag increments the counter.
    set.add(ExampleFlags::A);
    EXPECT_TRUE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));

    // Removing the flag added twice decrements the counter.
    set.remove(ExampleFlags::A);
    EXPECT_TRUE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));

    // Removing again makes the flag not present anymore.
    set.remove(ExampleFlags::A);
    EXPECT_FALSE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));

    // Remove again does nothing.
    set.remove(ExampleFlags::A);
    EXPECT_FALSE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));

    // Add multiple flags.
    set.add({ ExampleFlags::B, ExampleFlags::C });
    EXPECT_FALSE(set.contains(ExampleFlags::A));
    EXPECT_TRUE(set.contains(ExampleFlags::B));
    EXPECT_TRUE(set.contains(ExampleFlags::C));
    set.add({ ExampleFlags::A, ExampleFlags::C });
    EXPECT_TRUE(set.contains(ExampleFlags::A));
    EXPECT_TRUE(set.contains(ExampleFlags::B));
    EXPECT_TRUE(set.contains(ExampleFlags::C));

    // Remove multiple flags.
    set.remove({ ExampleFlags::B, ExampleFlags::C });
    EXPECT_TRUE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_TRUE(set.contains(ExampleFlags::C));
    set.remove({ ExampleFlags::A, ExampleFlags::C });
    EXPECT_FALSE(set.contains(ExampleFlags::A));
    EXPECT_FALSE(set.contains(ExampleFlags::B));
    EXPECT_FALSE(set.contains(ExampleFlags::C));
}

} // namespace TestWebKitAPI