Tools/TestWebKitAPI/Tests/WTF/HexNumber.cpp

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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#include "config.h"
#include "WTFStringUtilities.h"

#include <wtf/HexNumber.h>

namespace TestWebKitAPI {

// Not using builder.toString() or builder.toStringPreserveCapacity() because they all
// change internal state of builder.
#define expectBuilderContent(expected, builder) \
    { \
        if (builder.is8Bit()) \
            EXPECT_EQ(String(expected), String(builder.characters8(), builder.length())); \
        else \
            EXPECT_EQ(String(expected), String(builder.characters16(), builder.length())); \
    } \

TEST(WTF, HexNumber)
{
    uint32_t integer = 10;
    uint32_t largeInteger = 64206;
    unsigned char byte = 128;

    {
        StringBuilder builder;
        builder.append(hex(integer));
        expectBuilderContent("A", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(integer, Lowercase));
        expectBuilderContent("a", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(integer, 1, Lowercase));
        expectBuilderContent("a", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(integer, 2, Lowercase));
        expectBuilderContent("0a", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(integer, 3, Lowercase));
        expectBuilderContent("00a", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(integer, 4, Lowercase));
        expectBuilderContent("000a", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(largeInteger));
        expectBuilderContent("FACE", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(largeInteger, 2));
        expectBuilderContent("FACE", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(byte));
        expectBuilderContent("80", builder);
    }

    {
        StringBuilder builder;
        builder.append(hex(static_cast<unsigned char>(integer), 2));
        expectBuilderContent("0A", builder);
    }
}

} // namespace