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#include <lineprefixer.h>
#include <utf8string.h>

#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "gtest-qt-printing.h"

namespace {

QByteArray runPrefixer(QList<QByteArray> inputChunks)
{
    QByteArray actualOutput;
    ClangBackEnd::LinePrefixer prefixer("PREFIX ");
    foreach (const QByteArray &chunk, inputChunks)
        actualOutput += prefixer.prefix(chunk);
    return actualOutput;
}

TEST(LinePrefixer, OneChunkEndsWithNewline)
{
    const QList<QByteArray> inputChunks { "hello\n" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX hello\n"));
}

TEST(LinePrefixer, OneChunkEndsWithoutNewline)
{
    const QList<QByteArray> inputChunks { "hello" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX hello"));
}

TEST(LinePrefixer, OneChunkStartsWithNewline)
{
    const QList<QByteArray> inputChunks { "\nhello" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX \n"
                                     "PREFIX hello"));
}

TEST(LinePrefixer, OneChunkStartsAndEndsWithNewline)
{
    const QList<QByteArray> inputChunks { "\nhello\n" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX \n"
                                     "PREFIX hello\n"));
}

TEST(LinePrefixer, OneChunkEndsWithExtraNewline)
{
    const QList<QByteArray> inputChunks { "hello\n\n" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX hello\n"
                                     "PREFIX \n"));
}

TEST(LinePrefixer, OneChunkEndsWithTwoExtraNewlines)
{
    const QList<QByteArray> inputChunks { "hello\n\n\n" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX hello\n"
                                     "PREFIX \n"
                                     "PREFIX \n"));
}

TEST(LinePrefixer, ChunkWithoutNewlineAndChunkWithNewline)
{
    const QList<QByteArray> inputChunks { "hello", "\n" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX hello\n"));
}

TEST(LinePrefixer, ChunkWithoutNewlineAndChunkWithTwoNewlines)
{
    const QList<QByteArray> inputChunks { "hello", "\n\n" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX hello\n"
                                     "PREFIX \n"));
}

TEST(LinePrefixer, ChunkWithTwoNewlinesAndChunkWithoutNewline)
{
    const QList<QByteArray> inputChunks { "\n\n", "hello" };
    ASSERT_THAT(Utf8String::fromByteArray(runPrefixer(inputChunks)),
                Utf8String::fromUtf8("PREFIX \n"
                                     "PREFIX \n"
                                     "PREFIX hello"));
}

} // anonymous namespace