qt-creator/tests/unit/unittest/smallstringtest.cpp

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**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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#include "gtest/gtest.h"
#include "gmock/gmock-matchers.h"
#include "gtest-qt-printing.h"

#include <QString>

#include <utils/smallstringvector.h>

#include <utils/smallstring.h>

#ifndef __cpp_constexpr
#define constexpr
#endif

using namespace ::testing;

using Utils::SmallString;
using Utils::SmallStringLiteral;
using Utils::SmallStringView;

TEST(SmallString, BasicStringEqual)
{
    ASSERT_THAT(SmallString("text"), Eq(SmallString("text")));
}

TEST(SmallString, BasicSmallStringUnequal)
{
    ASSERT_THAT(SmallString("text"), Ne(SmallString("other text")));
}

TEST(SmallString, NullSmallStringIsEqualToEmptySmallString)
{
    ASSERT_THAT(SmallString(), Eq(SmallString("")));
}

TEST(SmallString, ShortSmallStringLiteralIsShortSmallString)
{
    constexpr SmallStringLiteral shortText("short string");

#if __cpp_constexpr >= 201304
    ASSERT_TRUE(shortText.isShortString());
#else
    ASSERT_TRUE(shortText.isReadOnlyReference());
#endif
}

TEST(SmallString, ShortSmallStringIsShortSmallString)
{
    SmallString shortText("short string");

#if __cpp_constexpr >= 201304
    ASSERT_TRUE(shortText.isShortString());
#else
    ASSERT_TRUE(shortText.isReadOnlyReference());
#endif
}

TEST(SmallString, ShortSmallStringIsReference)
{
    SmallString longText("very very very very very long text");

    ASSERT_TRUE(longText.isReadOnlyReference());
}

TEST(SmallString, SmallStringContructorIsNotReference)
{
    const char *shortCSmallString = "short string";
    auto shortText = SmallString(shortCSmallString);

    ASSERT_TRUE(shortText.isShortString());
}

TEST(SmallString, ShortSmallStringIsNotReference)
{
    const char *shortCSmallString = "short string";
    auto shortText = SmallString::fromUtf8(shortCSmallString);

    ASSERT_FALSE(shortText.isReadOnlyReference());
}

TEST(SmallString, LongSmallStringConstrutorIsAllocated)
{
    const char *longCSmallString = "very very very very very long text";
    auto longText = SmallString(longCSmallString);

    ASSERT_TRUE(longText.hasAllocatedMemory());
}

TEST(SmallString, MaximumShortSmallString)
{
    SmallString maximumShortText("very very very very short text", 30);

    ASSERT_THAT(maximumShortText.constData(), StrEq("very very very very short text"));
}

TEST(SmallString, LongConstExpressionSmallStringIsReference)
{
    SmallString longText("very very very very very very very very very very very long string");

    ASSERT_TRUE(longText.isReadOnlyReference());
}

TEST(SmallString, CloneShortSmallString)
{
    SmallString shortText("short string");

    auto clonedText = shortText.clone();

    ASSERT_THAT(clonedText, Eq("short string"));
}

TEST(SmallString, CloneLongSmallString)
{
    SmallString longText = SmallString::fromUtf8("very very very very very very very very very very very long string");

    auto clonedText = longText.clone();

    ASSERT_THAT(clonedText, Eq("very very very very very very very very very very very long string"));
}

TEST(SmallString, ClonedLongSmallStringDataPointerIsDifferent)
{
    SmallString longText = SmallString::fromUtf8("very very very very very very very very very very very long string");

    auto clonedText = longText.clone();

    ASSERT_THAT(clonedText.data(), Ne(longText.data()));
}

TEST(SmallString, CopyShortConstExpressionSmallStringIsShortSmallString)
{
    SmallString shortText("short string");

    auto shortTextCopy = shortText;

#if __cpp_constexpr >= 201304
    ASSERT_TRUE(shortTextCopy.isShortString());
#else
    ASSERT_TRUE(shortTextCopy.isReadOnlyReference());
#endif
}

TEST(SmallString, CopyLongConstExpressionSmallStringIsLongSmallString)
{
    SmallString longText("very very very very very very very very very very very long string");

    auto longTextCopy = longText;

    ASSERT_FALSE(longTextCopy.isShortString());
}

TEST(SmallString, SmallStringFromCharacterArrayIsReference)
{
    const char longCString[] = "very very very very very very very very very very very long string";

    SmallString longString(longCString);

    ASSERT_TRUE(longString.isReadOnlyReference());
}

TEST(SmallString, SmallStringFromCharacterPointerIsNotReference)
{
    const char *longCString = "very very very very very very very very very very very long string";

    SmallString longString = SmallString::fromUtf8(longCString);

    ASSERT_FALSE(longString.isReadOnlyReference());
}

TEST(SmallString, CopyStringFromReference)
{
    SmallString longText("very very very very very very very very very very very long string");
    SmallString longTextCopy;

    longTextCopy = longText;

    ASSERT_TRUE(longTextCopy.isReadOnlyReference());
}

TEST(SmallString, SmallStringLiteralShortSmallStringDataAccess)
{
    SmallStringLiteral literalText("very very very very very very very very very very very long string");

    ASSERT_THAT(literalText.data(), StrEq("very very very very very very very very very very very long string"));
}

TEST(SmallString, SmallStringLiteralLongSmallStringDataAccess)
{
    SmallStringLiteral literalText("short string");

    ASSERT_THAT(literalText.data(), StrEq("short string"));
}

TEST(SmallString, ReferenceDataAccess)
{
    SmallString literalText("short string");

    ASSERT_THAT(literalText.constData(), StrEq("short string"));
}

TEST(SmallString, ShortDataAccess)
{
    const char *shortCString = "short string";
    auto shortText = SmallString::fromUtf8(shortCString);

    ASSERT_THAT(shortText.constData(), StrEq("short string"));
}

TEST(SmallString, LongDataAccess)
{
    const char *longCString = "very very very very very very very very very very very long string";
    auto longText = SmallString::fromUtf8(longCString);

    ASSERT_THAT(longText.constData(), StrEq(longCString));
}

TEST(SmallString, LongSmallStringHasShortSmallStringSizeZero)
{
    auto longText = SmallString::fromUtf8("very very very very very very very very very very very long string");

    ASSERT_THAT(longText.shortStringSize(), 0);
}

TEST(SmallString, BeginIsEqualEndForEmptySmallString)
{
    SmallString text;

    ASSERT_THAT(text.begin(), Eq(text.end()));
}

TEST(SmallString, BeginIsNotEqualEndForNonEmptySmallString)
{
    SmallString text("x");

    ASSERT_THAT(text.begin(), Ne(text.end()));
}

TEST(SmallString, BeginPlusOneIsEqualEndForSmallStringWidthSizeOne)
{
    SmallString text("x");

    auto beginPlusOne = text.begin() + 1l;

    ASSERT_THAT(beginPlusOne, Eq(text.end()));
}

TEST(SmallString, RBeginIsEqualREndForEmptySmallString)
{
    SmallString text;

    ASSERT_THAT(text.rbegin(), Eq(text.rend()));
}

TEST(SmallString, RBeginIsNotEqualREndForNonEmptySmallString)
{
    SmallString text("x");

    ASSERT_THAT(text.rbegin(), Ne(text.rend()));
}

TEST(SmallString, RBeginPlusOneIsEqualREndForSmallStringWidthSizeOne)
{
    SmallString text("x");

    auto beginPlusOne = text.rbegin() + 1l;

    ASSERT_THAT(beginPlusOne, Eq(text.rend()));
}

TEST(SmallString, ToQString)
{
    SmallString text("short string");

    auto qStringText = text;

    ASSERT_THAT(qStringText, QStringLiteral("short string"));
}

TEST(SmallString, FromQString)
{
    QString qStringText = QStringLiteral("short string");

    auto text = SmallString::fromQString(qStringText);

    ASSERT_THAT(text, SmallString("short string"));
}


TEST(SmallString, FromQByteArray)
{
    QByteArray qByteArray = QByteArrayLiteral("short string");

    auto text = SmallString::fromQByteArray(qByteArray);

    ASSERT_THAT(text, SmallString("short string"));
}

TEST(SmallString, MidOneParameter)
{
    SmallString text("some text");

    auto midString = text.mid(5);

    ASSERT_THAT(midString, Eq(SmallString("text")));
}

TEST(SmallString, MidTwoParameter)
{
    SmallString text("some text and more");

    auto midString = text.mid(5, 4);

    ASSERT_THAT(midString, Eq(SmallString("text")));
}

TEST(SmallString, SizeOfEmptyStringl)
{
    SmallString emptyString;

    auto size = emptyString.size();

    ASSERT_THAT(size, 0);
}

TEST(SmallString, SizeShortSmallStringLiteral)
{
    SmallStringLiteral shortText("text");

    auto size = shortText.size();

    ASSERT_THAT(size, 4);
}

TEST(SmallString, SizeLongSmallStringLiteral)
{
    auto longText = SmallStringLiteral("very very very very very very very very very very very long string");

    auto size = longText.size();

    ASSERT_THAT(size, 66);
}

TEST(SmallString, SizeReference)
{
    SmallString shortText("text");

    auto size = shortText.size();

    ASSERT_THAT(size, 4);
}

TEST(SmallString, SizeShortSmallString)
{
    SmallString shortText("text", 4);

    auto size = shortText.size();

    ASSERT_THAT(size, 4);
}

TEST(SmallString, SizeLongSmallString)
{
    auto longText = SmallString::fromUtf8("very very very very very very very very very very very long string");

    auto size = longText.size();

    ASSERT_THAT(size, 66);
}

TEST(SmallString, CapacityReference)
{
    SmallString shortText("very very very very very very very long string");

    auto capacity = shortText.capacity();

    ASSERT_THAT(capacity, 0);
}

TEST(SmallString, CapacityShortSmallString)
{
    SmallString shortText("text", 4);

    auto capacity = shortText.capacity();

    ASSERT_THAT(capacity, 30);
}

TEST(SmallString, CapacityLongSmallString)
{
    auto longText = SmallString::fromUtf8("very very very very very very very very very very very long string");

    auto capacity = longText.capacity();

    ASSERT_THAT(capacity, 66);
}

TEST(SmallString, FitsNotInCapacityBecauseNullSmallStringIsAShortSmallString)
{
    SmallString text;

    ASSERT_FALSE(text.fitsNotInCapacity(30));
}

TEST(SmallString, FitsNotInCapacityBecauseItIsReference)
{
    SmallString text("very very very very very very very long string");

    ASSERT_TRUE(text.fitsNotInCapacity(1));
}

TEST(SmallString, FitsInShortSmallStringCapacity)
{
    SmallString text("text", 4);

    ASSERT_FALSE(text.fitsNotInCapacity(30));
}

TEST(SmallString, FitsInNotShortSmallStringCapacity)
{
    SmallString text("text", 4);

    ASSERT_TRUE(text.fitsNotInCapacity(31));
}

TEST(SmallString, FitsInLongSmallStringCapacity)
{
    SmallString text = SmallString::fromUtf8("very very very very very very long string");

    ASSERT_FALSE(text.fitsNotInCapacity(33)) << text.capacity();
}

TEST(SmallString, FitsNotInLongSmallStringCapacity)
{
    SmallString text = SmallString::fromUtf8("very very very very very very long string");

    ASSERT_TRUE(text.fitsNotInCapacity(65)) << text.capacity();
}

TEST(SmallString, AppendNullSmallString)
{
    SmallString text("text");

    text.append(SmallString());

    ASSERT_THAT(text, SmallString("text"));
}

TEST(SmallString, AppendEmptySmallString)
{
    SmallString text("text");

    text.append(SmallString(""));

    ASSERT_THAT(text, SmallString("text"));
}


TEST(SmallString, AppendShortSmallString)
{
    SmallString text("some ");

    text.append(SmallString("text"));

    ASSERT_THAT(text, SmallString("some text"));
}

TEST(SmallString, AppendLongSmallString)
{
    SmallString longText("some very very very very very very very very very very very long string");
    longText.append(SmallString(" text"));

    ASSERT_THAT(longText, SmallString("some very very very very very very very very very very very long string text"));
}

TEST(SmallString, ToByteArray)
{
    SmallString text("some text");

    ASSERT_THAT(text.toQByteArray(), QByteArrayLiteral("some text"));
}

TEST(SmallString, Contains)
{
    SmallString text("some text");

    ASSERT_TRUE(text.contains(SmallString("text")));
    ASSERT_TRUE(text.contains("text"));
    ASSERT_TRUE(text.contains('x'));
}

TEST(SmallString, NotContains)
{
    SmallString text("some text");

    ASSERT_FALSE(text.contains(SmallString("textTwo")));
    ASSERT_FALSE(text.contains("foo"));
    ASSERT_FALSE(text.contains('q'));
}

TEST(SmallString, EqualSmallStringOperator)
{
    ASSERT_TRUE(SmallString() == SmallString(""));
    ASSERT_FALSE(SmallString() == SmallString("text"));
    ASSERT_TRUE(SmallString("text") == SmallString("text"));
    ASSERT_FALSE(SmallString("text") == SmallString("text2"));
}

TEST(SmallString, EqualCStringArrayOperator)
{
    ASSERT_TRUE(SmallString() == "");
    ASSERT_FALSE(SmallString() == "text");
    ASSERT_TRUE(SmallString("text") == "text");
    ASSERT_FALSE(SmallString("text") == "text2");
}

TEST(SmallString, EqualCStringPointerOperator)
{
    ASSERT_TRUE(SmallString("text") == SmallString("text").data());
    ASSERT_FALSE(SmallString("text") == SmallString("text2").data());
}

TEST(SmallString, EqualSmallStringViewOperator)
{
    ASSERT_TRUE(SmallString("text") == SmallStringView("text"));
    ASSERT_FALSE(SmallString("text") == SmallStringView("text2"));
}

TEST(SmallString, EqualSmallStringViewsOperator)
{
    ASSERT_TRUE(SmallStringView("text") == SmallStringView("text"));
    ASSERT_FALSE(SmallStringView("text") == SmallStringView("text2"));
}

TEST(SmallString, UnequalOperator)
{
    ASSERT_FALSE(SmallString("text") != SmallString("text"));
    ASSERT_TRUE(SmallString("text") != SmallString("text2"));
}

TEST(SmallString, UnequalCStringArrayOperator)
{
    ASSERT_FALSE(SmallString("text") != "text");
    ASSERT_TRUE(SmallString("text") != "text2");
}

TEST(SmallString, UnequalCStringPointerOperator)
{
    ASSERT_FALSE(SmallString("text") != SmallString("text").data());
    ASSERT_TRUE(SmallString("text") != SmallString("text2").data());
}

TEST(SmallString, UnequalSmallStringViewArrayOperator)
{
    ASSERT_FALSE(SmallString("text") != SmallStringView("text"));
    ASSERT_TRUE(SmallString("text") != SmallStringView("text2"));
}

TEST(SmallString, UnequalSmallStringViewsArrayOperator)
{
    ASSERT_FALSE(SmallStringView("text") != SmallStringView("text"));
    ASSERT_TRUE(SmallStringView("text") != SmallStringView("text2"));
}

TEST(SmallString, SmallerOperator)
{
    ASSERT_TRUE(SmallString() < SmallString("text"));
    ASSERT_TRUE(SmallString("some") < SmallString("text"));
    ASSERT_TRUE(SmallString("text") < SmallString("texta"));
    ASSERT_FALSE(SmallString("texta") < SmallString("text"));
    ASSERT_FALSE(SmallString("text") < SmallString("some"));
    ASSERT_FALSE(SmallString("text") < SmallString("text"));
}

TEST(SmallString, IsEmpty)
{
    ASSERT_FALSE(SmallString("text").isEmpty());
    ASSERT_TRUE(SmallString("").isEmpty());
    ASSERT_TRUE(SmallString().isEmpty());
}

TEST(SmallString, HasContent)
{
    ASSERT_TRUE(SmallString("text").hasContent());
    ASSERT_FALSE(SmallString("").hasContent());
    ASSERT_FALSE(SmallString().hasContent());
}

TEST(SmallString, Clear)
{
    SmallString text("text");

    text.clear();

    ASSERT_TRUE(text.isEmpty());
}

TEST(SmallString, ReplaceWithEqualSizedText)
{
    SmallString text("here is some text");

    text.replace("some", "much");

    ASSERT_THAT(text, SmallString("here is much text"));
}

TEST(SmallString, ReplaceWithEqualSizedTextOnEmptyText)
{
    SmallString text;

    text.replace("some", "much");

    ASSERT_THAT(text, SmallString());
}

TEST(SmallString, ReplaceWithShorterText)
{
    SmallString text("here is some text");

    text.replace("some", "any");

    ASSERT_THAT(text, SmallString("here is any text"));
}

TEST(SmallString, ReplaceWithShorterTextOnEmptyText)
{
    SmallString text;

    text.replace("some", "any");

    ASSERT_THAT(text, SmallString());
}

TEST(SmallString, ReplaceWithLongerText)
{
    SmallString text("here is some text");

    text.replace("some", "much more");

    ASSERT_THAT(text, SmallString("here is much more text"));
}

TEST(SmallString, ReplaceWithLongerTextOnEmptyText)
{
    SmallString text;

    text.replace("some", "much more");

    ASSERT_THAT(text, SmallString());
}

TEST(SmallString, ReplaceShortSmallStringWithLongerText)
{
    SmallString text = SmallString::fromUtf8("here is some text");

    text.replace("some", "much more");

    ASSERT_THAT(text, SmallString("here is much more text"));
}

TEST(SmallString, ReplaceLongSmallStringWithLongerText)
{
    SmallString text = SmallString::fromUtf8("some very very very very very very very very very very very long string");

    text.replace("some", "much more");

    ASSERT_THAT(text, Eq(SmallString("much more very very very very very very very very very very very long string")));
}

TEST(SmallString, MultipleReplaceSmallStringWithLongerText)
{
    SmallString text = SmallString("here is some text with some longer text");

    text.replace("some", "much more");

    ASSERT_THAT(text, SmallString("here is much more text with much more longer text"));
}

TEST(SmallString, MultipleReplaceSmallStringWithShorterText)
{
    SmallString text = SmallString("here is some text with some longer text");

    text.replace("some", "a");

    ASSERT_THAT(text, SmallString("here is a text with a longer text"));
}

TEST(SmallString, DontReplaceReplacedText)
{
    SmallString text("here is some foo text");

    text.replace("foo", "foofoo");

    ASSERT_THAT(text, SmallString("here is some foofoo text"));
}


TEST(SmallString, StartsWith)
{
    SmallString text("$column");

    ASSERT_TRUE(text.startsWith("$column"));
    ASSERT_TRUE(text.startsWith("$col"));
    ASSERT_FALSE(text.startsWith("col"));
    ASSERT_TRUE(text.startsWith('$'));
    ASSERT_FALSE(text.startsWith('@'));
}

TEST(SmallString, EndsWith)
{
    SmallString text("/my/path");

    ASSERT_TRUE(text.endsWith("/my/path"));
    ASSERT_TRUE(text.endsWith("path"));
    ASSERT_FALSE(text.endsWith("paths"));
    ASSERT_TRUE(text.endsWith('h'));
    ASSERT_FALSE(text.endsWith('x'));
}

TEST(SmallString, EndsWithSmallString)
{
    SmallString text("/my/path");

    ASSERT_TRUE(text.endsWith(SmallString("path")));
    ASSERT_TRUE(text.endsWith('h'));
}

TEST(SmallString, ReserveSmallerThanReference)
{
    SmallString text("text");

    text.reserve(2);

    ASSERT_THAT(text.capacity(), 30);
}

TEST(SmallString, ReserveBiggerThanReference)
{
    SmallString text("text");

    text.reserve(10);

    ASSERT_THAT(text.capacity(), 30);
}

TEST(SmallString, ReserveMuchBiggerThanReference)
{
    SmallString text("text");

    text.reserve(100);

    ASSERT_THAT(text.capacity(), 100);
}

TEST(SmallString, ReserveSmallerThanShortSmallString)
{
    SmallString text = SmallString::fromUtf8("text");

    text.reserve(10);

    ASSERT_THAT(text.capacity(), 30);
}

TEST(SmallString, ReserveBiggerThanShortSmallString)
{
    SmallString text = SmallString::fromUtf8("text");

    text.reserve(100);

    ASSERT_THAT(text.capacity(), 100);
}

TEST(SmallString, ReserveBiggerThanLongSmallString)
{
    SmallString text = SmallString::fromUtf8("some very very very very very very very very very very very long string");

    text.reserve(100);

    ASSERT_THAT(text.capacity(), 100);
}

TEST(SmallString, OptimalHeapCacheLineForSize)
{
    ASSERT_THAT(SmallString::optimalHeapCapacity(64), 64);
    ASSERT_THAT(SmallString::optimalHeapCapacity(65), 128);
    ASSERT_THAT(SmallString::optimalHeapCapacity(127), 128);
    ASSERT_THAT(SmallString::optimalHeapCapacity(128), 128);
    ASSERT_THAT(SmallString::optimalHeapCapacity(129), 192);
    ASSERT_THAT(SmallString::optimalHeapCapacity(191), 192);
    ASSERT_THAT(SmallString::optimalHeapCapacity(193), 256);
    ASSERT_THAT(SmallString::optimalHeapCapacity(255), 256);
    ASSERT_THAT(SmallString::optimalHeapCapacity(257), 384);
    ASSERT_THAT(SmallString::optimalHeapCapacity(257), 384);
    ASSERT_THAT(SmallString::optimalHeapCapacity(383), 384);
    ASSERT_THAT(SmallString::optimalHeapCapacity(385), 512);
    ASSERT_THAT(SmallString::optimalHeapCapacity(4095), 4096);
    ASSERT_THAT(SmallString::optimalHeapCapacity(4096), 4096);
    ASSERT_THAT(SmallString::optimalHeapCapacity(4097), 6144);
}

TEST(SmallString, OptimalCapacityForSize)
{
    SmallString text;

    ASSERT_THAT(text.optimalCapacity(0), 0);
    ASSERT_THAT(text.optimalCapacity(30), 30);
    ASSERT_THAT(text.optimalCapacity(31), 63);
    ASSERT_THAT(text.optimalCapacity(63), 63);
    ASSERT_THAT(text.optimalCapacity(64), 127);
    ASSERT_THAT(text.optimalCapacity(128), 191);
}

TEST(SmallString, DataStreamData)
{
    SmallString inputText("foo");
    QByteArray byteArray;
    QDataStream out(&byteArray, QIODevice::ReadWrite);

    out << inputText;

    ASSERT_TRUE(byteArray.endsWith("foo"));
}

TEST(SmallString, ReadDataStreamSize)
{
    SmallString outputText("foo");
    QByteArray byteArray;
    quint32 size;
    {
        QDataStream out(&byteArray, QIODevice::WriteOnly);
        out << outputText;
    }
    QDataStream in(&byteArray, QIODevice::ReadOnly);

    in >> size;

    ASSERT_THAT(size, 3);
}

TEST(SmallString, ReadDataStreamData)
{
    SmallString outputText("foo");
    QByteArray byteArray;
    SmallString outputString;
    {
        QDataStream out(&byteArray, QIODevice::WriteOnly);
        out << outputText;
    }
    QDataStream in(&byteArray, QIODevice::ReadOnly);

    in >> outputString;

    ASSERT_THAT(outputString, SmallString("foo"));
}

TEST(SmallString, ShortSmallStringCopyConstuctor)
{
    SmallString text("text");

    auto copy = text;

    ASSERT_THAT(copy, text);
}

TEST(SmallString, LongSmallStringCopyConstuctor)
{
    SmallString text("this is a very very very very long text");

    auto copy = text;

    ASSERT_THAT(copy, text);
}

TEST(SmallString, ShortSmallStringMoveConstuctor)
{
    SmallString text("text");

    auto copy = std::move(text);

    ASSERT_TRUE(text.isEmpty());
    ASSERT_THAT(copy, SmallString("text"));
}

TEST(SmallString, LongSmallStringMoveConstuctor)
{
    SmallString text("this is a very very very very long text");

    auto copy = std::move(text);

    ASSERT_TRUE(text.isEmpty());
    ASSERT_THAT(copy, SmallString("this is a very very very very long text"));
}

TEST(SmallString, ShortSmallStringCopyAssignment)
{
    SmallString text("text");
    SmallString copy("more text");

    copy = text;

    ASSERT_THAT(copy, text);
}

TEST(SmallString, LongSmallStringCopyAssignment)
{
    SmallString text("this is a very very very very long text");
    SmallString copy("more text");

    copy = text;

    ASSERT_THAT(copy, text);
}

TEST(SmallString, LongSmallStringCopySelfAssignment)
{
    SmallString text("this is a very very very very long text");

    text = text;

    ASSERT_THAT(text, SmallString("this is a very very very very long text"));
}

TEST(SmallString, ShortSmallStringMoveAssignment)
{
    SmallString text("text");
    SmallString copy("more text");

    copy = std::move(text);

    ASSERT_THAT(text, SmallString("more text"));
    ASSERT_THAT(copy, SmallString("text"));
}

TEST(SmallString, LongSmallStringMoveAssignment)
{
    SmallString text("this is a very very very very long text");
    SmallString copy("more text");

    copy = std::move(text);

    ASSERT_THAT(text, SmallString("more text"));
    ASSERT_THAT(copy, SmallString("this is a very very very very long text"));
}

TEST(SmallString, ReplaceByPositionShorterWithLongerText)
{
    SmallString text("this is a very very very very long text");

    text.replace(8, 1, "some");

    ASSERT_THAT(text, SmallString("this is some very very very very long text"));
}

TEST(SmallString, ReplaceByPositionLongerWithShortText)
{
    SmallString text("this is some very very very very long text");

    text.replace(8, 4, "a");

    ASSERT_THAT(text, SmallString("this is a very very very very long text"));
}

TEST(SmallString, ReplaceByPositionEqualSizedTexts)
{
    SmallString text("this is very very very very very long text");

    text.replace(33, 4, "much");

    ASSERT_THAT(text, SmallString("this is very very very very very much text"));
}