Add unit tests covering most of QVector's API.

Similarly to the QList tests, if this breaks, it'll be found out quickly -
but it is nice to have tests to pinpoint exactly what, and why.

Reviewed-by: Olivier Goffart
Merge-Request: 584

1 files changed, 600 insertions, 0 deletions

diff --git a/tests/auto/qvector/tst_qvector.cpp b/tests/auto/qvector/tst_qvector.cpp
index ebc19edd5d..2bc8d15c5e 100644
--- a/tests/auto/qvector/tst_qvector.cpp
+++ b/tests/auto/qvector/tst_qvector.cpp
@@ -55,10 +55,610 @@ public:
     virtual ~tst_QVector() {}
 
 private slots:
+    void constructors() const;
+    void append() const;
+    void at() const;
+    void capacity() const;
+    void clear() const;
+    void constData() const;
+    void contains() const;
+    void count() const;
+    void data() const;
+    void empty() const;
+    void endsWith() const;
+    void fill() const;
+    void first() const;
+    void fromList() const;
+    void fromStdVector() const;
+    void indexOf() const;
+    void insert() const;
+    void isEmpty() const;
+    void last() const;
+    void lastIndexOf() const;
+    void mid() const;
+    void prepend() const;
+    void remove() const;
+    void size() const;
+    void startsWith() const;
+    void toList() const;
+    void toStdVector() const;
+    void value() const;
+
+    void testOperators() const;
+
     void outOfMemory();
     void QTBUG6416_reserve();
 };
 
+void tst_QVector::constructors() const
+{
+    // pre-reserve capacity
+    {
+        QVector<int> myvec(5);
+
+        QVERIFY(myvec.capacity() == 5);
+    }
+
+    // default-initialise items
+    {
+        QVector<int> myvec(5, 42);
+
+        QVERIFY(myvec.capacity() == 5);
+
+        // make sure all items are initialised ok
+        foreach (int meaningoflife, myvec) {
+            QCOMPARE(meaningoflife, 42);
+        }
+    }
+}
+
+void tst_QVector::append() const
+{
+    QVector<int> myvec;
+    myvec.append(42);
+    myvec.append(43);
+    myvec.append(44);
+
+    QVERIFY(myvec.size() == 3);
+    QCOMPARE(myvec, QVector<int>() << 42 << 43 << 44);
+}
+
+void tst_QVector::at() const
+{
+    QVector<QString> myvec;
+    myvec << "foo" << "bar" << "baz";
+
+    QVERIFY(myvec.size() == 3);
+    QCOMPARE(myvec.at(0), QLatin1String("foo"));
+    QCOMPARE(myvec.at(1), QLatin1String("bar"));
+    QCOMPARE(myvec.at(2), QLatin1String("baz"));
+
+    // append an item
+    myvec << "hello";
+    QVERIFY(myvec.size() == 4);
+    QCOMPARE(myvec.at(0), QLatin1String("foo"));
+    QCOMPARE(myvec.at(1), QLatin1String("bar"));
+    QCOMPARE(myvec.at(2), QLatin1String("baz"));
+    QCOMPARE(myvec.at(3), QLatin1String("hello"));
+
+    // remove an item
+    myvec.remove(1);
+    QVERIFY(myvec.size() == 3);
+    QCOMPARE(myvec.at(0), QLatin1String("foo"));
+    QCOMPARE(myvec.at(1), QLatin1String("baz"));
+    QCOMPARE(myvec.at(2), QLatin1String("hello"));
+}
+
+void tst_QVector::capacity() const
+{
+    QVector<QString> myvec;
+
+    // TODO: is this guarenteed? seems a safe assumption, but I suppose preallocation of a
+    // few items isn't an entirely unforseeable possibility.
+    QVERIFY(myvec.capacity() == 0);
+
+    // test it gets a size
+    myvec << "aaa" << "bbb" << "ccc";
+    QVERIFY(myvec.capacity() >= 3);
+
+    // make sure it grows ok
+    myvec << "aaa" << "bbb" << "ccc";
+    QVERIFY(myvec.capacity() >= 6);
+
+    // let's try squeeze a bit
+    myvec.remove(3);
+    myvec.remove(3);
+    myvec.remove(3);
+    // TODO: is this a safe assumption? presumably it won't release memory until shrink(), but can we asser that is true?
+    QVERIFY(myvec.capacity() >= 6);
+    myvec.squeeze();
+    QVERIFY(myvec.capacity() >= 3);
+
+    myvec.remove(0);
+    myvec.remove(0);
+    myvec.remove(0);
+    // TODO: as above note
+    QVERIFY(myvec.capacity() >= 3);
+    myvec.squeeze();
+    QVERIFY(myvec.capacity() == 0);
+}
+
+void tst_QVector::clear() const
+{
+    QVector<QString> myvec;
+    myvec << "aaa" << "bbb" << "ccc";
+
+    QVERIFY(myvec.size() == 3);
+    myvec.clear();
+    QVERIFY(myvec.size() == 0);
+    QVERIFY(myvec.capacity() == 0);
+}
+
+void tst_QVector::constData() const
+{
+    int arr[] = { 42, 43, 44 };
+    QVector<int> myvec;
+    myvec << 42 << 43 << 44;
+
+    QVERIFY(memcmp(myvec.constData(), reinterpret_cast<const int *>(&arr), sizeof(int) * 3) == 0);
+}
+
+void tst_QVector::contains() const
+{
+    QVector<QString> myvec;
+    myvec << "aaa" << "bbb" << "ccc";
+
+    QVERIFY(myvec.contains(QLatin1String("aaa")));
+    QVERIFY(myvec.contains(QLatin1String("bbb")));
+    QVERIFY(myvec.contains(QLatin1String("ccc")));
+    QVERIFY(!myvec.contains(QLatin1String("I don't exist")));
+
+    // add it and make sure it does :)
+    myvec.append(QLatin1String("I don't exist"));
+    QVERIFY(myvec.contains(QLatin1String("I don't exist")));
+}
+
+void tst_QVector::count() const
+{
+    // total size
+    {
+        // zero size
+        QVector<int> myvec;
+        QVERIFY(myvec.count() == 0);
+
+        // grow
+        myvec.append(42);
+        QVERIFY(myvec.count() == 1);
+        myvec.append(42);
+        QVERIFY(myvec.count() == 2);
+
+        // shrink
+        myvec.remove(0);
+        QVERIFY(myvec.count() == 1);
+        myvec.remove(0);
+        QVERIFY(myvec.count() == 0);
+    }
+
+    // count of items
+    {
+        QVector<QString> myvec;
+        myvec << "aaa" << "bbb" << "ccc";
+
+        // initial tests
+        QVERIFY(myvec.count(QLatin1String("aaa")) == 1);
+        QVERIFY(myvec.count(QLatin1String("pirates")) == 0);
+
+        // grow
+        myvec.append(QLatin1String("aaa"));
+        QVERIFY(myvec.count(QLatin1String("aaa")) == 2);
+
+        // shrink
+        myvec.remove(0);
+        QVERIFY(myvec.count(QLatin1String("aaa")) == 1);
+    }
+}
+
+void tst_QVector::data() const
+{
+    QVector<int> myvec;
+    myvec << 42 << 43 << 44;
+
+    // make sure it starts off ok
+    QCOMPARE(*(myvec.data() + 1), 43);
+
+    // alter it
+    *(myvec.data() + 1) = 69;
+
+    // check it altered
+    QCOMPARE(*(myvec.data() + 1), 69);
+
+    int arr[] = { 42, 69, 44 };
+    QVERIFY(memcmp(myvec.data(), reinterpret_cast<int *>(&arr), sizeof(int) * 3) == 0);
+}
+
+void tst_QVector::empty() const
+{
+    QVector<int> myvec;
+
+    // starts empty
+    QVERIFY(myvec.empty());
+
+    // not empty
+    myvec.append(1);
+    QVERIFY(!myvec.empty());
+
+    // empty again
+    myvec.remove(0);
+    QVERIFY(myvec.empty());
+}
+
+void tst_QVector::endsWith() const
+{
+    QVector<int> myvec;
+
+    // empty vector
+    QVERIFY(!myvec.endsWith(1));
+
+    // add the one, should work
+    myvec.append(1);
+    QVERIFY(myvec.endsWith(1));
+
+    // add something else, fails now
+    myvec.append(3);
+    QVERIFY(!myvec.endsWith(1));
+
+    // remove it again :)
+    myvec.remove(1);
+    QVERIFY(myvec.endsWith(1));
+}
+
+void tst_QVector::fill() const
+{
+    QVector<int> myvec;
+
+    // resize
+    myvec.resize(5);
+    myvec.fill(69);
+    QCOMPARE(myvec, QVector<int>() << 69 << 69 << 69 << 69 << 69);
+
+    // make sure it can resize itself too
+    myvec.fill(42, 10);
+    QCOMPARE(myvec, QVector<int>() << 42 << 42 << 42 << 42 << 42 << 42 << 42 << 42 << 42 << 42);
+}
+
+void tst_QVector::first() const
+{
+    QVector<int> myvec;
+    myvec << 69 << 42 << 3;
+
+    // test it starts ok
+    QCOMPARE(myvec.first(), 69);
+
+    // test removal changes
+    myvec.remove(0);
+    QCOMPARE(myvec.first(), 42);
+
+    // test prepend changes
+    myvec.prepend(23);
+    QCOMPARE(myvec.first(), 23);
+}
+
+void tst_QVector::fromList() const
+{
+    QList<QString> list;
+    list << "aaa" << "bbb" << "ninjas" << "pirates";
+
+    QVector<QString> myvec;
+    myvec = QVector<QString>::fromList(list);
+
+    // test it worked ok
+    QCOMPARE(myvec, QVector<QString>() << "aaa" << "bbb" << "ninjas" << "pirates");
+    QCOMPARE(list, QList<QString>() << "aaa" << "bbb" << "ninjas" << "pirates");
+}
+
+void tst_QVector::fromStdVector() const
+{
+    // stl = :(
+    std::vector<QString> svec;
+    svec.push_back(QLatin1String("aaa"));
+    svec.push_back(QLatin1String("bbb"));
+    svec.push_back(QLatin1String("ninjas"));
+    svec.push_back(QLatin1String("pirates"));
+    QVector<QString> myvec = QVector<QString>::fromStdVector(svec);
+
+    // test it converts ok
+    QCOMPARE(myvec, QVector<QString>() << "aaa" << "bbb" << "ninjas" << "pirates");
+}
+
+void tst_QVector::indexOf() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C" << "B" << "A";
+
+    QVERIFY(myvec.indexOf("B") == 1);
+    QVERIFY(myvec.indexOf("B", 1) == 1);
+    QVERIFY(myvec.indexOf("B", 2) == 3);
+    QVERIFY(myvec.indexOf("X") == -1);
+    QVERIFY(myvec.indexOf("X", 2) == -1);
+
+    // add an X
+    myvec << "X";
+    QVERIFY(myvec.indexOf("X") == 5);
+    QVERIFY(myvec.indexOf("X", 5) == 5);
+    QVERIFY(myvec.indexOf("X", 6) == -1);
+
+    // remove first A
+    myvec.remove(0);
+    QVERIFY(myvec.indexOf("A") == 3);
+    QVERIFY(myvec.indexOf("A", 3) == 3);
+    QVERIFY(myvec.indexOf("A", 4) == -1);
+}
+
+void tst_QVector::insert() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    // first position
+    QCOMPARE(myvec.at(0), QLatin1String("A"));
+    myvec.insert(0, QLatin1String("X"));
+    QCOMPARE(myvec.at(0), QLatin1String("X"));
+    QCOMPARE(myvec.at(1), QLatin1String("A"));
+
+    // middle
+    myvec.insert(1, QLatin1String("Z"));
+    QCOMPARE(myvec.at(0), QLatin1String("X"));
+    QCOMPARE(myvec.at(1), QLatin1String("Z"));
+    QCOMPARE(myvec.at(2), QLatin1String("A"));
+
+    // end
+    myvec.insert(5, QLatin1String("T"));
+    QCOMPARE(myvec.at(5), QLatin1String("T"));
+    QCOMPARE(myvec.at(4), QLatin1String("C"));
+
+    // insert a lot of garbage in the middle
+    myvec.insert(2, 2, QLatin1String("infinity"));
+    QCOMPARE(myvec, QVector<QString>() << "X" << "Z" << "infinity" << "infinity"
+             << "A" << "B" << "C" << "T");
+}
+
+void tst_QVector::isEmpty() const
+{
+    QVector<QString> myvec;
+
+    // starts ok
+    QVERIFY(myvec.isEmpty());
+
+    // not empty now
+    myvec.append(QLatin1String("hello there"));
+    QVERIFY(!myvec.isEmpty());
+
+    // empty again
+    myvec.remove(0);
+    QVERIFY(myvec.isEmpty());
+}
+
+void tst_QVector::last() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    // test starts ok
+    QCOMPARE(myvec.last(), QLatin1String("C"));
+
+    // test it changes ok
+    myvec.append(QLatin1String("X"));
+    QCOMPARE(myvec.last(), QLatin1String("X"));
+
+    // and remove again
+    myvec.remove(3);
+    QCOMPARE(myvec.last(), QLatin1String("C"));
+}
+
+void tst_QVector::lastIndexOf() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C" << "B" << "A";
+
+    QVERIFY(myvec.lastIndexOf("B") == 3);
+    QVERIFY(myvec.lastIndexOf("B", 2) == 1);
+    QVERIFY(myvec.lastIndexOf("X") == -1);
+    QVERIFY(myvec.lastIndexOf("X", 2) == -1);
+
+    // add an X
+    myvec << "X";
+    QVERIFY(myvec.lastIndexOf("X") == 5);
+    QVERIFY(myvec.lastIndexOf("X", 5) == 5);
+    QVERIFY(myvec.lastIndexOf("X", 3) == -1);
+
+    // remove first A
+    myvec.remove(0);
+    QVERIFY(myvec.lastIndexOf("A") == 3);
+    QVERIFY(myvec.lastIndexOf("A", 3) == 3);
+    QVERIFY(myvec.lastIndexOf("A", 2) == -1);
+}
+
+void tst_QVector::mid() const
+{
+    QVector<QString> list;
+    list << "foo" << "bar" << "baz" << "bak" << "buck" << "hello" << "kitty";
+
+    QCOMPARE(list.mid(3, 3), QVector<QString>() << "bak" << "buck" << "hello");
+    QCOMPARE(list.mid(4), QVector<QString>() << "buck" << "hello" << "kitty");
+}
+
+void tst_QVector::prepend() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    // starts ok
+    QVERIFY(myvec.size() == 3);
+    QCOMPARE(myvec.at(0), QLatin1String("A"));
+
+    // add something
+    myvec.prepend(QLatin1String("X"));
+    QCOMPARE(myvec.at(0), QLatin1String("X"));
+    QCOMPARE(myvec.at(1), QLatin1String("A"));
+    QVERIFY(myvec.size() == 4);
+
+    // something else
+    myvec.prepend(QLatin1String("Z"));
+    QCOMPARE(myvec.at(0), QLatin1String("Z"));
+    QCOMPARE(myvec.at(1), QLatin1String("X"));
+    QCOMPARE(myvec.at(2), QLatin1String("A"));
+    QVERIFY(myvec.size() == 5);
+
+    // clear and append to an empty vector
+    myvec.clear();
+    QVERIFY(myvec.size() == 0);
+    myvec.prepend(QLatin1String("ninjas"));
+    QVERIFY(myvec.size() == 1);
+    QCOMPARE(myvec.at(0), QLatin1String("ninjas"));
+}
+
+void tst_QVector::remove() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    // remove middle
+    myvec.remove(1);
+    QCOMPARE(myvec, QVector<QString>() << "A" << "C");
+
+    // remove rest
+    myvec.remove(0, 2);
+    QCOMPARE(myvec, QVector<QString>());
+}
+
+// ::reserve() is really hard to think of tests for, so not doing it.
+// ::resize() is tested in ::capacity().
+
+void tst_QVector::size() const
+{
+    // total size
+    {
+        // zero size
+        QVector<int> myvec;
+        QVERIFY(myvec.size() == 0);
+
+        // grow
+        myvec.append(42);
+        QVERIFY(myvec.size() == 1);
+        myvec.append(42);
+        QVERIFY(myvec.size() == 2);
+
+        // shrink
+        myvec.remove(0);
+        QVERIFY(myvec.size() == 1);
+        myvec.remove(0);
+        QVERIFY(myvec.size() == 0);
+    }
+}
+
+// ::squeeze() is tested in ::capacity().
+
+void tst_QVector::startsWith() const
+{
+    QVector<int> myvec;
+
+    // empty vector
+    QVERIFY(!myvec.startsWith(1));
+
+    // add the one, should work
+    myvec.prepend(1);
+    QVERIFY(myvec.startsWith(1));
+
+    // add something else, fails now
+    myvec.prepend(3);
+    QVERIFY(!myvec.startsWith(1));
+
+    // remove it again :)
+    myvec.remove(0);
+    QVERIFY(myvec.startsWith(1));
+}
+
+void tst_QVector::toList() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    // make sure it converts and doesn't modify the original vector
+    QCOMPARE(myvec.toList(), QList<QString>() << "A" << "B" << "C");
+    QCOMPARE(myvec, QVector<QString>() << "A" << "B" << "C");
+}
+
+void tst_QVector::toStdVector() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    std::vector<QString> svec = myvec.toStdVector();
+    QCOMPARE(svec.at(0), QLatin1String("A"));
+    QCOMPARE(svec.at(1), QLatin1String("B"));
+    QCOMPARE(svec.at(2), QLatin1String("C"));
+
+    QCOMPARE(myvec, QVector<QString>() << "A" << "B" << "C");
+}
+
+void tst_QVector::value() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+
+    // valid calls
+    QCOMPARE(myvec.value(0), QLatin1String("A"));
+    QCOMPARE(myvec.value(1), QLatin1String("B"));
+    QCOMPARE(myvec.value(2), QLatin1String("C"));
+
+    // default calls
+    QCOMPARE(myvec.value(-1), QString());
+    QCOMPARE(myvec.value(3), QString());
+
+    // test calls with a provided default, valid calls
+    QCOMPARE(myvec.value(0, QLatin1String("default")), QLatin1String("A"));
+    QCOMPARE(myvec.value(1, QLatin1String("default")), QLatin1String("B"));
+    QCOMPARE(myvec.value(2, QLatin1String("default")), QLatin1String("C"));
+
+    // test calls with a provided default that will return the default
+    QCOMPARE(myvec.value(-1, QLatin1String("default")), QLatin1String("default"));
+    QCOMPARE(myvec.value(3, QLatin1String("default")), QLatin1String("default"));
+}
+
+void tst_QVector::testOperators() const
+{
+    QVector<QString> myvec;
+    myvec << "A" << "B" << "C";
+    QVector<QString> myvectwo;
+    myvectwo << "D" << "E" << "F";
+    QVector<QString> combined;
+    combined << "A" << "B" << "C" << "D" << "E" << "F";
+
+    // !=
+    QVERIFY(myvec != myvectwo);
+
+    // +
+    QCOMPARE(myvec + myvectwo, combined);
+    QCOMPARE(myvec, QVector<QString>() << "A" << "B" << "C");
+    QCOMPARE(myvectwo, QVector<QString>() << "D" << "E" << "F");
+
+    // +=
+    myvec += myvectwo;
+    QCOMPARE(myvec, combined);
+
+    // ==
+    QVERIFY(myvec == combined);
+
+    // []
+    QCOMPARE(myvec[0], QLatin1String("A"));
+    QCOMPARE(myvec[1], QLatin1String("B"));
+    QCOMPARE(myvec[2], QLatin1String("C"));
+    QCOMPARE(myvec[3], QLatin1String("D"));
+    QCOMPARE(myvec[4], QLatin1String("E"));
+    QCOMPARE(myvec[5], QLatin1String("F"));
+}
+
+
 int fooCtor;
 int fooDtor;