QVarLengthArray: Unit-test that clear() preserves capacity

Change-Id: Ib2b798b93ce9a1b77bca09b2a8c27a568ebf8670
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp b/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
index 5d12cd9804..94d81e0a5a 100644
--- a/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
+++ b/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
@@ -54,6 +54,7 @@ private slots:
     void indexOf();
     void lastIndexOf();
     void contains();
+    void clear();
     void initializeListInt();
     void initializeListMovable();
     void initializeListComplex();
@@ -752,6 +753,21 @@ void tst_QVarLengthArray::contains()
     QVERIFY(myvec.contains(QLatin1String("I don't exist")));
 }
 
+void tst_QVarLengthArray::clear()
+{
+    QVarLengthArray<QString, 5> myvec;
+
+    for (int i = 0; i < 10; ++i)
+        myvec << "aaa";
+
+    QCOMPARE(myvec.size(), 10);
+    QVERIFY(myvec.capacity() >= myvec.size());
+    const int oldCapacity = myvec.capacity();
+    myvec.clear();
+    QCOMPARE(myvec.size(), 0);
+    QCOMPARE(myvec.capacity(), oldCapacity);
+}
+
 void tst_QVarLengthArray::initializeListInt()
 {
     initializeList<int>();