1 files changed, 27 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp b/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
index 6e95577655..1d30ca3d03 100644
--- a/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
+++ b/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
@@ -180,6 +180,33 @@ void tst_QVarLengthArray::emplace()
         QCOMPARE(&r, &strings.back());
         QCOMPARE(strings.size(), 3);
         QCOMPARE(strings.back(), QString(42, u'y'));
+
+        // test growing from empty arrays
+        QVarLengthArray<QString> emptyArrDefaultPrealloc;
+        QCOMPARE(emptyArrDefaultPrealloc.size(), 0);
+        emptyArrDefaultPrealloc.emplace_back();
+        QCOMPARE(emptyArrDefaultPrealloc.size(), 1);
+        emptyArrDefaultPrealloc.resize(1024);
+        QCOMPARE(emptyArrDefaultPrealloc.size(), 1024);
+        emptyArrDefaultPrealloc.resize(0);
+        QCOMPARE(emptyArrDefaultPrealloc.size(), 0);
+        emptyArrDefaultPrealloc.squeeze();
+        QCOMPARE(emptyArrDefaultPrealloc.size(), 0);
+        emptyArrDefaultPrealloc.emplace_back();
+        QCOMPARE(emptyArrDefaultPrealloc.size(), 1);
+
+        QVarLengthArray<QString, 1> emptyArrSmallPrealloc;
+        QCOMPARE(emptyArrSmallPrealloc.size(), 0);
+        emptyArrSmallPrealloc.emplace_back();
+        QCOMPARE(emptyArrSmallPrealloc.size(), 1);
+        emptyArrSmallPrealloc.resize(1024);
+        QCOMPARE(emptyArrSmallPrealloc.size(), 1024);
+        emptyArrSmallPrealloc.resize(0);
+        QCOMPARE(emptyArrSmallPrealloc.size(), 0);
+        emptyArrSmallPrealloc.squeeze();
+        QCOMPARE(emptyArrSmallPrealloc.size(), 0);
+        emptyArrSmallPrealloc.emplace_back();
+        QCOMPARE(emptyArrSmallPrealloc.size(), 1);
     }
 }