1 files changed, 31 insertions, 1 deletions
diff --git a/tests/auto/corelib/text/qstring/tst_qstring.cpp b/tests/auto/corelib/text/qstring/tst_qstring.cpp
index 8f53824050..696b8159ac 100644
--- a/tests/auto/corelib/text/qstring/tst_qstring.cpp
+++ b/tests/auto/corelib/text/qstring/tst_qstring.cpp
@@ -600,6 +600,7 @@ private slots:
     void isValidUtf16_data();
     void isValidUtf16();
     void unicodeStrings();
+    void vasprintfWithPrecision();
 };
 
 template <class T> const T &verifyZeroTermination(const T &t) { return t; }
@@ -1674,7 +1675,7 @@ void tst_QString::lastIndexOf()
     QCOMPARE(haystack.lastIndexOf(needle.toLatin1(), from, cs), expected);
     QCOMPARE(haystack.lastIndexOf(needle.toLatin1().data(), from, cs), expected);
 
-    if (from >= -1 && from < haystack.size() && needle.size() > 0) {
+    if (from >= -1 && from < haystack.size()) {
         // unfortunately, QString and QRegExp don't have the same out of bound semantics
         // I think QString is wrong -- See file log for contact information.
         {
@@ -7148,6 +7149,35 @@ void tst_QString::isValidUtf16()
     QTEST(string.isValidUtf16(), "valid");
 }
 
+static QString doVasprintf(const char *msg, ...) {
+    va_list args;
+    va_start(args, msg);
+    const QString result = QString::vasprintf(msg, args);
+    va_end(args);
+    return result;
+}
+
+void tst_QString::vasprintfWithPrecision()
+{
+    {
+        const char *msg = "Endpoint %.*s with";
+        static const char arg0[3] = { 'a', 'b', 'c' };
+        static const char arg1[4] = { 'a', 'b', 'c', '\0' };
+        QCOMPARE(doVasprintf(msg, 3, arg0), QStringLiteral("Endpoint abc with"));
+        QCOMPARE(doVasprintf(msg, 9, arg1), QStringLiteral("Endpoint abc with"));
+        QCOMPARE(doVasprintf(msg, 0, nullptr), QStringLiteral("Endpoint  with"));
+    }
+
+    {
+        const char *msg = "Endpoint %.*ls with";
+        static const ushort arg0[3] = { 'a', 'b', 'c' };
+        static const ushort arg1[4] = { 'a', 'b', 'c', '\0' };
+        QCOMPARE(doVasprintf(msg, 3, arg0), QStringLiteral("Endpoint abc with"));
+        QCOMPARE(doVasprintf(msg, 9, arg1), QStringLiteral("Endpoint abc with"));
+        QCOMPARE(doVasprintf(msg, 0, nullptr), QStringLiteral("Endpoint  with"));
+    }
+}
+
 QTEST_APPLESS_MAIN(tst_QString)
 
 #include "tst_qstring.moc"