1 files changed, 43 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qstringview/tst_qstringview.cpp b/tests/auto/corelib/tools/qstringview/tst_qstringview.cpp
index e800a0d794..794f39708a 100644
--- a/tests/auto/corelib/tools/qstringview/tst_qstringview.cpp
+++ b/tests/auto/corelib/tools/qstringview/tst_qstringview.cpp
@@ -134,6 +134,8 @@ private Q_SLOTS:
     void literals() const;
     void at() const;
 
+    void arg() const;
+
     void fromQString() const;
     void fromQStringRef() const;
 
@@ -425,6 +427,47 @@ void tst_QStringView::at() const
     QCOMPARE(sv.at(4), QChar('o')); QCOMPARE(sv[4], QChar('o'));
 }
 
+void tst_QStringView::arg() const
+{
+#define CHECK1(pattern, arg1, expected) \
+    do { \
+        auto p = QStringViewLiteral(pattern); \
+        QCOMPARE(p.arg(QLatin1String(arg1)), expected); \
+        QCOMPARE(p.arg(QStringViewLiteral(arg1)), expected); \
+        QCOMPARE(p.arg(QStringLiteral(arg1)), expected); \
+        QCOMPARE(p.arg(QString(QLatin1String(arg1))), expected); \
+    } while (false) \
+    /*end*/
+#define CHECK2(pattern, arg1, arg2, expected) \
+    do { \
+        auto p = QStringViewLiteral(pattern); \
+        QCOMPARE(p.arg(QLatin1String(arg1), QLatin1String(arg2)), expected); \
+        QCOMPARE(p.arg(QStringViewLiteral(arg1), QLatin1String(arg2)), expected); \
+        QCOMPARE(p.arg(QLatin1String(arg1), QStringViewLiteral(arg2)), expected); \
+        QCOMPARE(p.arg(QStringViewLiteral(arg1), QStringViewLiteral(arg2)), expected); \
+    } while (false) \
+    /*end*/
+
+    CHECK1("", "World", "");
+    CHECK1("%1", "World", "World");
+    CHECK1("!%1?", "World", "!World?");
+    CHECK1("%1%1", "World", "WorldWorld");
+    CHECK1("%1%2", "World", "World%2");
+    CHECK1("%2%1", "World", "%2World");
+
+    CHECK2("", "Hello", "World", "");
+    CHECK2("%1", "Hello", "World", "Hello");
+    CHECK2("!%1, %2?", "Hello", "World", "!Hello, World?");
+    CHECK2("%1%1", "Hello", "World", "HelloHello");
+    CHECK2("%1%2", "Hello", "World", "HelloWorld");
+    CHECK2("%2%1", "Hello", "World", "WorldHello");
+
+#undef CHECK2
+#undef CHECK1
+
+    QCOMPARE(QStringViewLiteral(" %2 %2 %1 %3 ").arg(QLatin1Char('c'), QChar::CarriageReturn, u'C'), " \r \r c C ");
+}
+
 void tst_QStringView::fromQString() const
 {
     QString null;