QStringRef: add chop()

chop() was missing in the API.

Change-Id: I15af86c8f218cf159b8ce19bbeb2ffa6201f98cf
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qstringref/tst_qstringref.cpp b/tests/auto/corelib/tools/qstringref/tst_qstringref.cpp
index 25b97ceaa8..d2374fe0ae 100644
--- a/tests/auto/corelib/tools/qstringref/tst_qstringref.cpp
+++ b/tests/auto/corelib/tools/qstringref/tst_qstringref.cpp
@@ -81,6 +81,7 @@ private slots:
     void integer_conversion();
     void trimmed();
     void truncate();
+    void chop();
     void left();
     void right();
     void mid();
@@ -1904,6 +1905,48 @@ void tst_QStringRef::truncate()
     }
 }
 
+void tst_QStringRef::chop()
+{
+    const QString originalString = QStringLiteral("OriginalString~");
+    const QStringRef cref(&originalString);
+    {
+        const int n = 1;
+        QStringRef ref = cref;
+        QString str = originalString;
+        ref.chop(n);
+        str.chop(n);
+        QCOMPARE(ref.toString(), QLatin1String("OriginalString"));
+        QCOMPARE(ref.toString(), str);
+    }
+    {
+        const int n = -1;
+        QStringRef ref = cref;
+        QString str = originalString;
+        ref.chop(n);
+        str.chop(n);
+        QCOMPARE(ref.toString(), originalString);
+        QCOMPARE(ref.toString(), str);
+    }
+    {
+        const int n = 0;
+        QStringRef ref = cref;
+        QString str = originalString;
+        ref.chop(n);
+        str.chop(n);
+        QCOMPARE(ref.toString(), originalString);
+        QCOMPARE(ref.toString(), str);
+    }
+    {
+        const int n = 1000;
+        QStringRef ref = cref;
+        QString str = originalString;
+        ref.chop(n);
+        str.chop(n);
+        QCOMPARE(ref.toString(), str);
+        QVERIFY(ref.isEmpty());
+    }
+}
+
 void tst_QStringRef::left()
 {
     QString originalString = "OrginalString~";