1 files changed, 35 insertions, 0 deletions
diff --git a/tests/auto/qset/tst_qset.cpp b/tests/auto/qset/tst_qset.cpp
index 05bb24c..81da3de 100644
--- a/tests/auto/qset/tst_qset.cpp
+++ b/tests/auto/qset/tst_qset.cpp
@@ -74,6 +74,7 @@ private slots:
     void clear();
     void remove();
     void contains();
+    void containsSet();
     void begin();
     void end();
     void insert();
@@ -347,6 +348,40 @@ void tst_QSet::contains()
     }
 }
 
+void tst_QSet::containsSet()
+{
+    QSet<QString> set1;
+    QSet<QString> set2;
+
+    // empty set contains the empty set
+    QVERIFY(set1.contains(set2));
+
+    for (int i = 0; i < 500; ++i) {
+        set1.insert(QString::number(i));
+        set2.insert(QString::number(i));
+    }
+    QVERIFY(set1.contains(set2));
+
+    set2.remove(QString::number(19));
+    set2.remove(QString::number(82));
+    set2.remove(QString::number(7));
+    QVERIFY(set1.contains(set2));
+
+    set1.remove(QString::number(23));
+    QVERIFY(!set1.contains(set2));
+
+    // filled set contains the empty set as well
+    QSet<QString> set3;
+    QVERIFY(set1.contains(set3));
+
+    // the empty set doesn't contain a filled set
+    QVERIFY(!set3.contains(set1));
+
+    // verify const signature
+    const QSet<QString> set4;
+    QVERIFY(set3.contains(set4));
+}
+
 void tst_QSet::begin()
 {
     QSet<int> set1;