QPair: add tests for conversion ctor/assignment operators

Change-Id: Id54ada05f477aa3262ad99d82bc243c3d17e06f0
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qpair/tst_qpair.cpp b/tests/auto/corelib/tools/qpair/tst_qpair.cpp
index 076efc5428..f7cb07125b 100644
--- a/tests/auto/corelib/tools/qpair/tst_qpair.cpp
+++ b/tests/auto/corelib/tools/qpair/tst_qpair.cpp
@@ -41,6 +41,7 @@ class tst_QPair : public QObject
     Q_OBJECT
 private Q_SLOTS:
     void testConstexpr();
+    void testConversions();
 };
 
 class C { char _[4]; };
@@ -108,5 +109,62 @@ void tst_QPair::testConstexpr()
     Q_UNUSED(pSI);
 }
 
+void tst_QPair::testConversions()
+{
+    // construction from lvalue:
+    {
+        const QPair<int, double> rhs(42, 4.5);
+        const QPair<int, int> pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        const QPair<int, float> pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+    }
+
+    // assignment from lvalue:
+    {
+        const QPair<int, double> rhs(42, 4.5);
+        QPair<int, int> pii;
+        pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        QPair<int, float> pif;
+        pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+    }
+
+    // construction from rvalue:
+    {
+#define rhs qMakePair(42, 4.5)
+        const QPair<int, int> pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        const QPair<int, float> pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+#undef rhs
+    }
+
+    // assignment from rvalue:
+    {
+#define rhs qMakePair(42, 4.5)
+        QPair<int, int> pii;
+        pii = rhs;
+        QCOMPARE(pii.first, 42);
+        QCOMPARE(pii.second, 4);
+
+        QPair<int, float> pif;
+        pif = rhs;
+        QCOMPARE(pif.first, 42);
+        QCOMPARE(pif.second, 4.5f);
+#undef rhs
+    }
+}
+
 QTEST_APPLESS_MAIN(tst_QPair)
 #include "tst_qpair.moc"