tst_QHashFunctions: extend the consistency() test with mixed-signedness int types

Looking good, because all signed integral qHash overloads are implemented
by casting to the unsigned type before hashing.

Pick-to: 6.7 6.6 6.5
Change-Id: I8372eb6d4a57b40c2371db58d1b5aeabe9a3951a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp b/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp
index 39f9cdae81..6e3f4a793f 100644
--- a/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp
+++ b/tests/auto/corelib/tools/qhashfunctions/tst_qhashfunctions.cpp
@@ -104,6 +104,25 @@ void tst_QHashFunctions::consistent()
         QCOMPARE(h32, h64);
     }
 
+    // mixed signed/unsigned
+    {
+        const auto hu8 = qHash(quint8(42), seed);
+        const auto hs8 = qHash(qint8(42),  seed);
+        QCOMPARE(hu8, hs8);
+
+        const auto hu16 = qHash(quint16(4242), seed);
+        const auto hs16 = qHash(qint16(4242),  seed);
+        QCOMPARE(hu16, hs16);
+
+        const auto hu32 = qHash(quint32(4242'4242), seed);
+        const auto hs32 = qHash(qint32(4242'4242),  seed);
+        QCOMPARE(hu32, hs32);
+
+        const auto hu64 = qHash(quint64(4242'424242), seed);
+        const auto hs64 = qHash(qint64(4242'424242),  seed);
+        QCOMPARE(hu64, hs64);
+    }
+
     // floats
     {
         const/*expr broken: QTBUG-116079*/ qfloat16 f16 = qfloat16(-42.f);