Add a test that emits signals from C++ and checks them in QMLv5.6.25.6.2

This is again trying to reproduce the issue described in the bug report,
but it also passes for me. Still, it's good to have this tested in
more depth.

Change-Id: Ibaaefd7359d558c3b59af3d86a1260ab06caa598
Task-number: QTBUG-54074
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

1 files changed, 42 insertions, 1 deletions

diff --git a/tests/auto/qml/tst_webchannel.qml b/tests/auto/qml/tst_webchannel.qml
index 6cb24b0..dc4cf93 100644
--- a/tests/auto/qml/tst_webchannel.qml
+++ b/tests/auto/qml/tst_webchannel.qml
@@ -94,10 +94,15 @@ TestCase {
         }
     }
 
+    TestObject {
+        id: testObject
+        WebChannel.id: "testObject"
+    }
+
     TestWebChannel {
         id: webChannel
         transports: [client.serverTransport]
-        registeredObjects: [myObj, myOtherObj, myFactory]
+        registeredObjects: [myObj, myOtherObj, myFactory, testObject]
     }
 
     function initChannel() {
@@ -412,4 +417,40 @@ TestCase {
         myObj.mySignal(0, myObj);
         compare(signalArg, 42);
     }
+
+    // see also: https://bugreports.qt.io/browse/QTBUG-54074
+    function test_signalArgumentTypeConversion()
+    {
+        var signalArgs = [];
+        function logSignalArgs(arg) {
+            signalArgs.push(arg);
+        }
+        var channel = client.createChannel(function(channel) {
+            var testObject = channel.objects.testObject;
+            testObject.testSignalBool.connect(logSignalArgs);
+            testObject.testSignalInt.connect(logSignalArgs);
+            testObject.triggerSignals();
+        });
+        client.awaitInit();
+
+        var msg = client.awaitMessage();
+        compare(msg.type, JSClient.QWebChannelMessageTypes.connectToSignal);
+        compare(msg.object, "testObject");
+
+        msg = client.awaitMessage();
+        compare(msg.type, JSClient.QWebChannelMessageTypes.connectToSignal);
+        compare(msg.object, "testObject");
+
+        msg = client.awaitMessage();
+        compare(msg.type, JSClient.QWebChannelMessageTypes.invokeMethod);
+        client.awaitIdle();
+
+        compare(signalArgs, [
+            true,
+            false,
+            42,
+            1,
+            0
+        ]);
+    }
 }