QmlJS: Add test for recursive declared items

Tweak the test to allow multiple messages per line.

Task-number: QTCREATORBUG-24615
Change-Id: I662ab4801794dc3e49f68667f634337a847bc503
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

tests/auto/qml/codemodel/check/SmurfNonRecursive.qml

@@ -0,0 +1,6 @@
+import QtQuick 2.0
+import QtQuickControls 2.0 as Controls
+
+Controls.SmurfNonRecursive {
+
+}

tests/auto/qml/codemodel/check/SmurfRecursive.qml

@@ -0,0 +1,5 @@
+import QtQuick 2.0
+
+SmurfRecursive {  // 129 1 14 // 303 1 14
+
+}

tests/auto/qml/codemodel/check/tst_check.cpp

@@ -153,12 +153,21 @@ void tst_Check::test()
     QList<Message> messages = checker();
     std::sort(messages.begin(), messages.end(), &offsetComparator);
 
+    /*
+     * expected message are marked inside the respective qml file on the line of their occurrence
+     * with a comment stating error number, start column, and end column with optional state to mark
+     * e.g. false positives
+     * if more than 1 message at a line is expected these can be specified by adding further
+     * line comments in the same line
+     */
     const QRegularExpression messagePattern(" (-?\\d+) (\\d+) (\\d+)\\s*(# false positive|# wrong warning.*)?");
 
     QList<Message> expectedMessages;
     QHash<int, QString> xfails;
     for (const SourceLocation &comment : doc->engine()->comments()) {
-        const QString text = doc->source().mid(comment.begin(), comment.end() - comment.begin());
+        const QString fullComment = doc->source().mid(comment.begin(), comment.end() - comment.begin());
+        const QStringList splittedComment = fullComment.split("//");
+        for (const QString &text : splittedComment) {
             const QRegularExpressionMatch match = messagePattern.match(text);
             if (!match.hasMatch())
                 continue;
@@ -178,6 +187,7 @@ void tst_Check::test()
             if (messagePattern.captureCount() == 4 && !match.captured(4).isEmpty())
                 xfails.insert(expectedMessages.size() - 1, match.captured(4));
         }
+    }
 
     for (int i = 0; i < messages.size(); ++i) {
         if (i >= expectedMessages.size())