Add a test for a crash in ModelManagerInterface

Task-number: QTCREATORBUG-25350
Change-Id: I4ea31e7936cc77dcd8f3fc494b5ecbd83858a766
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/extensionsystem/pluginmanager.cpp

@@ -1393,6 +1393,12 @@ void PluginManagerPrivate::shutdown()
         shutdownEventLoop->exec();
     }
     deleteAll();
+#ifdef WITH_TESTS
+    if (PluginManager::isScenarioRunning("TestModelManagerInterface")) {
+        qDebug() << "Point 2: Expect the next call to Point 3 triggers a crash";
+        QThread::currentThread()->sleep(5);
+    }
+#endif
     if (!allObjects.isEmpty()) {
         qDebug() << "There are" << allObjects.size() << "objects left in the plugin manager pool.";
         // Intentionally split debug info here, since in case the list contains

src/libs/qmljs/qmljsmodelmanagerinterface.cpp

@@ -40,6 +40,10 @@
 #include <utils/runextensions.h>
 #include <utils/stringutils.h>
 
+#ifdef WITH_TESTS
+#include <extensionsystem/pluginmanager.h>
+#endif
+
 #include <QDir>
 #include <QDirIterator>
 #include <QFile>
@@ -969,6 +973,16 @@ void ModelManagerInterface::parseLoop(QSet<QString> &scannedPaths,
         doc->setSource(contents);
         doc->parse();
 
+#ifdef WITH_TESTS
+        if (ExtensionSystem::PluginManager::isScenarioRunning("TestModelManagerInterface")) {
+            ExtensionSystem::PluginManager::waitForScenarioFullyInitialized();
+            if (ExtensionSystem::PluginManager::finishScenario()) {
+                qDebug() << "Point 1: Shutdown triggered";
+                QThread::currentThread()->sleep(2);
+                qDebug() << "Point 3: If Point 2 was already reached, expect a crash now";
+            }
+        }
+#endif
         // update snapshot. requires synchronization, but significantly reduces amount of file
         // system queries for library imports because queries are cached in libraryInfo
         const Snapshot snapshot = modelManager->snapshot();

src/plugins/autotest/autotestplugin.cpp

@@ -280,6 +280,8 @@ bool AutotestPlugin::initialize(const QStringList &arguments, QString *errorStri
 #ifdef WITH_TESTS
     ExtensionSystem::PluginManager::registerScenario("TestStringTable",
                    [this]() { return dd->m_loadProjectScenario(); });
+    ExtensionSystem::PluginManager::registerScenario("TestModelManagerInterface",
+                   [this]() { return dd->m_loadProjectScenario(); });
 #endif
     return true;
 }

src/plugins/autotest/autotestunittests.cpp

@@ -308,13 +308,23 @@ void AutoTestUnitTests::testCodeParserBoostTest_data()
         << QString(m_tmpDir->path() + "/simple_boost/simple_boost.qbs") << QString(".qbs");
 }
 
-void AutoTestUnitTests::testStringTable()
+static int executeScenario(const QString &scenario)
 {
     const PluginManager::ProcessData data = PluginManager::creatorProcessData();
-    QStringList additionalArgs{ "-scenario", "TestStringTable" };
+    QStringList additionalArgs{ "-scenario", scenario };
     if (!data.m_args.contains("-settingspath") && !data.m_settingsPath.isEmpty())
         additionalArgs << "-settingspath" << data.m_settingsPath;
-    QCOMPARE(QProcess::execute(data.m_executable, data.m_args + additionalArgs), 0);
+    return QProcess::execute(data.m_executable, data.m_args + additionalArgs);
+}
+
+void AutoTestUnitTests::testStringTable()
+{
+    QCOMPARE(executeScenario("TestStringTable"), 0);
+}
+
+void AutoTestUnitTests::testModelManagerInterface()
+{
+    QCOMPARE(executeScenario("TestModelManagerInterface"), 0);
 }
 
 } // namespace Internal

src/plugins/autotest/autotestunittests.h

@@ -56,6 +56,7 @@ private slots:
     void testCodeParserBoostTest();
     void testCodeParserBoostTest_data();
     void testStringTable();
+    void testModelManagerInterface();
 
 private:
     TestTreeModel *m_model = nullptr;