Test thread safety of proj context generation

nyalldawson · nyalldawson · commit d7abfb47ee29 · 2019-03-19T11:47:01.000+10:00
Sponsored by ICSM
diff --git a/tests/src/core/CMakeLists.txt b/tests/src/core/CMakeLists.txt
@@ -176,6 +176,7 @@ SET(TESTS
  testqgspoint.cpp
  testqgsproject.cpp
  testqgsprojectstorage.cpp
+ testqgsprojutils.cpp
  testqgsproperty.cpp
  testqgis.cpp
  testqgsrasterfilewriter.cpp
diff --git a/tests/src/core/testqgsprojutils.cpp b/tests/src/core/testqgsprojutils.cpp
@@ -0,0 +1,71 @@
+/***************************************************************************
+     testqgsprojutils.cpp
+     --------------------------------------
+    Date                 : March 2019
+    Copyright            : (C) 2019 Nyall Dawson
+    Email                : nyall dot dawson at gmail dot com
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include "qgstest.h"
+#include <QPixmap>
+
+#include "qgsapplication.h"
+#include "qgslogger.h"
+
+//header for class being tested
+#include "qgsprojutils.h"
+#include <QtConcurrent>
+
+class TestQgsProjUtils: public QObject
+{
+    Q_OBJECT
+  private slots:
+    void initTestCase();
+    void cleanupTestCase();
+    void threadSafeContext();
+
+};
+
+
+void TestQgsProjUtils::initTestCase()
+{
+  QgsApplication::init();
+  QgsApplication::createDatabase();
+  QgsApplication::initQgis();
+  QgsApplication::showSettings();
+}
+
+void TestQgsProjUtils::cleanupTestCase()
+{
+  QgsApplication::exitQgis();
+}
+
+
+struct ProjContextWrapper
+{
+  explicit ProjContextWrapper()
+  {}
+
+  void operator()( int )
+  {
+    QVERIFY( QgsProjContext::get() );
+    // TODO - do something with the context?
+  }
+};
+
+void TestQgsProjUtils::threadSafeContext()
+{
+  // smash proj context generation over many threads
+  QVector< int > list;
+  list.resize( 100 );
+  QtConcurrent::blockingMap( list, ProjContextWrapper() );
+}
+
+QGSTEST_MAIN( TestQgsProjUtils )
+#include "testqgsprojutils.moc"
