tests: add initApplication() to avoid code duplications

tests/CMakeLists.txt

@@ -37,6 +37,10 @@ if(NOT BUILD_DYNAMIC_LINK_PYTHON)
     )
 endif()
 
+include_directories(
+    ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
 set(CMAKE_AUTOMOC ON)
 
 function(setup_qt_test)

tests/src/App/ComplexGeoData.cpp

@@ -8,6 +8,7 @@
 #include <App/Application.h>
 #include <App/ComplexGeoData.h>
 #include <Base/BoundBox.h>
+#include <src/App/InitApplication.h>
 
 
 class ConcreteComplexGeoDataForTesting: public Data::ComplexGeoData
@@ -72,12 +73,7 @@ class ComplexGeoDataTest: public ::testing::Test
 protected:
     static void SetUpTestSuite()
     {
-        if (App::Application::GetARGC() == 0) {
-            constexpr int argc = 1;
-            std::array<char*, argc> argv {"FreeCAD"};
-            App::Application::Config()["ExeName"] = "FreeCAD";
-            App::Application::init(argc, argv.data());
-        }
+        tests::initApplication();
     }
 
     void SetUp() override

tests/src/App/Document.cpp

@@ -7,6 +7,7 @@
 #include "App/Document.h"
 #include "App/StringHasher.h"
 #include "Base/Writer.h"
+#include <src/App/InitApplication.h>
 
 using ::testing::Eq;
 using ::testing::Ne;
@@ -28,12 +29,7 @@ class DocumentTest: public ::testing::Test
 protected:
     static void SetUpTestSuite()
     {
-        if (App::Application::GetARGC() == 0) {
-            constexpr int argc = 1;
-            std::array<char*, argc> argv {"FreeCAD"};
-            App::Application::Config()["ExeName"] = "FreeCAD";
-            App::Application::init(argc, const_cast<char**>(argv.data()));  // NOLINT
-        }
+        tests::initApplication();
     }
 
     void SetUp() override

tests/src/App/ElementMap.cpp

@@ -4,6 +4,7 @@
 
 #include <App/Application.h>
 #include <App/ElementMap.h>
+#include <src/App/InitApplication.h>
 
 // NOLINTBEGIN(readability-magic-numbers)
 
@@ -45,12 +46,7 @@ class ElementMapTest: public ::testing::Test
 protected:
     static void SetUpTestSuite()
     {
-        if (App::Application::GetARGC() == 0) {
-            int argc = 1;
-            char* argv[] = {"FreeCAD"};
-            App::Application::Config()["ExeName"] = "FreeCAD";
-            App::Application::init(argc, argv);
-        }
+        tests::initApplication();
     }
 
     void SetUp() override

tests/src/App/InitApplication.h

@@ -0,0 +1,21 @@
+#ifndef TEST_APPLICATION_H
+#define TEST_APPLICATION_H
+
+#include <App/Application.h>
+
+namespace tests
+{
+
+static void initApplication()
+{
+    if (App::Application::GetARGC() == 0) {
+        constexpr int argc = 1;
+        std::array<const char*, argc> argv {"FreeCAD"};
+        App::Application::Config()["ExeName"] = "FreeCAD";
+        App::Application::init(argc, const_cast<char**>(argv.data()));  // NOLINT
+    }
+}
+
+}  // namespace tests
+
+#endif  // TEST_APPLICATION_H

tests/src/Gui/QuantitySpinBox.cpp

@@ -6,6 +6,7 @@
 #include <App/Application.h>
 
 #include "Gui/QuantitySpinBox.h"
+#include <src/App/InitApplication.h>
 
 // NOLINTBEGIN(readability-magic-numbers)
 
@@ -16,12 +17,7 @@ class testQuantitySpinBox: public QObject
 public:
     testQuantitySpinBox()
     {
-        if (App::Application::GetARGC() == 0) {
-            constexpr int argc = 1;
-            std::array<char*, argc> argv {"FreeCAD"};
-            App::Application::Config()["ExeName"] = "FreeCAD";
-            App::Application::init(argc, argv.data());
-        }
+        tests::initApplication();
         qsb = std::make_unique<Gui::QuantitySpinBox>();
     }
 

tests/src/Mod/Material/App/Model.cpp

@@ -33,18 +33,14 @@
 #include <Mod/Material/App/MaterialManager.h>
 #include <Mod/Material/App/Model.h>
 #include <Mod/Material/App/ModelManager.h>
+#include <src/App/InitApplication.h>
 
 // clang-format off
 
 class MaterialTest : public ::testing::Test {
  protected:
   static void SetUpTestSuite() {
-    if (App::Application::GetARGC() == 0) {
-        constexpr int argc = 1;
-        std::array<char*, argc> argv {"FreeCAD"};
-        App::Application::Config()["ExeName"] = "FreeCAD";
-        App::Application::init(argc, argv.data());
-    }
+    tests::initApplication();
   }
 
   void SetUp() override {

tests/src/Mod/Sketcher/App/SketchObject.cpp

@@ -10,18 +10,14 @@
 #include <App/ObjectIdentifier.h>
 #include <Mod/Sketcher/App/GeoEnum.h>
 #include <Mod/Sketcher/App/SketchObject.h>
+#include <src/App/InitApplication.h>
 
 class SketchObjectTest: public ::testing::Test
 {
 protected:
     static void SetUpTestSuite()
     {
-        if (App::Application::GetARGC() == 0) {
-            int argc = 1;
-            char* argv[] = {"FreeCAD"};
-            App::Application::Config()["ExeName"] = "FreeCAD";
-            App::Application::init(argc, argv);
-        }
+        tests::initApplication();
     }
 
     void SetUp() override