Don't clean logo images when applied to the project

tests/controller/test_project.py

@@ -397,6 +397,26 @@ def test_clean_pictures(async_run, project, controller):
     assert not os.path.exists(os.path.join(project.pictures_directory, "test2.png"))
 
 
+def test_clean_pictures_and_keep_supplier_logo(async_run, project, controller):
+    """
+    When a project is close old pictures should be removed
+    """
+    project.supplier = {
+        'logo': 'logo.png'
+    }
+
+    drawing = async_run(project.add_drawing())
+    drawing._svg = "test.png"
+    open(os.path.join(project.pictures_directory, "test.png"), "w+").close()
+    open(os.path.join(project.pictures_directory, "test2.png"), "w+").close()
+    open(os.path.join(project.pictures_directory, "logo.png"), "w+").close()
+
+    async_run(project.close())
+    assert os.path.exists(os.path.join(project.pictures_directory, "test.png"))
+    assert not os.path.exists(os.path.join(project.pictures_directory, "test2.png"))
+    assert os.path.exists(os.path.join(project.pictures_directory, "logo.png"))
+
+
 def test_delete(async_run, project, controller):
     assert os.path.exists(project.path)
     async_run(project.delete())