Draft: move the TestDraft unit tests to separate modules

This results in better organization of the tests,
avoiding extremely big files.

src/Mod/Draft/drafttests/test_oca.py

@@ -0,0 +1,90 @@
+"""Unit test for the Draft module, OCA import and export tests.
+"""
+# ***************************************************************************
+# *   (c) 2013 Yorik van Havre <yorik@uncreated.net>                        *
+# *   (c) 2019 Eliud Cabrera Castillo <e.cabrera-castillo@tum.de>           *
+# *                                                                         *
+# *   This file is part of the FreeCAD CAx development system.              *
+# *                                                                         *
+# *   This program is free software; you can redistribute it and/or modify  *
+# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
+# *   as published by the Free Software Foundation; either version 2 of     *
+# *   the License, or (at your option) any later version.                   *
+# *   for detail see the LICENCE text file.                                 *
+# *                                                                         *
+# *   FreeCAD is distributed in the hope that it will be useful,            *
+# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+# *   GNU Library General Public License for more details.                  *
+# *                                                                         *
+# *   You should have received a copy of the GNU Library General Public     *
+# *   License along with FreeCAD; if not, write to the Free Software        *
+# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+# *   USA                                                                   *
+# *                                                                         *
+# ***************************************************************************
+
+import os
+import unittest
+import FreeCAD as App
+import Draft
+from .auxiliary import _msg
+from .auxiliary import _draw_header
+from .auxiliary import _fake_function
+
+
+class DraftOCA(unittest.TestCase):
+    """Test reading and writing of OCA files with Draft."""
+
+    def setUp(self):
+        """Set up a new document to hold the tests.
+
+        This is executed before every test, so we create a document
+        to hold the objects.
+        """
+        _draw_header()
+        self.doc_name = self.__class__.__name__
+        if App.ActiveDocument:
+            if App.ActiveDocument.Name != self.doc_name:
+                App.newDocument(self.doc_name)
+        else:
+            App.newDocument(self.doc_name)
+        App.setActiveDocument(self.doc_name)
+        self.doc = App.ActiveDocument
+        _msg("  Temporary document '{}'".format(self.doc_name))
+
+    def test_read_oca(self):
+        """Read an OCA file and import its elements as Draft objects."""
+        operation = "importOCA.import"
+        _msg("  Test '{}'".format(operation))
+        _msg("  This test requires an OCA file to read.")
+
+        file = 'Mod/Draft/drafttest/test.oca'
+        in_file = os.path.join(App.getResourceDir(), file)
+        _msg("  file={}".format(in_file))
+        _msg("  exists={}".format(os.path.exists(in_file)))
+
+        Draft.import_OCA = _fake_function
+        obj = Draft.import_OCA(in_file)
+        self.assertTrue(obj, "'{}' failed".format(operation))
+
+    def test_export_oca(self):
+        """Create some figures and export them to an OCA file."""
+        operation = "importOCA.export"
+        _msg("  Test '{}'".format(operation))
+
+        file = 'Mod/Draft/drafttest/out_test.oca'
+        out_file = os.path.join(App.getResourceDir(), file)
+        _msg("  file={}".format(out_file))
+        _msg("  exists={}".format(os.path.exists(out_file)))
+
+        Draft.export_OCA = _fake_function
+        obj = Draft.export_OCA(out_file)
+        self.assertTrue(obj, "'{}' failed".format(operation))
+
+    def tearDown(self):
+        """Finish the test.
+
+        This is executed after each test, so we close the document.
+        """
+        App.closeDocument(self.doc_name)