ovis: add software-renderer based unit testing

modules/ovis/misc/python/test_ovis.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+import os
+import numpy as np
+import cv2 as cv
+
+from tests_common import NewOpenCVTests
+#from unittest import TestCase as NewOpenCVTests
+
+
+class ovis_contrib_test(NewOpenCVTests):
+
+    def setUp(self):
+        super().setUp()
+        # use software rendering
+        os.environ["OPENCV_OVIS_RENDERSYSTEM"] = "Tiny Rendering Subsystem"
+        # in case something goes wrong
+        os.environ["OPENCV_OVIS_VERBOSE_LOG"] = "1"
+
+    def test_multiWindow(self):
+        win0 = cv.ovis.createWindow("main", (1, 1))
+        win1 = cv.ovis.createWindow("other", (1, 1))
+        del win1
+        win1 = cv.ovis.createWindow("other", (1, 1))
+        del win1
+
+    def test_addResourceLocation(self):
+        win0 = cv.ovis.createWindow("main", (1, 1))
+        with self.assertRaises(cv.error):
+            # must be called before the first createWindow
+            cv.ovis.addResourceLocation(".")
+
+    def test_texStride(self):
+        win = cv.ovis.createWindow("main", (1, 1))
+        data = np.zeros((200, 200), dtype=np.uint8)
+        cv.ovis.createPlaneMesh("plane", (1, 1), data[50:-50, 50:-50])
+
+
+if __name__ == '__main__':
+    NewOpenCVTests.bootstrap()