added TestJupyter

tests/TestJupyter.py

@@ -0,0 +1,13 @@
+from tests import BaseTest
+
+import cadquery
+
+class TestJupyter(BaseTest):
+    def test_repr_html(self):
+        cube = cadquery.Workplane('XY').box(1, 1, 1)
+        shape = cube.val()
+        self.assertIsInstance(shape, cadquery.occ_impl.shapes.Solid)
+
+        # Test no exception on rendering to html
+        html = shape._repr_html_()
+        # TODO: verification improvement: test for valid html