Add further numpy rendering test case

tests/helpers/test_renderer.py

@@ -169,6 +169,25 @@ def test_render_page_bgcolour(colour, sample_page):
     image.close()
 
 
+@pytest.mark.parametrize(
+    "rev_byteorder", [False, True]
+)
+def test_render_page_tonumpy(rev_byteorder, sample_page):
+
+    array, cl_format = sample_page.render_tonumpy(rev_byteorder=rev_byteorder)
+    assert isinstance(array, numpy.ndarray)
+    if rev_byteorder:
+        assert cl_format == "RGB"
+    else:
+        assert cl_format == "BGR"
+
+    for (x, y), value in ExpRenderPixels:
+        if rev_byteorder:
+            assert tuple(array[y][x]) == value
+        else:
+            assert tuple(array[y][x]) == tuple(reversed(value))
+
+
 @pytest.mark.parametrize(
     "rev_byteorder", [False, True]
 )