improve back and frontend testing

tests/node_tests/mask_morphology.py

@@ -27,3 +27,31 @@ def test_mask_morphology():
 
     dilated_disk, = node.process(mask, operation="dilate", radius=2, shape="disk")
     assert np.count_nonzero(dilated_disk) > orig_count
+
+
+def test_mask_morphology_with_field():
+    from backend.nodes.mask_morphology import MaskMorphology
+    from backend.execution_context import active_node, execution_callbacks
+    from tests.node_tests._shared import make_field
+
+    node = MaskMorphology()
+    mask = np.zeros((32, 32), dtype=np.uint8)
+    mask[10:22, 10:22] = 255
+    field = make_field(data=np.ones((32, 32)))
+
+    previews = []
+    with execution_callbacks(preview=lambda nid, d: previews.append(d)), active_node("test"):
+        dilated, = node.process(mask, operation="dilate", radius=1, shape="square", field=field)
+    assert dilated.dtype == np.uint8
+    assert len(previews) == 1
+
+
+def test_mask_morphology_unknown_operation():
+    from backend.nodes.mask_morphology import MaskMorphology
+    node = MaskMorphology()
+    mask = np.zeros((32, 32), dtype=np.uint8)
+    try:
+        node.process(mask, operation="invalid_op", radius=1, shape="square")
+        assert False, "Expected ValueError"
+    except ValueError:
+        pass