split node tests into standalone files

tests/node_tests/test_mask_morphology.py

@@ -0,0 +1,29 @@
+import numpy as np
+
+
+def test_mask_morphology():
+    from backend.nodes.mask_morphology import MaskMorphology
+    node = MaskMorphology()
+
+    mask = np.zeros((64, 64), dtype=np.uint8)
+    mask[28:36, 28:36] = 255
+    orig_count = np.count_nonzero(mask)
+
+    dilated, = node.process(mask, operation="dilate", radius=1, shape="square")
+    assert dilated.dtype == np.uint8
+    assert np.count_nonzero(dilated) > orig_count
+
+    eroded, = node.process(mask, operation="erode", radius=1, shape="square")
+    assert np.count_nonzero(eroded) < orig_count
+
+    opened, = node.process(mask, operation="open", radius=1, shape="square")
+    assert np.count_nonzero(opened) <= orig_count
+
+    mask_hole = mask.copy()
+    mask_hole[32, 32] = 0
+    assert np.count_nonzero(mask_hole) == orig_count - 1
+    closed, = node.process(mask_hole, operation="close", radius=1, shape="square")
+    assert closed[32, 32] == 255
+
+    dilated_disk, = node.process(mask, operation="dilate", radius=2, shape="disk")
+    assert np.count_nonzero(dilated_disk) > orig_count