add unit tests for MergedEdge

Author: Stevengre

pyk/src/pyk/kcfg/show.py

@@ -138,8 +138,8 @@ def _print_edge(edge: KCFG.Edge) -> list[str]:
         def _print_merged_edge(merged_edge: KCFG.MergedEdge) -> list[str]:
             res = '('
             for edge in merged_edge.edges:
-                res += f'{edge.depth}| '
-            res = res[:-2] + ' steps)'
+                res += f'{edge.depth}|'
+            res = res[:-1] + ' steps)'
             return [res] if len(res) < 78 else ['(merged edge)']
 
         def _print_cover(cover: KCFG.Cover) -> Iterable[str]:

pyk/src/tests/unit/test_kcfg.py

@@ -77,6 +77,10 @@ def edge(i: int, j: int) -> KCFG.Edge:
     return KCFG.Edge(node(i), node(j), 1, ())
 
 
+def merged_edge(i: int, j: int, edges: Iterable[KCFG.Edge]) -> KCFG.MergedEdge:
+    return KCFG.MergedEdge(node(i), node(j), tuple(edges))
+
+
 def cover(i: int, j: int) -> KCFG.Cover:
     csubst = term(j).match_with_constraint(term(i))
     assert csubst is not None
@@ -107,6 +111,14 @@ def _make_edge_dict(i: int, j: int, depth: int = 1, rules: tuple[str, ...] = ())
     return [_make_edge_dict(*edge) for edge in edges]
 
 
+def merged_edge_dicts(*merged_edges: Iterable) -> list[dict[str, Any]]:
+
+    def _make_merged_edge_dict(s: int, t: int, *edges: Iterable) -> dict[str, Any]:
+        return {'source': s, 'target': t, 'edges': edge_dicts(*edges)}
+
+    return [_make_merged_edge_dict(*merged_edge) for merged_edge in merged_edges]
+
+
 def cover_dicts(*edges: tuple[int, int]) -> list[dict[str, Any]]:
     covers = []
     for i, j in edges:
@@ -310,6 +322,7 @@ def test_get_successors() -> None:
         'next': 19,
         'nodes': node_dicts(18),
         'edges': edge_dicts((11, 12)),
+        'merged_edges': merged_edge_dicts((17, 18, (14, 15))),
         'splits': split_dicts((12, [(13, mlTop()), (14, mlTop())])),
         'covers': cover_dicts((14, 11)),
         'ndbranches': ndbranch_dicts((13, [(16, False), (17, False)])),
@@ -318,12 +331,14 @@ def test_get_successors() -> None:
 
     # When
     edges = set(cfg.edges(source_id=11))
+    merged_edges = set(cfg.merged_edges(source_id=17))
     covers = set(cfg.covers(source_id=14))
     splits = sorted(cfg.splits(source_id=12))
     ndbranches = set(cfg.ndbranches(source_id=13))
 
     # Then
     assert edges == {edge(11, 12)}
+    assert merged_edges == {merged_edge(17, 18, [edge(14, 15)])}
     assert covers == {cover(14, 11)}
     assert splits == [split(12, [13, 14])]
     assert ndbranches == {ndbranch(13, [16, 17])}
@@ -344,8 +359,9 @@ def test_get_predecessors() -> None:
 def test_reachable_nodes() -> None:
     # Given
     d = {
-        'nodes': node_dicts(20),
+        'nodes': node_dicts(21),
         'edges': edge_dicts((13, 15), (14, 15), (15, 12)),
+        'merged_edges': merged_edge_dicts((20, 21, (12, 13))),
         'covers': cover_dicts((12, 13)),
         'splits': split_dicts(
             (16, [(12, mlTop()), (13, mlTop()), (17, mlTop())]), (17, [(12, mlTop()), (18, mlTop())])
@@ -362,16 +378,17 @@ def test_reachable_nodes() -> None:
 
     # Then
     assert nodes_2 == {node(12), node(13), node(15)}
-    assert nodes_3 == {node(16), node(12), node(13), node(17), node(18), node(15), node(19), node(20)}
+    assert nodes_3 == {node(16), node(12), node(13), node(17), node(18), node(15), node(19), node(20), node(21)}
     assert nodes_4 == {node(13), node(16), node(12), node(15), node(17), node(14)}
     assert nodes_5 == {node(19), node(18), node(17), node(16)}
 
 
 def test_paths_between() -> None:
     # Given
     d = {
-        'nodes': node_dicts(20),
+        'nodes': node_dicts(21),
         'edges': edge_dicts((13, 15), (14, 15), (15, 12)),
+        'merged_edges': merged_edge_dicts((20, 21, (12, 13))),
         'covers': cover_dicts((12, 13)),
         'splits': split_dicts(
             (16, [(12, mlTop()), (13, mlTop()), (17, mlTop())]), (17, [(12, mlTop()), (18, mlTop())])
@@ -391,11 +408,11 @@ def test_paths_between() -> None:
     ]
 
     # When
-    paths = sorted(cfg.paths_between(17, 20))
+    paths = sorted(cfg.paths_between(17, 21))
 
     # Then
     assert paths == [
-        (split(17, [18]), ndbranch(18, [20])),
+        (split(17, [18]), ndbranch(18, [20]), merged_edge(20, 21, [edge(12, 13)])),
     ]
 
 
@@ -914,7 +931,8 @@ def test_pretty_print() -> None:
     d = {
         'nodes': nodes,
         'aliases': {'foo': 14, 'bar': 14},
-        'edges': edge_dicts((21, 12), (12, 13, 5), (13, 14), (15, 16), (16, 13), (18, 17), (22, 19)),
+        'edges': edge_dicts((12, 13, 5), (13, 14), (15, 16), (16, 13), (18, 17), (22, 19)),
+        'merged_edges': merged_edge_dicts((21, 12, (21, 12), (21, 13))),
         'covers': cover_dicts((19, 22)),
         'splits': split_dicts(
             (
@@ -940,7 +958,7 @@ def test_pretty_print() -> None:
         '\n'
         '┌─ 21 (root)\n'
         '│\n'
-        '│  (1 step)\n'
+        '│  (1|1 steps)\n'
         '├─ 12\n'
         '│\n'
         '│  (5 steps)\n'
@@ -1026,7 +1044,7 @@ def test_pretty_print() -> None:
         '│       V21\n'
         '│     </top>\n'
         '│\n'
-        '│  (1 step)\n'
+        '│  (1|1 steps)\n'
         '├─ 12\n'
         '│     <top>\n'
         '│       V12\n'