DAG test org

This commit is contained in:
John Lancaster
2026-02-21 11:30:39 -06:00
parent ec32c8417d
commit d71d40c4d3

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@@ -18,194 +18,190 @@ class TestDAGInit:
assert g.on_remove is None assert g.on_remove is None
class TestDAGAddEdge: class TestDAGOps:
"""Test adding edges.""" class TestDAGAddEdge:
"""Test adding edges."""
def test_add_single_edge(self) -> None: def test_add_single_edge(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") g.add_edge("a", "b")
assert "b" in g["a"] assert "b" in g["a"]
assert "a" in g.reverse["b"] assert "a" in g.reverse["b"]
def test_add_multiple_edges(self) -> None: def test_add_multiple_edges(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") g.add_edge("a", "b")
g.add_edge("a", "c") g.add_edge("a", "c")
g.add_edge("b", "c") g.add_edge("b", "c")
assert "b" in g["a"] assert "b" in g["a"]
assert "c" in g["a"] assert "c" in g["a"]
assert "c" in g["b"] assert "c" in g["b"]
def test_add_edge_creates_nodes(self) -> None: def test_add_edge_creates_nodes(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") g.add_edge("a", "b")
assert "a" in g._succ assert "a" in g._succ
assert "b" in g._pred assert "b" in g._pred
def test_self_loop_raises_error(self) -> None: def test_self_loop_raises_error(self) -> None:
g = DAG[str]() g = DAG[str]()
with pytest.raises(ValueError, match="Self-loops are not allowed"): with pytest.raises(ValueError, match="Self-loops are not allowed"):
g.add_edge("a", "a") g.add_edge("a", "a")
def test_add_duplicate_edge_idempotent(self) -> None: def test_add_duplicate_edge_idempotent(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") g.add_edge("a", "b")
g.add_edge("a", "b") g.add_edge("a", "b")
assert len(g["a"]) == 1 assert len(g["a"]) == 1
class TestDAGRemoveEdge:
"""Test removing edges."""
def test_remove_existing_edge(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
g.remove_edge("a", "b")
assert "b" not in g["a"]
assert "a" not in g.reverse["b"]
def test_remove_nonexistent_edge_missing_ok(self) -> None:
g = DAG[str]()
g.remove_edge("a", "b", missing_ok=True) # should not raise
def test_remove_nonexistent_edge_error(self) -> None:
g = DAG[str]()
with pytest.raises(KeyError):
g.remove_edge("a", "b", missing_ok=False)
class TestDAGDiscardNode:
"""Test node removal."""
def test_discard_node_removes_outgoing_edges(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
g.add_edge("a", "c")
g.discard_node("a")
assert "a" not in g._succ
assert "a" not in g.reverse["b"]
assert "a" not in g.reverse["c"]
def test_discard_node_removes_incoming_edges(self) -> None:
g = DAG[str]()
g.add_edge("a", "c")
g.add_edge("b", "c")
g.discard_node("c")
assert "c" not in g._pred
assert "c" not in g["a"]
assert "c" not in g["b"]
def test_discard_nonexistent_node(self) -> None:
g = DAG[str]()
g.discard_node("z") # should not raise
class TestDAGRemoveEdge: class TestDAGBasicOps:
"""Test removing edges.""" class TestSetItem:
"""Test dictionary-style assignment."""
def test_remove_existing_edge(self) -> None: def test_with_set(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") g["a"] = {"b", "c"}
g.remove_edge("a", "b") assert "b" in g["a"]
assert "b" not in g["a"] assert "c" in g["a"]
assert "a" not in g.reverse["b"]
def test_remove_nonexistent_edge_missing_ok(self) -> None: def test_with_list(self) -> None:
g = DAG[str]() g = DAG[str]()
g.remove_edge("a", "b", missing_ok=True) # should not raise g["a"] = ["b", "c"]
assert "b" in g["a"]
assert "c" in g["a"]
def test_remove_nonexistent_edge_error(self) -> None: def test_with_string(self) -> None:
g = DAG[str]() g = DAG[str]()
with pytest.raises(KeyError): g["a"] = "b"
g.remove_edge("a", "b", missing_ok=False) assert "b" in g["a"]
def test_with_single_item(self) -> None:
g = DAG[int]()
g[1] = 2
assert 2 in g[1]
def test_updates_reverse(self) -> None:
g = DAG[str]()
g["a"] = {"b", "c"}
assert "a" in g.reverse["b"]
assert "a" in g.reverse["c"]
class TestGetItem:
"""Test dictionary-style access."""
def test_getitem_returns_dagset(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
dagset = g["a"]
assert "b" in dagset
def test_getitem_empty_node(self) -> None:
g = DAG[str]()
dagset = g["nonexistent"]
assert len(dagset) == 0
def test_getitem_mutation_updates_graph(self) -> None:
g = DAG[str]()
g["a"].add("b")
assert "b" in g["a"]
assert "a" in g.reverse["b"]
def test_getitem_mutation_triggers_callbacks(self) -> None:
added: list[tuple[str, str]] = []
g = DAG[str]()
g.on_add = lambda u, v: added.append((u, v))
g["a"].add("b")
assert ("a", "b") in added
class TestDAGDelItem:
"""Test del operation."""
def test_removes_node(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
del g["a"]
assert "a" not in g._succ
class TestDAGDiscardNode: class TestDAGIterOps:
"""Test node removal.""" class TestIter:
"""Test iteration."""
def test_discard_node_removes_outgoing_edges(self) -> None: def test_empty(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") assert list(g) == []
g.add_edge("a", "c")
g.discard_node("a")
assert "a" not in g._succ
assert "a" not in g.reverse["b"]
assert "a" not in g.reverse["c"]
def test_discard_node_removes_incoming_edges(self) -> None: def test_returns_nodes(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "c") g.add_edge("a", "b")
g.add_edge("b", "c") g.add_edge("b", "c")
g.discard_node("c") assert {"a", "b"} == set(g)
assert "c" not in g._pred
assert "c" not in g["a"]
assert "c" not in g["b"]
def test_discard_nonexistent_node(self) -> None: class TestLen:
g = DAG[str]() """Test length (edge count)."""
g.discard_node("z") # should not raise
def test_len_empty(self) -> None:
g = DAG[str]()
assert len(g) == 0
class TestDAGGetItem: def test_len_counts_edges(self) -> None:
"""Test dictionary-style access.""" g = DAG[str]()
g.add_edge("a", "b")
g.add_edge("a", "c")
g.add_edge("b", "c")
assert len(g) == 3
def test_getitem_returns_dagset(self) -> None: def test_len_after_removal(self) -> None:
g = DAG[str]() g = DAG[str]()
g.add_edge("a", "b") g.add_edge("a", "b")
dagset = g["a"] g.add_edge("a", "c")
assert "b" in dagset g.remove_edge("a", "b")
assert len(g) == 1
def test_getitem_empty_node(self) -> None:
g = DAG[str]()
dagset = g["nonexistent"]
assert len(dagset) == 0
def test_getitem_mutation_updates_graph(self) -> None:
g = DAG[str]()
g["a"].add("b")
assert "b" in g["a"]
assert "a" in g.reverse["b"]
def test_getitem_mutation_triggers_callbacks(self) -> None:
added: list[tuple[str, str]] = []
g = DAG[str]()
g.on_add = lambda u, v: added.append((u, v))
g["a"].add("b")
assert ("a", "b") in added
class TestDAGSetItem:
"""Test dictionary-style assignment."""
def test_setitem_with_set(self) -> None:
g = DAG[str]()
g["a"] = {"b", "c"}
assert "b" in g["a"]
assert "c" in g["a"]
def test_setitem_with_list(self) -> None:
g = DAG[str]()
g["a"] = ["b", "c"]
assert "b" in g["a"]
assert "c" in g["a"]
def test_setitem_with_string(self) -> None:
g = DAG[str]()
g["a"] = "b"
assert "b" in g["a"]
def test_setitem_with_single_item(self) -> None:
g = DAG[int]()
g[1] = 2
assert 2 in g[1]
def test_setitem_updates_reverse(self) -> None:
g = DAG[str]()
g["a"] = {"b", "c"}
assert "a" in g.reverse["b"]
assert "a" in g.reverse["c"]
class TestDAGDelItem:
"""Test del operation."""
def test_delitem_removes_node(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
del g["a"]
assert "a" not in g._succ
class TestDAGIter:
"""Test iteration."""
def test_iter_empty(self) -> None:
g = DAG[str]()
assert list(g) == []
def test_iter_returns_nodes(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
g.add_edge("b", "c")
nodes = set(g)
assert "a" in nodes
assert "b" in nodes
class TestDAGLen:
"""Test length (edge count)."""
def test_len_empty(self) -> None:
g = DAG[str]()
assert len(g) == 0
def test_len_counts_edges(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
g.add_edge("a", "c")
g.add_edge("b", "c")
assert len(g) == 3
def test_len_after_removal(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
g.add_edge("a", "c")
g.remove_edge("a", "b")
assert len(g) == 1
class TestDAGReverse: class TestDAGReverse:
@@ -252,24 +248,6 @@ class TestDAGCallbacks:
assert ("a", "b") in removed assert ("a", "b") in removed
class TestDAGRepr:
"""Test string representation."""
def test_repr_empty(self) -> None:
g = DAG[str]()
r = repr(g)
assert "DAG" in r
assert "{}" in r
def test_repr_with_edges(self) -> None:
g = DAG[str]()
g.add_edge("a", "b")
r = repr(g)
assert "DAG" in r
assert "a" in r
assert "b" in r
class TestDAGComplexScenarios: class TestDAGComplexScenarios:
"""Test complex usage patterns.""" """Test complex usage patterns."""