test_graph_service.py
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| 1 | """TDD — IdentityGraphService integration tests. |
| 2 | |
| 3 | All three invariants enforced atomically through one surface. |
| 4 | Mutations either fully commit or fully reject — no partial writes. |
| 5 | """ |
| 6 | from __future__ import annotations |
| 7 | |
| 8 | from decimal import Decimal |
| 9 | |
| 10 | import pytest |
| 11 | |
| 12 | from musehub.graph.dag import EdgeType, NodeType |
| 13 | from musehub.graph.cycle import CycleError |
| 14 | from musehub.graph.service import IdentityGraphService |
| 15 | |
| 16 | |
| 17 | # ── Fixtures ────────────────────────────────────────────────────────────────── |
| 18 | |
| 19 | @pytest.fixture |
| 20 | def svc() -> IdentityGraphService: |
| 21 | return IdentityGraphService() |
| 22 | |
| 23 | |
| 24 | @pytest.fixture |
| 25 | def human_and_agent(svc: IdentityGraphService) -> IdentityGraphService: |
| 26 | svc.add_identity("alice", NodeType.HUMAN) |
| 27 | svc.add_identity("bot-1", NodeType.AGENT) |
| 28 | svc.add_spawn("alice", "bot-1") |
| 29 | return svc |
| 30 | |
| 31 | |
| 32 | @pytest.fixture |
| 33 | def two_orgs(svc: IdentityGraphService) -> IdentityGraphService: |
| 34 | svc.add_identity("alice", NodeType.HUMAN) |
| 35 | svc.add_identity("acme", NodeType.ORG, quorum=1) |
| 36 | svc.add_identity("lab", NodeType.ORG, quorum=1) |
| 37 | svc.add_membership("alice", "acme", weight=Decimal("1")) |
| 38 | return svc |
| 39 | |
| 40 | |
| 41 | # ── add_identity ────────────────────────────────────────────────────────────── |
| 42 | |
| 43 | class TestAddIdentity: |
| 44 | def test_add_human(self, svc: IdentityGraphService) -> None: |
| 45 | svc.add_identity("alice", NodeType.HUMAN) |
| 46 | assert svc.node_type("alice") == NodeType.HUMAN |
| 47 | |
| 48 | def test_add_agent(self, svc: IdentityGraphService) -> None: |
| 49 | svc.add_identity("bot-1", NodeType.AGENT) |
| 50 | assert svc.node_type("bot-1") == NodeType.AGENT |
| 51 | |
| 52 | def test_add_org(self, svc: IdentityGraphService) -> None: |
| 53 | svc.add_identity("acme", NodeType.ORG, quorum=2) |
| 54 | assert svc.node_type("acme") == NodeType.ORG |
| 55 | |
| 56 | def test_duplicate_handle_raises(self, svc: IdentityGraphService) -> None: |
| 57 | svc.add_identity("alice", NodeType.HUMAN) |
| 58 | with pytest.raises(ValueError, match="already exists"): |
| 59 | svc.add_identity("alice", NodeType.AGENT) |
| 60 | |
| 61 | def test_unknown_handle_raises_on_lookup(self, svc: IdentityGraphService) -> None: |
| 62 | with pytest.raises(KeyError): |
| 63 | svc.node_type("ghost") |
| 64 | |
| 65 | |
| 66 | # ── add_spawn ───────────────────────────────────────────────────────────────── |
| 67 | |
| 68 | class TestAddSpawn: |
| 69 | def test_human_spawns_agent(self, svc: IdentityGraphService) -> None: |
| 70 | svc.add_identity("alice", NodeType.HUMAN) |
| 71 | svc.add_identity("bot-1", NodeType.AGENT) |
| 72 | svc.add_spawn("alice", "bot-1") |
| 73 | assert svc.root_distance("bot-1") == 1 |
| 74 | |
| 75 | def test_agent_spawns_agent(self, human_and_agent: IdentityGraphService) -> None: |
| 76 | human_and_agent.add_identity("bot-2", NodeType.AGENT) |
| 77 | human_and_agent.add_spawn("bot-1", "bot-2") |
| 78 | assert human_and_agent.root_distance("bot-2") == 2 |
| 79 | |
| 80 | def test_spawn_cycle_rejected_atomically(self, human_and_agent: IdentityGraphService) -> None: |
| 81 | with pytest.raises(CycleError): |
| 82 | human_and_agent.add_spawn("bot-1", "alice") |
| 83 | # graph must be unchanged — alice still has depth 0 |
| 84 | assert human_and_agent.root_distance("alice") == 0 |
| 85 | |
| 86 | def test_unknown_spawner_raises(self, svc: IdentityGraphService) -> None: |
| 87 | svc.add_identity("bot-1", NodeType.AGENT) |
| 88 | with pytest.raises(KeyError): |
| 89 | svc.add_spawn("nobody", "bot-1") |
| 90 | |
| 91 | def test_unknown_spawnee_raises(self, svc: IdentityGraphService) -> None: |
| 92 | svc.add_identity("alice", NodeType.HUMAN) |
| 93 | with pytest.raises(KeyError): |
| 94 | svc.add_spawn("alice", "nobody") |
| 95 | |
| 96 | |
| 97 | # ── add_membership ──────────────────────────────────────────────────────────── |
| 98 | |
| 99 | class TestAddMembership: |
| 100 | def test_human_joins_org(self, svc: IdentityGraphService) -> None: |
| 101 | svc.add_identity("alice", NodeType.HUMAN) |
| 102 | svc.add_identity("acme", NodeType.ORG, quorum=1) |
| 103 | svc.add_membership("alice", "acme", weight=Decimal("1")) |
| 104 | assert svc.root_distance("acme") == 1 |
| 105 | |
| 106 | def test_org_joins_parent_org(self, two_orgs: IdentityGraphService) -> None: |
| 107 | two_orgs.add_membership("acme", "lab", weight=Decimal("1")) |
| 108 | assert two_orgs.root_distance("lab") == 2 |
| 109 | |
| 110 | def test_membership_cycle_rejected_atomically(self, two_orgs: IdentityGraphService) -> None: |
| 111 | two_orgs.add_membership("acme", "lab", weight=Decimal("1")) |
| 112 | with pytest.raises(CycleError): |
| 113 | two_orgs.add_membership("lab", "acme", weight=Decimal("1")) |
| 114 | # acme still has depth 1, not corrupted |
| 115 | assert two_orgs.root_distance("acme") == 1 |
| 116 | |
| 117 | def test_non_org_target_raises(self, svc: IdentityGraphService) -> None: |
| 118 | svc.add_identity("alice", NodeType.HUMAN) |
| 119 | svc.add_identity("bob", NodeType.HUMAN) |
| 120 | with pytest.raises(ValueError, match="not an org"): |
| 121 | svc.add_membership("alice", "bob", weight=Decimal("1")) |
| 122 | |
| 123 | |
| 124 | # ── root_distance ───────────────────────────────────────────────────────────── |
| 125 | |
| 126 | class TestRootDistance: |
| 127 | def test_human_is_zero(self, svc: IdentityGraphService) -> None: |
| 128 | svc.add_identity("alice", NodeType.HUMAN) |
| 129 | assert svc.root_distance("alice") == 0 |
| 130 | |
| 131 | def test_orphan_agent_is_none(self, svc: IdentityGraphService) -> None: |
| 132 | svc.add_identity("bot-1", NodeType.AGENT) |
| 133 | assert svc.root_distance("bot-1") is None |
| 134 | |
| 135 | def test_depth_updates_after_spawn(self, svc: IdentityGraphService) -> None: |
| 136 | svc.add_identity("alice", NodeType.HUMAN) |
| 137 | svc.add_identity("bot-1", NodeType.AGENT) |
| 138 | assert svc.root_distance("bot-1") is None |
| 139 | svc.add_spawn("alice", "bot-1") |
| 140 | assert svc.root_distance("bot-1") == 1 |
| 141 | |
| 142 | def test_depth_updates_cascade(self, svc: IdentityGraphService) -> None: |
| 143 | # add chain incrementally, verify depth updates at each step |
| 144 | svc.add_identity("h", NodeType.HUMAN) |
| 145 | svc.add_identity("a1", NodeType.AGENT) |
| 146 | svc.add_identity("a2", NodeType.AGENT) |
| 147 | svc.add_identity("a3", NodeType.AGENT) |
| 148 | |
| 149 | svc.add_spawn("h", "a1") |
| 150 | assert svc.root_distance("a1") == 1 |
| 151 | assert svc.root_distance("a2") is None |
| 152 | |
| 153 | svc.add_spawn("a1", "a2") |
| 154 | assert svc.root_distance("a2") == 2 |
| 155 | |
| 156 | svc.add_spawn("a2", "a3") |
| 157 | assert svc.root_distance("a3") == 3 |
| 158 | |
| 159 | |
| 160 | # ── is_quorum_met ───────────────────────────────────────────────────────────── |
| 161 | |
| 162 | class TestServiceQuorum: |
| 163 | def test_simple_quorum_via_service(self, svc: IdentityGraphService) -> None: |
| 164 | svc.add_identity("alice", NodeType.HUMAN) |
| 165 | svc.add_identity("bob", NodeType.HUMAN) |
| 166 | svc.add_identity("acme", NodeType.ORG, quorum=2) |
| 167 | svc.add_membership("alice", "acme", weight=Decimal("1")) |
| 168 | svc.add_membership("bob", "acme", weight=Decimal("1")) |
| 169 | |
| 170 | assert svc.is_quorum_met("acme", voters={"alice", "bob"}) is True |
| 171 | assert svc.is_quorum_met("acme", voters={"alice"}) is False |
| 172 | |
| 173 | def test_nested_quorum_via_service(self, svc: IdentityGraphService) -> None: |
| 174 | svc.add_identity("alice", NodeType.HUMAN) |
| 175 | svc.add_identity("sub-org", NodeType.ORG, quorum=1) |
| 176 | svc.add_identity("parent", NodeType.ORG, quorum=2) |
| 177 | svc.add_membership("alice", "sub-org", weight=Decimal("1")) |
| 178 | svc.add_membership("sub-org", "parent", weight=Decimal("1")) |
| 179 | # need another direct member for parent quorum=2 |
| 180 | svc.add_identity("bob", NodeType.HUMAN) |
| 181 | svc.add_membership("bob", "parent", weight=Decimal("1")) |
| 182 | |
| 183 | # alice votes in sub-org → sub-org quorum met → sub-org vote in parent counts |
| 184 | # bob votes in parent directly → total = 2 → met |
| 185 | assert svc.is_quorum_met( |
| 186 | "parent", |
| 187 | voters={"alice", "sub-org", "bob"}, |
| 188 | sub_votes={"sub-org": {"alice"}}, |
| 189 | ) is True |
| 190 | |
| 191 | # sub-org votes in parent but nobody voted inside it → doesn't count |
| 192 | assert svc.is_quorum_met( |
| 193 | "parent", |
| 194 | voters={"sub-org", "bob"}, |
| 195 | sub_votes={}, |
| 196 | ) is False |
| 197 | |
| 198 | |
| 199 | # ── human_ancestors ─────────────────────────────────────────────────────────── |
| 200 | |
| 201 | class TestServiceAncestors: |
| 202 | def test_agent_inherits_human_spawner(self, svc: IdentityGraphService) -> None: |
| 203 | svc.add_identity("alice", NodeType.HUMAN) |
| 204 | svc.add_identity("bot", NodeType.AGENT) |
| 205 | svc.add_spawn("alice", "bot") |
| 206 | assert svc.human_ancestors("bot") == {"alice"} |
| 207 | |
| 208 | def test_org_inherits_all_human_members(self, svc: IdentityGraphService) -> None: |
| 209 | svc.add_identity("alice", NodeType.HUMAN) |
| 210 | svc.add_identity("bob", NodeType.HUMAN) |
| 211 | svc.add_identity("acme", NodeType.ORG, quorum=1) |
| 212 | svc.add_membership("alice", "acme", weight=Decimal("1")) |
| 213 | svc.add_membership("bob", "acme", weight=Decimal("1")) |
| 214 | assert svc.human_ancestors("acme") == {"alice", "bob"} |
| 215 | |
| 216 | def test_no_ancestors_is_empty_set(self, svc: IdentityGraphService) -> None: |
| 217 | svc.add_identity("bot", NodeType.AGENT) |
| 218 | assert svc.human_ancestors("bot") == set() |