Upload tests/test_tags.py

tests/test_tags.py

@@ -0,0 +1,63 @@
+"""Tests for FR-6 + R-2 (Tag + TagLink, polymorphic parent validation, unique constraint)."""
+
+from __future__ import annotations
+
+import pytest
+from httpx import AsyncClient
+
+
+@pytest.mark.asyncio
+async def test_create_tag(
+    client: AsyncClient, auth_headers: dict[str, str]
+) -> None:
+    resp = await client.post(
+        "/api/v1/tags/",
+        json={"name": "Important", "color": "#FF0000"},
+        headers=auth_headers,
+    )
+    assert resp.status_code == 201, resp.text
+    body = resp.json()
+    assert body["name"] == "Important"
+    assert body["color"] == "#FF0000"
+
+
+@pytest.mark.asyncio
+async def test_link_tag_to_valid_parent(
+    client: AsyncClient, auth_headers: dict[str, str], seed_data: dict
+) -> None:
+    tag_id = seed_data["tag_ids"][0]
+    acc_id = seed_data["account_ids"][0]
+    resp = await client.post(
+        "/api/v1/tags/link",
+        json={"tag_id": tag_id, "parent_type": "account", "parent_id": acc_id},
+        headers=auth_headers,
+    )
+    assert resp.status_code == 201, resp.text
+
+
+@pytest.mark.asyncio
+async def test_link_tag_to_invalid_parent(
+    client: AsyncClient, auth_headers: dict[str, str], seed_data: dict
+) -> None:
+    """R-2: invalid parent → 404."""
+    tag_id = seed_data["tag_ids"][0]
+    resp = await client.post(
+        "/api/v1/tags/link",
+        json={"tag_id": tag_id, "parent_type": "account", "parent_id": 99999},
+        headers=auth_headers,
+    )
+    assert resp.status_code == 404
+
+
+@pytest.mark.asyncio
+async def test_unique_constraint_on_link(
+    client: AsyncClient, auth_headers: dict[str, str], seed_data: dict
+) -> None:
+    """Second link with same (tag, parent_type, parent_id) → 409."""
+    tag_id = seed_data["tag_ids"][0]
+    acc_id = seed_data["account_ids"][0]
+    payload = {"tag_id": tag_id, "parent_type": "account", "parent_id": acc_id}
+    r1 = await client.post("/api/v1/tags/link", json=payload, headers=auth_headers)
+    assert r1.status_code == 201, r1.text
+    r2 = await client.post("/api/v1/tags/link", json=payload, headers=auth_headers)
+    assert r2.status_code == 409