Tests: pytest-Suite für Konten, Haushalt, Kanban, Reisen und Migrationen

- backend/tests: jede Test-Funktion bekommt eine frische Datenbank;
  test_migrationen.py baut ältere Datenbank-Stände nach und prüft die
  verlustfreie Umstellung (auch zweiter Start ohne Änderung)
- requirements-dev.txt mit pytest
- Fix (von den Tests gefunden): Eine neue, leere Datenbank bekam keine
  erste Liste "Zuhause"; jetzt einmalig beim ersten Start

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/app/db.py

@@ -273,6 +273,13 @@ def _migrate(conn) -> None:
     """
     info = {r["name"]: r for r in conn.execute("PRAGMA table_info(household_items)")}
     if "list_id" in info and info["list_id"]["notnull"]:
+        # Neue Datenbank: einmalig eine erste Liste anlegen (wer später alle löscht, bekommt keine zurück)
+        if get_meta(conn, "haushalt_start") is None:
+            if not conn.execute("SELECT 1 FROM shopping_lists").fetchone():
+                conn.execute(
+                    "INSERT INTO shopping_lists (name, everyone, position, created_at) VALUES ('Zuhause', 1, 1, ?)", (now_iso(),)
+                )
+            conn.execute("INSERT INTO meta (key, value) VALUES ('haushalt_start', '1')")
         return
     row = conn.execute("SELECT id FROM shopping_lists ORDER BY position, id LIMIT 1").fetchone()
     if row:
@@ -295,6 +302,7 @@ def _migrate(conn) -> None:
         (default,),
     )
     conn.execute("DROP TABLE household_items_alt")
+    conn.execute("INSERT OR REPLACE INTO meta (key, value) VALUES ('haushalt_start', '1')")
 
 
 def _migrate_checked(conn) -> None:

backend/requirements-dev.txt

@@ -0,0 +1,3 @@
+# Nur für die Entwicklung: Tests (cd backend && .venv/bin/python -m pytest)
+-r requirements.txt
+pytest==8.4.2

backend/tests/conftest.py

@@ -0,0 +1,50 @@
+"""Gemeinsame Test-Hilfen: jede Test-Funktion bekommt eine frische, leere Datenbank.
+
+Die App liest den Datenordner beim Import; deshalb zeigt P42_DATA_DIR schon vorher auf einen
+Wegwerf-Ordner. Pro Test wird db.DB_FILE auf eine neue Datei umgebogen und das Schema angelegt.
+Hintergrund-Aufgaben (lifespan) laufen nicht, weil TestClient ohne "with" benutzt wird.
+"""
+import os
+import sys
+import tempfile
+from pathlib import Path
+
+os.environ["P42_DATA_DIR"] = tempfile.mkdtemp(prefix="p42-test-")
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+import pytest  # noqa: E402
+from fastapi.testclient import TestClient  # noqa: E402
+
+from app import auth, db  # noqa: E402
+from app.main import app  # noqa: E402
+
+PASSWORD = "passwort123"
+
+
+@pytest.fixture(autouse=True)
+def fresh_db(tmp_path, monkeypatch):
+    monkeypatch.setattr(db, "DB_FILE", tmp_path / "p42.db")
+    auth._failures.clear()
+    db.init()
+    return tmp_path / "p42.db"
+
+
+@pytest.fixture
+def conn(fresh_db):
+    c = db.connect()
+    yield c
+    c.close()
+
+
+@pytest.fixture
+def login():
+    """login("anna", admin=True) → angemeldeter TestClient mit .user (id, name)."""
+    def make(username: str, admin: bool = False) -> TestClient:
+        with db.transaction() as c:
+            user_id = auth._create_user(c, username, username.capitalize(), PASSWORD, admin)
+        client = TestClient(app)
+        res = client.post("/api/auth/login", json={"username": username, "password": PASSWORD})
+        assert res.status_code == 200, res.text
+        client.user = {"id": user_id, "name": username.capitalize()}
+        return client
+    return make

backend/tests/test_auth.py

@@ -0,0 +1,28 @@
+from fastapi.testclient import TestClient
+
+from app.main import app
+
+
+def test_ohne_anmeldung_gesperrt():
+    assert TestClient(app).get("/api/haushalt").status_code == 401
+
+
+def test_erstes_konto_wird_admin():
+    client = TestClient(app)
+    assert client.get("/api/auth/status").json()["setupRequired"] is True
+    res = client.post("/api/auth/setup", json={"username": "erste", "password": "passwort123"})
+    assert res.status_code == 200
+    assert res.json()["isAdmin"] is True
+    # Danach gibt es kein zweites "erstes Konto"
+    assert TestClient(app).post("/api/auth/setup", json={"username": "zweite", "password": "passwort123"}).status_code == 403
+
+
+def test_falsches_passwort(login):
+    login("anna")
+    res = TestClient(app).post("/api/auth/login", json={"username": "anna", "password": "falsch"})
+    assert res.status_code == 401
+
+
+def test_benutzerverwaltung_nur_admin(login):
+    assert login("anna").get("/api/users").status_code == 403
+    assert login("chef", admin=True).get("/api/users").status_code == 200

backend/tests/test_haushalt.py

@@ -0,0 +1,140 @@
+def state(client):
+    return client.get("/api/haushalt").json()
+
+
+def add(client, list_id, name, area="einkauf", quantity=1, unit="stk"):
+    return client.post("/api/haushalt/items", json={"list": area, "name": name, "quantity": quantity, "unit": unit, "listId": list_id})
+
+
+def items(data, list_id, area=None):
+    return [i for i in data["items"] if i["listId"] == list_id and (area is None or i["list"] == area)]
+
+
+def new_list(client, name, everyone=True, members=()):
+    res = client.post("/api/haushalt/listen", json={"name": name, "everyone": everyone, "members": list(members)})
+    assert res.status_code == 201, res.text
+    return res.json()["created"]
+
+
+def test_neue_db_hat_liste_zuhause(login):
+    data = state(login("anna"))
+    assert [l["name"] for l in data["lists"]] == ["Zuhause"]
+    assert data["lists"][0]["everyone"] is True
+
+
+def test_hinzufuegen_fuehrt_zusammen_und_vereinheitlicht_namen(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    add(anna, home, "milch", quantity=2)
+    data = add(anna, home, "Milch", quantity=1).json()
+    assert [(i["name"], i["quantity"]) for i in items(data, home, "einkauf")] == [("Milch", 3)]
+    # Andere Einheit = eigene Zeile
+    data = add(anna, home, "Milch", quantity=1.5, unit="l").json()
+    assert len(items(data, home, "einkauf")) == 2
+
+
+def test_listen_haben_eigenen_vorrat(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    urlaub = new_list(anna, "Urlaub")
+    add(anna, urlaub, "Brot", area="vorrat")
+    data = state(anna)
+    assert [i["name"] for i in items(data, urlaub, "vorrat")] == ["Brot"]
+    assert items(data, home, "vorrat") == []
+
+
+def test_private_liste_nur_fuer_mitglieder(login):
+    anna, ben, chef = login("anna"), login("ben"), login("chef", admin=True)
+    geheim = new_list(anna, "Geheim", everyone=False)
+    item = add(anna, geheim, "Kuchen").json()
+    item_id = items(item, geheim)[0]["id"]
+
+    for other in (ben, chef):  # auch Admins sehen fremde private Listen nicht
+        assert all(l["id"] != geheim for l in state(other)["lists"])
+        assert add(other, geheim, "x").status_code == 404
+        assert other.patch(f"/api/haushalt/items/{item_id}", json={"quantity": 5}).status_code == 404
+
+    anna.patch(f"/api/haushalt/listen/{geheim}", json={"name": "Geheim", "everyone": False, "members": [ben.user["id"]]})
+    lst = next(l for l in state(ben)["lists"] if l["id"] == geheim)
+    assert lst["canManage"] is False
+    assert ben.patch(f"/api/haushalt/listen/{geheim}", json={"name": "x"}).status_code == 403
+    assert ben.delete(f"/api/haushalt/listen/{geheim}").status_code == 403
+
+
+def test_liste_loeschen_entfernt_eintraege(login, conn):
+    anna = login("anna")
+    urlaub = new_list(anna, "Urlaub")
+    add(anna, urlaub, "Brot", area="vorrat")
+    add(anna, urlaub, "Wasser")
+    assert anna.delete(f"/api/haushalt/listen/{urlaub}").status_code == 200
+    assert conn.execute("SELECT COUNT(*) FROM household_items WHERE list_id = ?", (urlaub,)).fetchone()[0] == 0
+
+
+def test_ungueltiges_mitglied(login):
+    res = login("anna").post("/api/haushalt/listen", json={"name": "x", "everyone": False, "members": [9999]})
+    assert res.status_code == 400
+
+
+def test_abhaken_und_einkauf_beenden(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    add(anna, home, "Milch", quantity=2)
+    add(anna, home, "Brot")
+    add(anna, home, "Milch", area="vorrat", quantity=1)
+    milch = next(i for i in items(state(anna), home, "einkauf") if i["name"] == "Milch")
+
+    data = anna.patch(f"/api/haushalt/items/{milch['id']}", json={"checked": True}).json()
+    # Abgehakt bleibt auf der Einkaufsliste
+    assert {i["name"]: i["checked"] for i in items(data, home, "einkauf")} == {"Milch": True, "Brot": False}
+
+    res = anna.post(f"/api/haushalt/listen/{home}/einkauf-beenden")
+    assert res.json()["moved"] == 1
+    data = res.json()
+    assert [i["name"] for i in items(data, home, "einkauf")] == ["Brot"]
+    assert [(i["name"], i["quantity"]) for i in items(data, home, "vorrat")] == [("Milch", 3)]
+    # Nichts mehr abgehakt
+    assert anna.post(f"/api/haushalt/listen/{home}/einkauf-beenden").status_code == 400
+
+
+def test_vorrat_laesst_sich_nicht_abhaken(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    vorrat = items(add(anna, home, "Reis", area="vorrat").json(), home, "vorrat")[0]
+    assert anna.patch(f"/api/haushalt/items/{vorrat['id']}", json={"checked": True}).status_code == 400
+
+
+def test_erneut_hinzufuegen_hebt_haken_auf(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    milch = items(add(anna, home, "Milch").json(), home)[0]
+    anna.patch(f"/api/haushalt/items/{milch['id']}", json={"checked": True})
+    data = add(anna, home, "Milch").json()
+    assert items(data, home)[0]["checked"] is False
+
+
+def test_aufgebraucht_kommt_mit_menge_1_auf_einkauf(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    reis = items(add(anna, home, "Reis", area="vorrat", quantity=4).json(), home)[0]
+    data = anna.post(f"/api/haushalt/items/{reis['id']}/move").json()
+    assert [(i["list"], i["quantity"]) for i in items(data, home)] == [("einkauf", 1)]
+
+
+def test_rezept_uebernehmen_in_gewaehlte_liste(login):
+    anna = login("anna")
+    urlaub = new_list(anna, "Urlaub")
+    res = anna.post("/api/haushalt/rezept/uebernehmen", json={
+        "items": [{"name": "Mehl", "quantity": 0.5, "unit": "kg"}], "aliases": [], "listId": urlaub,
+    })
+    assert res.status_code == 200
+    assert [(i["name"], i["quantity"], i["unit"]) for i in items(res.json(), urlaub, "einkauf")] == [("Mehl", 0.5, "kg")]
+
+
+def test_einheitenwechsel_fuehrt_zusammen(login):
+    anna = login("anna")
+    home = state(anna)["lists"][0]["id"]
+    add(anna, home, "Mehl", quantity=1, unit="kg")
+    stk = items(add(anna, home, "Mehl", quantity=2).json(), home)
+    stk = next(i for i in stk if i["unit"] == "stk")
+    data = anna.patch(f"/api/haushalt/items/{stk['id']}", json={"unit": "kg"}).json()
+    assert [(i["quantity"], i["unit"]) for i in items(data, home)] == [(3, "kg")]

backend/tests/test_kanban.py

@@ -0,0 +1,65 @@
+from datetime import datetime, timedelta, timezone
+
+
+def ago(days):
+    return (datetime.now(timezone.utc) - timedelta(days=days)).isoformat(timespec="milliseconds").replace("+00:00", "Z")
+
+
+def board(client, project_id):
+    return client.get(f"/api/kanban/projekte/{project_id}").json()
+
+
+def make_board(client):
+    return client.post("/api/kanban/projekte", json={"name": "Test"}).json()["id"]
+
+
+def task(client, project_id, title, status="offen"):
+    data = client.post(f"/api/kanban/projekte/{project_id}/aufgaben", json={"title": title, "status": status}).json()
+    return next(t for t in data["tasks"] if t["title"] == title)
+
+
+def test_erledigt_setzt_und_loescht_zeitpunkt(login):
+    anna = login("anna")
+    pid = make_board(anna)
+    t = task(anna, pid, "A")
+    assert t["doneAt"] is None
+    data = anna.patch(f"/api/kanban/aufgaben/{t['id']}", json={"status": "erledigt"}).json()
+    assert next(x for x in data["tasks"] if x["id"] == t["id"])["doneAt"]
+    data = anna.patch(f"/api/kanban/aufgaben/{t['id']}", json={"status": "arbeit"}).json()
+    assert next(x for x in data["tasks"] if x["id"] == t["id"])["doneAt"] is None
+    assert task(anna, pid, "Gleich erledigt", status="erledigt")["doneAt"]
+
+
+def test_archiv_nach_2_tagen_loeschen_nach_14(login, conn):
+    anna = login("anna")
+    pid = make_board(anna)
+    for title in ("frisch", "alt", "uralt"):
+        task(anna, pid, title, status="erledigt")
+    with conn:
+        conn.execute("UPDATE kanban_tasks SET done_at = ? WHERE title = 'alt'", (ago(3),))
+        conn.execute("UPDATE kanban_tasks SET done_at = ? WHERE title = 'uralt'", (ago(15),))
+    data = board(anna, pid)
+    assert [t["title"] for t in data["tasks"]] == ["frisch"]
+    assert [t["title"] for t in data["archived"]] == ["alt"]
+    assert data["archived"][0]["deleteAt"] > ago(-10)
+    assert conn.execute("SELECT COUNT(*) FROM kanban_tasks WHERE title = 'uralt'").fetchone()[0] == 0
+
+
+def test_zurueckholen_startet_fristen_neu(login, conn):
+    anna = login("anna")
+    pid = make_board(anna)
+    t = task(anna, pid, "alt", status="erledigt")
+    with conn:
+        conn.execute("UPDATE kanban_tasks SET done_at = ? WHERE id = ?", (ago(5), t["id"]))
+    data = anna.post(f"/api/kanban/aufgaben/{t['id']}/zurueckholen").json()
+    assert data["archived"] == []
+    assert [x["title"] for x in data["tasks"]] == ["alt"]
+
+
+def test_loeschen_nur_ersteller_oder_admin(login):
+    anna, ben, chef = login("anna"), login("ben"), login("chef", admin=True)
+    pid = make_board(anna)
+    t1, t2 = task(anna, pid, "eins"), task(anna, pid, "zwei")
+    assert ben.delete(f"/api/kanban/aufgaben/{t1['id']}").status_code == 403
+    assert anna.delete(f"/api/kanban/aufgaben/{t1['id']}").status_code == 200
+    assert chef.delete(f"/api/kanban/aufgaben/{t2['id']}").status_code == 200

backend/tests/test_migrationen.py

@@ -0,0 +1,138 @@
+"""Alte Datenbank-Stände nachbauen und prüfen, dass der Start sie verlustfrei auf den aktuellen Stand bringt."""
+import sqlite3
+
+import pytest
+
+from app import db
+
+T = "2026-01-01T00:00:00.000Z"
+
+KANBAN_PROJECTS = """CREATE TABLE kanban_projects (
+    id INTEGER PRIMARY KEY, name TEXT NOT NULL, description TEXT NOT NULL DEFAULT '', position REAL NOT NULL,
+    completed_at TEXT, created_at TEXT NOT NULL, created_by INTEGER, updated_at TEXT NOT NULL, updated_by INTEGER)"""
+# Kanban-Aufgaben vor "erledigt seit"
+KANBAN_TASKS_OHNE_DONE = """CREATE TABLE kanban_tasks (
+    id INTEGER PRIMARY KEY, project_id INTEGER NOT NULL REFERENCES kanban_projects(id) ON DELETE CASCADE,
+    title TEXT NOT NULL, description TEXT NOT NULL DEFAULT '', status TEXT NOT NULL, assignee INTEGER,
+    priority INTEGER NOT NULL DEFAULT 2, position REAL NOT NULL, created_at TEXT NOT NULL, created_by INTEGER,
+    updated_at TEXT NOT NULL, updated_by INTEGER)"""
+# Reise-Städte vor Höhe, Zeitzone und Hauptstadt
+TRAVEL_ALT = """CREATE TABLE travel_cities (
+    id INTEGER PRIMARY KEY, user_id INTEGER NOT NULL, geoname_id INTEGER NOT NULL, name TEXT NOT NULL,
+    admin1 TEXT NOT NULL DEFAULT '', country TEXT NOT NULL, lat REAL NOT NULL, lon REAL NOT NULL,
+    population INTEGER, created_at TEXT NOT NULL, UNIQUE (user_id, geoname_id))"""
+# Vorrat/Einkauf ganz alt: ohne Einheit
+HAUSHALT_OHNE_EINHEIT = """CREATE TABLE household_items (
+    id INTEGER PRIMARY KEY, key TEXT NOT NULL, name TEXT NOT NULL, list TEXT NOT NULL, quantity INTEGER NOT NULL,
+    updated_at TEXT NOT NULL, updated_by INTEGER, UNIQUE (key, list))"""
+# Vorrat/Einkauf mit Einheit, aber ohne Listen (Stand auf dem Server vor den Listen)
+HAUSHALT_OHNE_LISTEN = """CREATE TABLE household_items (
+    id INTEGER PRIMARY KEY, key TEXT NOT NULL, name TEXT NOT NULL, list TEXT NOT NULL, quantity REAL NOT NULL,
+    unit TEXT NOT NULL DEFAULT 'stk', updated_at TEXT NOT NULL, updated_by INTEGER, UNIQUE (key, list, unit))"""
+# Zwischenstand: mehrere Einkaufslisten, Vorrat ohne Liste (list_id NULL)
+ZWISCHENSTAND = [
+    """CREATE TABLE shopping_lists (id INTEGER PRIMARY KEY, name TEXT NOT NULL, everyone INTEGER NOT NULL DEFAULT 1,
+       position REAL NOT NULL, created_at TEXT NOT NULL, created_by INTEGER)""",
+    """CREATE TABLE household_items (
+       id INTEGER PRIMARY KEY, key TEXT NOT NULL, name TEXT NOT NULL, list TEXT NOT NULL,
+       list_id INTEGER REFERENCES shopping_lists(id) ON DELETE CASCADE, quantity REAL NOT NULL,
+       unit TEXT NOT NULL DEFAULT 'stk', updated_at TEXT NOT NULL, updated_by INTEGER,
+       CHECK ((list = 'einkauf') = (list_id IS NOT NULL)))""",
+    "CREATE UNIQUE INDEX household_vorrat ON household_items (key, unit) WHERE list_id IS NULL",
+    "CREATE UNIQUE INDEX household_einkauf ON household_items (list_id, key, unit) WHERE list_id IS NOT NULL",
+    f"INSERT INTO shopping_lists VALUES (1, 'Einkaufsliste', 1, 1, '{T}', NULL)",
+]
+
+
+@pytest.fixture
+def old_db(tmp_path, monkeypatch):
+    """Leere Datei mit den angegebenen alten Tabellen; danach db.init() wie beim Serverstart."""
+    path = tmp_path / "alt.db"
+    monkeypatch.setattr(db, "DB_FILE", path)
+
+    def build(*statements):
+        c = sqlite3.connect(path)
+        for sql in statements:
+            c.execute(sql)
+        c.commit()
+        c.close()
+        db.init()
+        conn = db.connect()
+        return conn
+    return build
+
+
+def household(conn):
+    return sorted(tuple(r) for r in conn.execute("SELECT name, list, list_id, quantity, unit, checked FROM household_items"))
+
+
+def test_haushalt_ohne_einheit(old_db):
+    conn = old_db(
+        HAUSHALT_OHNE_EINHEIT,
+        f"INSERT INTO household_items VALUES (1, 'milch', 'Milch', 'vorrat', 2, '{T}', NULL)",
+        f"INSERT INTO household_items VALUES (2, 'brot', 'Brot', 'einkauf', 1, '{T}', NULL)",
+    )
+    assert [tuple(r) for r in conn.execute("SELECT id, name FROM shopping_lists")] == [(1, "Zuhause")]
+    assert household(conn) == [("Brot", "einkauf", 1, 1, "stk", 0), ("Milch", "vorrat", 1, 2, "stk", 0)]
+
+
+def test_haushalt_ohne_listen(old_db):
+    conn = old_db(
+        HAUSHALT_OHNE_LISTEN,
+        f"INSERT INTO household_items VALUES (1, 'mehl', 'Mehl', 'vorrat', 1.5, 'kg', '{T}', NULL)",
+        f"INSERT INTO household_items VALUES (2, 'mehl', 'Mehl', 'einkauf', 2, 'stk', '{T}', NULL)",
+    )
+    assert [r["name"] for r in conn.execute("SELECT name FROM shopping_lists")] == ["Zuhause"]
+    assert household(conn) == [("Mehl", "einkauf", 1, 2, "stk", 0), ("Mehl", "vorrat", 1, 1.5, "kg", 0)]
+
+
+def test_haushalt_zwischenstand(old_db):
+    conn = old_db(
+        *ZWISCHENSTAND,
+        f"INSERT INTO household_items VALUES (1, 'reis', 'Reis', 'vorrat', NULL, 1, 'stk', '{T}', NULL)",
+        f"INSERT INTO household_items VALUES (2, 'reis', 'Reis', 'einkauf', 1, 3, 'stk', '{T}', NULL)",
+    )
+    # "Einkaufsliste" heißt jetzt "Zuhause" und enthält auch den Vorrat
+    assert [tuple(r) for r in conn.execute("SELECT id, name FROM shopping_lists")] == [(1, "Zuhause")]
+    assert household(conn) == [("Reis", "einkauf", 1, 3, "stk", 0), ("Reis", "vorrat", 1, 1, "stk", 0)]
+    indexes = {r[0] for r in conn.execute("SELECT name FROM sqlite_master WHERE type = 'index'")}
+    assert not {"household_vorrat", "household_einkauf"} & indexes
+
+
+def test_kanban_ohne_erledigt_zeitpunkt(old_db):
+    conn = old_db(
+        KANBAN_PROJECTS,
+        KANBAN_TASKS_OHNE_DONE,
+        f"INSERT INTO kanban_projects VALUES (1, 'P', '', 1, NULL, '{T}', NULL, '{T}', NULL)",
+        f"INSERT INTO kanban_tasks VALUES (1, 1, 'fertig', '', 'erledigt', NULL, 2, 1, '{T}', NULL, '{T}', NULL)",
+        f"INSERT INTO kanban_tasks VALUES (2, 1, 'offen', '', 'offen', NULL, 2, 2, '{T}', NULL, '{T}', NULL)",
+    )
+    rows = dict(conn.execute("SELECT title, done_at FROM kanban_tasks").fetchall())
+    # Erledigte zählen ab dem Update – nicht ab dem alten Änderungsdatum (sonst sofort gelöscht)
+    assert rows["fertig"] > T and rows["offen"] is None
+
+
+def test_reisen_ohne_neue_spalten(old_db):
+    conn = old_db(
+        TRAVEL_ALT,
+        f"INSERT INTO travel_cities VALUES (1, 1, 2950159, 'Berlin', '', 'DE', 52.5, 13.4, NULL, '{T}')",
+    )
+    row = conn.execute("SELECT name, elevation, timezone, capital FROM travel_cities").fetchone()
+    assert tuple(row) == ("Berlin", None, None, None)
+
+
+def test_zweiter_start_aendert_nichts(old_db):
+    conn = old_db(
+        HAUSHALT_OHNE_LISTEN,
+        f"INSERT INTO household_items VALUES (1, 'mehl', 'Mehl', 'vorrat', 1, 'stk', '{T}', NULL)",
+    )
+    before = household(conn), [tuple(r) for r in conn.execute("SELECT * FROM shopping_lists")]
+    db.init()
+    assert (household(conn), [tuple(r) for r in conn.execute("SELECT * FROM shopping_lists")]) == before
+
+
+def test_geloeschte_listen_kommen_nicht_zurueck(conn):
+    with conn:
+        conn.execute("DELETE FROM shopping_lists")
+    db.init()
+    assert conn.execute("SELECT COUNT(*) FROM shopping_lists").fetchone()[0] == 0

backend/tests/test_reisen.py

@@ -0,0 +1,34 @@
+BERLIN = {"geonameId": 2950159, "name": "Berlin", "country": "DE", "lat": 52.52, "lon": 13.41, "population": 3426354, "capital": True}
+LEIDEN = {"geonameId": 2751773, "name": "Leiden", "country": "NL", "lat": 52.16, "lon": 4.49}
+
+
+def test_staedte_anderer_nur_lesend(login):
+    anna, ben = login("anna"), login("ben")
+    anna.post("/api/reisen/staedte", json=BERLIN)
+    data = ben.get("/api/reisen").json()
+    assert data["cities"] == []
+    assert [(p["name"], [c["name"] for c in p["cities"]]) for p in data["others"]] == [("Anna", ["Berlin"])]
+    city_id = data["others"][0]["cities"][0]["id"]
+    assert ben.delete(f"/api/reisen/staedte/{city_id}").status_code == 404
+    assert anna.get("/api/reisen").json()["others"] == []
+
+
+def test_hauptstadt_kennzeichen(login):
+    anna = login("anna")
+    anna.post("/api/reisen/staedte", json=BERLIN)
+    data = anna.post("/api/reisen/staedte", json=LEIDEN).json()
+    # Mit Angabe aus der Suche gespeichert, ohne Angabe "unbekannt" (wird im Hintergrund nachgetragen)
+    assert {c["name"]: c["capital"] for c in data["cities"]} == {"Berlin": True, "Leiden": None}
+
+
+def test_doppelte_stadt_wird_ignoriert(login):
+    anna = login("anna")
+    anna.post("/api/reisen/staedte", json=BERLIN)
+    assert len(anna.post("/api/reisen/staedte", json=BERLIN).json()["cities"]) == 1
+
+
+def test_land_markieren(login):
+    anna = login("anna")
+    assert anna.put("/api/reisen/laender/IS").json()["countries"] == ["IS"]
+    assert anna.delete("/api/reisen/laender/IS").json()["countries"] == []
+    assert anna.put("/api/reisen/laender/xx").status_code == 400