tests: add test for guild pruning

tests/test_guild.py

@@ -17,9 +17,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 import secrets
+import datetime
 
 import pytest
 
+from litecord.common.guilds import add_member
+
 
 @pytest.mark.asyncio
 async def test_guild_create(test_cli_user):
@@ -102,3 +105,48 @@ async def test_guild_nickname(test_cli_user):
 
     assert fetched_guild["id"] == str(guild.id)
     assert fetched_guild["members"][0]["nick"] == NEW_NICKNAME
+
+
+async def test_prune_guild(test_cli_user):
+    guild = await test_cli_user.create_guild()
+    user = await test_cli_user.create_user()
+    async with test_cli_user.app.app_context():
+        await add_member(guild.id, user.id)
+
+    # assert setup went well
+    added_member_guild = await guild.refetch()
+    assert added_member_guild.member_count == 2
+
+    resp = await test_cli_user.get(
+        f"/api/v6/guilds/{guild.id}/prune", query_string={"days": 7}
+    )
+    assert resp.status_code == 200
+    rjson = await resp.json
+    assert rjson["pruned"] == 0
+
+    # set joined_at to the beginning of the universe
+    await test_cli_user.app.db.execute(
+        "UPDATE users SET last_session = $1 WHERE id = $2",
+        datetime.datetime(year=2010, month=1, day=1),
+        user.id,
+    )
+
+    # execute compute prune, must return 1
+    resp = await test_cli_user.get(
+        f"/api/v6/guilds/{guild.id}/prune", query_string={"days": 7}
+    )
+    assert resp.status_code == 200
+    rjson = await resp.json
+    assert rjson["pruned"] == 1
+
+    # execute prune, member count should go to 1
+    resp = await test_cli_user.post(
+        f"/api/v6/guilds/{guild.id}/prune",
+        query_string={"days": 7},
+    )
+    assert resp.status_code == 200
+    rjson = await resp.json
+    assert rjson["pruned"] == 1
+
+    pruned_member_guild = await guild.refetch()
+    assert pruned_member_guild.member_count == 1