OCT-1862: Cover /check in delegation with API Tests

backend/tests/api-e2e/test_api_delegation.py

@@ -59,5 +59,37 @@ def test_delegation(client: Client, payload: ScoreDelegationPayload):
 
 
 @pytest.mark.api
-def test_check_in_delegation():
-    pass
+def test_check_delegation(client: Client, payload: ScoreDelegationPayload):
+    client.move_to_next_epoch(STARTING_EPOCH + 1)
+    client.move_to_next_epoch(STARTING_EPOCH + 2)
+    client.move_to_next_epoch(STARTING_EPOCH + 3)
+
+    epoch_no = client.wait_for_sync(STARTING_EPOCH + 3)
+    app.logger.debug(f"indexed epoch: {epoch_no}")
+
+    database.user.add_user(USER1_ADDRESS)
+    database.user.add_user(USER2_ADDRESS)
+
+    # check if invalid request is handled correctly
+    addresses = [payload.primary_addr] * 12
+    _, status = client.check_delegation(*addresses)
+    assert status == 400
+
+    # check that obfuscated delegation does not exist
+    _, status = client.check_delegation(payload.primary_addr, payload.secondary_addr)
+    assert status == 400
+
+    # conduct a delegation
+    _, status = client.delegate(
+        primary_address=payload.primary_addr,
+        secondary_address=payload.secondary_addr,
+        primary_address_signature=payload.primary_addr_signature,
+        secondary_address_signature=payload.secondary_addr_signature,
+    )
+    assert status == 201
+
+    # check if given addresses are used for delegation
+    resp, status = client.check_delegation(payload.primary_addr, payload.secondary_addr)
+    assert status == 200
+    assert resp["primary"] == payload.primary_addr
+    assert resp["secondary"] == payload.secondary_addr

backend/tests/conftest.py

@@ -933,6 +933,11 @@ def get_healthcheck(self) -> tuple[dict, int]:
         rv = self._flask_client.get("/info/healthcheck")
         return json.loads(rv.text), rv.status_code
 
+    def check_delegation(self, *addresses) -> tuple[dict, int]:
+        addresses = ",".join(addresses)
+        rv = self._flask_client.get(f"/delegation/check/{addresses}")
+        return json.loads(rv.text), rv.status_code
+
     def delegate(
         self,
         primary_address: str,