Include mysql-test-app in the tests

tests/integration/test_architecture.py

@@ -2,25 +2,42 @@
 # Copyright 2024 Canonical Ltd.
 # See LICENSE file for licensing details.
 
+import asyncio
+
 import pytest
 from pytest_operator.plugin import OpsTest
 
 from .helpers import get_charm
 
 MYSQL_ROUTER_APP_NAME = "mysql-router"
+MYSQL_TEST_APP_NAME = "mysql-test-app"
 
 
 @pytest.mark.group(1)
 @pytest.mark.usefixtures("only_amd64")
-async def test_arm_charm_on_amd_host(ops_test: OpsTest) -> None:
+async def test_arm_charm_on_amd_host(ops_test: OpsTest, mysql_router_charm_series: str) -> None:
     """Tries deploying an arm64 charm on amd64 host."""
     charm = await get_charm(".", "arm64", 2)
 
-    await ops_test.model.deploy(
-        charm,
-        application_name=MYSQL_ROUTER_APP_NAME,
-        num_units=0,
-        base="[email protected]",
+    await asyncio.gather(
+        ops_test.model.deploy(
+            charm,
+            application_name=MYSQL_ROUTER_APP_NAME,
+            num_units=0,
+            series=mysql_router_charm_series,
+        ),
+        ops_test.model.deploy(
+            MYSQL_TEST_APP_NAME,
+            application_name=MYSQL_TEST_APP_NAME,
+            num_units=1,
+            channel="latest/edge",
+            series=mysql_router_charm_series,
+        ),
+    )
+
+    await ops_test.model.relate(
+        f"{MYSQL_ROUTER_APP_NAME}:database",
+        f"{MYSQL_TEST_APP_NAME}:database",
     )
 
     await ops_test.model.wait_for_idle(
@@ -32,15 +49,29 @@ async def test_arm_charm_on_amd_host(ops_test: OpsTest) -> None:
 
 @pytest.mark.group(1)
 @pytest.mark.usefixtures("only_arm64")
-async def test_amd_charm_on_arm_host(ops_test: OpsTest) -> None:
+async def test_amd_charm_on_arm_host(ops_test: OpsTest, mysql_router_charm_series: str) -> None:
     """Tries deploying an amd64 charm on arm64 host."""
     charm = await get_charm(".", "amd64", 1)
 
-    await ops_test.model.deploy(
-        charm,
-        application_name=MYSQL_ROUTER_APP_NAME,
-        num_units=0,
-        base="[email protected]",
+    await asyncio.gather(
+        ops_test.model.deploy(
+            charm,
+            application_name=MYSQL_ROUTER_APP_NAME,
+            num_units=0,
+            series=mysql_router_charm_series,
+        ),
+        ops_test.model.deploy(
+            MYSQL_TEST_APP_NAME,
+            application_name=MYSQL_TEST_APP_NAME,
+            num_units=1,
+            channel="latest/edge",
+            series=mysql_router_charm_series,
+        ),
+    )
+
+    await ops_test.model.relate(
+        f"{MYSQL_ROUTER_APP_NAME}:database",
+        f"{MYSQL_TEST_APP_NAME}:database",
     )
 
     await ops_test.model.wait_for_idle(