test cases: Add fixture for ACL-enabled test server

This uses the real plug-ins to test the broker correctly responds to the
return values when publishing and subscribing.

The plug-ins themselves are tested elsewhere.

tests/conftest.py

@@ -1,4 +1,5 @@
 import unittest.mock
+import os.path
 
 import pytest
 
@@ -15,6 +16,39 @@ test_config = {
 }
 
 
+test_config_acl = {
+    "listeners": {
+        "default": {"type": "tcp", "bind": "127.0.0.1:1884", "max_connections": 10},
+    },
+    "sys_interval": 0,
+    "auth": {
+        "plugins": ["auth_file"],
+        "password-file": os.path.join(
+            os.path.dirname(os.path.realpath(__file__)),
+            'plugins',
+            'passwd'
+        )
+    },
+    "topic-check": {
+        "enabled": True,
+        "plugins": ["topic_acl"],
+        "acl": {
+            "user1": [
+                "public/#"
+            ],
+            "user2": [
+                "#"
+            ],
+        },
+        "publish-acl": {
+            "user1": [
+                "public/subtopic/#"
+            ]
+        },
+    }
+}
+
+
 @pytest.fixture(scope="function")
 def mock_plugin_manager():
     with unittest.mock.patch("amqtt.broker.PluginManager") as plugin_manager:
@@ -36,3 +70,17 @@ async def broker(mock_plugin_manager):
 
     if not broker.transitions.is_stopped():
         await broker.shutdown()
+
+
+@pytest.fixture(scope="function")
+async def acl_broker():
+    broker = amqtt.broker.Broker(test_config_acl, plugin_namespace="amqtt.broker.plugins")
+    await broker.start()
+    assert broker.transitions.is_started()
+    assert broker._sessions == {}
+    assert "default" in broker._servers
+
+    yield broker
+
+    if not broker.transitions.is_stopped():
+        await broker.shutdown()