test: add fixture plugin and test for BatchCommitCommandEffect

Verifies that a plugin can import BatchCommitCommandEffect, construct
command instances with command_uuid, and produce the correct effect
payload through the RestrictedPython sandbox.

Author: beaugunderson

plugin_runner/tests/fixtures/plugins/test_batch_commit/CANVAS_MANIFEST.json

@@ -0,0 +1,29 @@
+{
+    "sdk_version": "0.1.4",
+    "plugin_version": "0.0.1",
+    "name": "test_batch_commit",
+    "description": "Test plugin for BatchCommitCommandEffect",
+    "components": {
+        "protocols": [
+            {
+                "class": "test_batch_commit.protocols.my_protocol:Protocol",
+                "description": "Returns a BatchCommitCommandEffect",
+                "data_access": {
+                    "event": "",
+                    "read": [],
+                    "write": []
+                }
+            }
+        ],
+        "commands": [],
+        "content": [],
+        "effects": [],
+        "views": []
+    },
+    "secrets": [],
+    "tags": {},
+    "references": [],
+    "license": "",
+    "diagram": false,
+    "readme": "./README.md"
+}

plugin_runner/tests/fixtures/plugins/test_batch_commit/__init__.py

@@ -0,0 +1,19 @@
+from canvas_sdk.commands import AssessCommand, PlanCommand
+from canvas_sdk.effects import Effect
+from canvas_sdk.effects.batch_commit import BatchCommitCommandEffect
+from canvas_sdk.events import EventType
+from canvas_sdk.protocols import BaseProtocol
+
+
+class Protocol(BaseProtocol):
+    """Test protocol that returns a BatchCommitCommandEffect."""
+
+    RESPONDS_TO = EventType.Name(EventType.UNKNOWN)
+
+    def compute(self) -> list[Effect]:
+        """Return a batch commit effect with two commands."""
+        commands = [
+            PlanCommand(command_uuid="cmd-001"),
+            AssessCommand(command_uuid="cmd-002"),
+        ]
+        return [BatchCommitCommandEffect(commands=commands).apply()]

plugin_runner/tests/fixtures/plugins/test_batch_commit/protocols/__init__.py

@@ -792,3 +792,32 @@ def test_payment_processor(
     ]
 
     assert result[0].effects == expected_effects
+
+
+@pytest.mark.parametrize("install_test_plugin", ["test_batch_commit"], indirect=True)
+def test_batch_commit_effect_through_plugin_runner(
+    install_test_plugin: Path,
+    plugin_runner: PluginRunner,
+    load_test_plugins: None,
+    db: None,
+) -> None:
+    """Test that a plugin can import and return a BatchCommitCommandEffect."""
+    result = list(plugin_runner.HandleEvent(EventRequest(type=EventType.UNKNOWN), None))
+
+    assert len(result) == 1
+    assert result[0].success is True
+    assert len(result[0].effects) == 1
+
+    effect = result[0].effects[0]
+    assert effect.type == EffectType.BATCH_COMMIT_COMMANDS
+
+    payload = json.loads(effect.payload)
+    assert len(payload["data"]["commands"]) == 2
+    assert payload["data"]["commands"][0] == {
+        "type": "COMMIT_PLAN_COMMAND",
+        "command": "cmd-001",
+    }
+    assert payload["data"]["commands"][1] == {
+        "type": "COMMIT_ASSESS_COMMAND",
+        "command": "cmd-002",
+    }