feat: Add synopisis core loop (#166)

Co-authored-by: Michael Neale <michael.neale@gmail.com>

tests/synopsis/test_process_management.py

@@ -0,0 +1,62 @@
+import pytest
+import time
+import requests
+from goose.synopsis.toolkit import SynopsisDeveloper
+from goose.synopsis.system import system
+
+
+class MockNotifier:
+    def log(self, message):
+        pass
+
+    def status(self, message):
+        pass
+
+
+@pytest.fixture
+def toolkit(tmpdir):
+    original_cwd = system.cwd
+    system.cwd = str(tmpdir)
+    notifier = MockNotifier()
+    toolkit = SynopsisDeveloper(notifier=notifier)
+
+    yield toolkit
+
+    # Teardown: cancel all processes and restore original working directory
+    for process_id in list(system._processes.keys()):
+        system.cancel_process(process_id)
+    system.cwd = original_cwd
+
+
+def test_start_process(toolkit):
+    process_id = toolkit.start_process("python -m http.server 8000")
+    assert process_id > 0
+    time.sleep(2)  # Give the server time to start
+
+    # Check if the server is running
+    try:
+        response = requests.get("http://localhost:8000")
+        assert response.status_code == 200
+    except requests.ConnectionError:
+        pytest.fail("HTTP server did not start successfully")
+    output = toolkit.view_process_output(process_id)
+    assert "200" in output
+
+
+def test_list_processes(toolkit):
+    process_id = toolkit.start_process("python -m http.server 8001")
+    processes = toolkit.list_processes()
+    assert process_id in processes
+    assert "python -m http.server 8001" in processes[process_id]
+
+
+def test_cancel_process(toolkit):
+    process_id = toolkit.start_process("python -m http.server 8003")
+    time.sleep(2)  # Give the server time to start
+
+    result = toolkit.cancel_process(process_id)
+    assert result == f"process {process_id} cancelled"
+
+    # Verify that the process is no longer running
+    with pytest.raises(ValueError):
+        toolkit.view_process_output(process_id)