test_backend_server.py
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"""U-007 tests: backend process start/stop, c_pick_folder route (osascript
mocked at the subprocess boundary), and the zero-third-party-dependency
constraint (05 §5.7) checked statically via AST, not just trusted.
Run: python3 -m unittest src.test_backend_server -v
"""
import ast
import http.client
import json
import os
import shutil
import subprocess
import sys
import tempfile
import threading
import unittest
from unittest.mock import patch
from src import backend_server
class ServerStartStopTest(unittest.TestCase):
def test_can_start_serve_and_stop(self):
# deliberately hits an unrelated route, not /api/system/pick-folder --
# that one would pop a real, unmocked osascript dialog on this machine
# and hang waiting for a human who isn't there.
server = backend_server.create_server(db_path=":memory:")
thread = threading.Thread(target=server.serve_forever, daemon=True)
thread.start()
try:
host, port = server.server_address
conn = http.client.HTTPConnection(host, port, timeout=5)
conn.request("POST", "/api/does-not-exist", body=b"{}")
resp = conn.getresponse()
resp.read()
conn.close()
self.assertEqual(resp.status, 404)
finally:
server.shutdown()
server.server_close()
thread.join(timeout=5)
self.assertFalse(thread.is_alive())
def test_unknown_route_returns_404(self):
server = backend_server.create_server(db_path=":memory:")
thread = threading.Thread(target=server.serve_forever, daemon=True)
thread.start()
try:
host, port = server.server_address
conn = http.client.HTTPConnection(host, port, timeout=5)
conn.request("POST", "/api/does-not-exist")
resp = conn.getresponse()
body = json.loads(resp.read())
conn.close()
self.assertEqual(resp.status, 404)
self.assertEqual(body["error"], "NOT_FOUND")
finally:
server.shutdown()
server.server_close()
thread.join(timeout=5)
class StaticFileServingTest(unittest.TestCase):
"""U-008: frontend shell served as static files. Actual client-side
routing behavior was verified in a real browser this session (nav
highlighting + content swap across all 3 routes, no page reload) --
that's not something a stdlib-only test can exercise without a JS
engine, so this only covers what the server is responsible for."""
def setUp(self):
self.server = backend_server.create_server(db_path=":memory:")
self.thread = threading.Thread(target=self.server.serve_forever, daemon=True)
self.thread.start()
def tearDown(self):
self.server.shutdown()
self.server.server_close()
self.thread.join(timeout=5)
def _get(self, path):
host, port = self.server.server_address
conn = http.client.HTTPConnection(host, port, timeout=5)
conn.request("GET", path)
resp = conn.getresponse()
body = resp.read()
content_type = resp.getheader("Content-Type")
conn.close()
return resp.status, content_type, body
def test_root_serves_index_html(self):
status, content_type, body = self._get("/")
self.assertEqual(status, 200)
self.assertIn("text/html", content_type)
self.assertIn(b"<main id=\"app\">", body)
self.assertIn(b'href="#/tasks"', body)
def test_app_js_served_with_js_content_type(self):
status, content_type, body = self._get("/app.js")
self.assertEqual(status, 200)
self.assertIn("javascript", content_type)
self.assertIn(b"hashchange", body)
self.assertIn(b'"#/tasks"', body)
self.assertIn(b'"#/settings"', body)
def test_style_css_served_with_css_content_type(self):
status, content_type, body = self._get("/style.css")
self.assertEqual(status, 200)
self.assertIn("text/css", content_type)
def test_unknown_get_path_returns_404(self):
status, _, body = self._get("/nope")
self.assertEqual(status, 404)
self.assertEqual(json.loads(body)["error"], "NOT_FOUND")
class PickFolderTest(unittest.TestCase):
def test_success_returns_selected_path(self):
with patch("src.backend_server.platform.system", return_value="Darwin"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["osascript"], returncode=0, stdout="/Users/x/some-project\n", stderr=""
)
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": "/Users/x/some-project"})
def test_user_cancel_returns_null_path_not_an_error(self):
with patch("src.backend_server.platform.system", return_value="Darwin"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["osascript"], returncode=1, stdout="",
stderr="execution error: User canceled. (-128)",
)
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": None})
def test_osascript_failure_other_than_cancel_raises_dialog_unavailable(self):
with patch("src.backend_server.platform.system", return_value="Darwin"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["osascript"], returncode=1, stdout="", stderr="some other AppleScript error",
)
with self.assertRaises(backend_server.DialogUnavailableError):
backend_server.pick_folder()
def test_windows_success_returns_selected_path(self):
with patch("src.backend_server.platform.system", return_value="Windows"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["powershell"], returncode=0, stdout="C:\\Users\\x\\some-project\r\n", stderr=""
)
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": "C:\\Users\\x\\some-project"})
def test_windows_user_cancel_returns_null_path(self):
with patch("src.backend_server.platform.system", return_value="Windows"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["powershell"], returncode=0, stdout="", stderr=""
)
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": None})
def test_windows_missing_powershell_raises_dialog_unavailable(self):
with patch("src.backend_server.platform.system", return_value="Windows"), \
patch("src.backend_server.subprocess.run", side_effect=FileNotFoundError("no powershell")):
with self.assertRaises(backend_server.DialogUnavailableError):
backend_server.pick_folder()
def test_linux_zenity_success_returns_selected_path(self):
with patch("src.backend_server.platform.system", return_value="Linux"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["zenity"], returncode=0, stdout="/home/x/some-project\n", stderr=""
)
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": "/home/x/some-project"})
run.assert_called_once()
self.assertEqual(run.call_args[0][0][0], "zenity")
def test_linux_zenity_cancel_returns_null_path(self):
with patch("src.backend_server.platform.system", return_value="Linux"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["zenity"], returncode=1, stdout="", stderr=""
)
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": None})
def test_linux_falls_back_to_kdialog_when_zenity_missing(self):
with patch("src.backend_server.platform.system", return_value="Linux"), \
patch("src.backend_server.subprocess.run") as run:
run.side_effect = [
FileNotFoundError("no zenity"),
subprocess.CompletedProcess(args=["kdialog"], returncode=0, stdout="/home/x/proj\n", stderr=""),
]
result = backend_server.pick_folder()
self.assertEqual(result, {"selected_path": "/home/x/proj"})
self.assertEqual(run.call_count, 2)
def test_linux_neither_zenity_nor_kdialog_raises_dialog_unavailable(self):
with patch("src.backend_server.platform.system", return_value="Linux"), \
patch("src.backend_server.subprocess.run", side_effect=FileNotFoundError("not found")):
with self.assertRaises(backend_server.DialogUnavailableError):
backend_server.pick_folder()
class PickFolderRouteTest(unittest.TestCase):
def setUp(self):
self.server = backend_server.create_server(db_path=":memory:")
self.thread = threading.Thread(target=self.server.serve_forever, daemon=True)
self.thread.start()
def tearDown(self):
self.server.shutdown()
self.server.server_close()
self.thread.join(timeout=5)
def _post(self, path):
host, port = self.server.server_address
conn = http.client.HTTPConnection(host, port, timeout=5)
conn.request("POST", path, body=b"{}")
resp = conn.getresponse()
body = json.loads(resp.read())
conn.close()
return resp.status, body
def test_route_returns_selected_path_on_success(self):
with patch("src.backend_server.platform.system", return_value="Darwin"), \
patch("src.backend_server.subprocess.run") as run:
run.return_value = subprocess.CompletedProcess(
args=["osascript"], returncode=0, stdout="/tmp/chosen\n", stderr=""
)
status, body = self._post("/api/system/pick-folder")
self.assertEqual(status, 200)
self.assertEqual(body, {"selected_path": "/tmp/chosen"})
def test_route_returns_422_dialog_unavailable_when_no_dialog_tool_present(self):
with patch("src.backend_server.platform.system", return_value="Linux"), \
patch("src.backend_server.subprocess.run", side_effect=FileNotFoundError("not found")):
status, body = self._post("/api/system/pick-folder")
self.assertEqual(status, 422)
self.assertEqual(body["error"], "DIALOG_UNAVAILABLE")
class ProjectCreateRouteTest(unittest.TestCase):
"""c_project_create (03-C §3.0) wired to a real HTTP route for the first
time in U-022 -- project_scaffold.create_project() itself was already
fully implemented and tested in U-002, so this only exercises the
request/response/error-code plumbing, not the scaffolding logic again."""
def setUp(self):
self.tmp = tempfile.TemporaryDirectory()
self.addCleanup(self.tmp.cleanup)
subprocess.run(["git", "init"], cwd=self.tmp.name, check=True, capture_output=True)
self.server = backend_server.create_server(db_path=":memory:")
self.thread = threading.Thread(target=self.server.serve_forever, daemon=True)
self.thread.start()
def tearDown(self):
self.server.shutdown()
self.server.server_close()
self.thread.join(timeout=5)
def _post(self, path, payload):
host, port = self.server.server_address
conn = http.client.HTTPConnection(host, port, timeout=5)
conn.request("POST", path, body=json.dumps(payload).encode("utf-8"))
resp = conn.getresponse()
body = json.loads(resp.read())
conn.close()
return resp.status, body
def test_creates_project_for_existing_git_repo(self):
status, body = self._post("/api/projects", {"target_folder_path": self.tmp.name})
self.assertEqual(status, 200)
self.assertTrue(body["has_git_repo"])
self.assertTrue(body["graphlemon_subdir_initialized"])
self.assertTrue(os.path.isdir(os.path.join(self.tmp.name, ".graphlemon")))
def test_repeat_call_is_idempotent(self):
status1, body1 = self._post("/api/projects", {"target_folder_path": self.tmp.name})
status2, body2 = self._post("/api/projects", {"target_folder_path": self.tmp.name})
self.assertEqual(status1, 200)
self.assertEqual(status2, 200)
self.assertEqual(body1["project_id"], body2["project_id"])
def test_missing_target_folder_path_returns_400(self):
status, body = self._post("/api/projects", {})
self.assertEqual(status, 400)
self.assertEqual(body["error"], "INVALID_INPUT")
def test_nonexistent_path_returns_404(self):
status, body = self._post("/api/projects", {"target_folder_path": "/no/such/path/at/all"})
self.assertEqual(status, 404)
self.assertEqual(body["error"], "PATH_NOT_FOUND")
def test_non_git_folder_without_confirmation_returns_409(self):
non_git = tempfile.mkdtemp()
self.addCleanup(lambda: shutil.rmtree(non_git, ignore_errors=True))
status, body = self._post("/api/projects", {"target_folder_path": non_git})
self.assertEqual(status, 409)
self.assertEqual(body["error"], "GIT_INIT_DECLINED")
def test_non_git_folder_with_confirmation_initializes_git(self):
non_git = tempfile.mkdtemp()
self.addCleanup(lambda: shutil.rmtree(non_git, ignore_errors=True))
status, body = self._post(
"/api/projects", {"target_folder_path": non_git, "init_git_if_missing": True}
)
self.assertEqual(status, 200)
self.assertTrue(body["has_git_repo"])
self.assertTrue(os.path.isdir(os.path.join(non_git, ".git")))
class TaskAndBugReportRouteTest(unittest.TestCase):
"""U-023: c_task_create (03-C §3.1) + c_bug_report_create (03-C §3.1.1)
wired to real HTTP routes for v_goal_composer/v_bug_feedback."""
def setUp(self):
self.server = backend_server.create_server(db_path=":memory:")
self.thread = threading.Thread(target=self.server.serve_forever, daemon=True)
self.thread.start()
self.server.conn.execute(
"INSERT INTO project (project_id, name, target_folder_path, has_git_repo, status) "
"VALUES ('proj-1', 'P', '/tmp/proj-1', 1, 'active')"
)
self.server.conn.commit()
def tearDown(self):
self.server.shutdown()
self.server.server_close()
self.thread.join(timeout=5)
def _post(self, path, payload):
host, port = self.server.server_address
conn = http.client.HTTPConnection(host, port, timeout=5)
conn.request("POST", path, body=json.dumps(payload).encode("utf-8"))
resp = conn.getresponse()
body = json.loads(resp.read())
conn.close()
return resp.status, body
def test_creates_task(self):
status, body = self._post(
"/api/tasks", {"project_id": "proj-1", "goal_text": "make a snake game", "created_via": "human_console"}
)
self.assertEqual(status, 200)
self.assertEqual(body["status"], "queued")
self.assertIn("task_id", body)
def test_empty_goal_text_returns_400(self):
status, body = self._post("/api/tasks", {"project_id": "proj-1", "goal_text": ""})
self.assertEqual(status, 400)
self.assertEqual(body["error"], "INVALID_PARAM")
def test_nonexistent_project_id_returns_400(self):
status, body = self._post("/api/tasks", {"project_id": "no-such-project", "goal_text": "x"})
self.assertEqual(status, 400)
self.assertEqual(body["error"], "INVALID_PARAM")
def test_creates_bug_report(self):
status, body = self._post(
"/api/bug-reports", {"project_id": "proj-1", "description": "snake clips through walls"}
)
self.assertEqual(status, 200)
self.assertEqual(body["status"], "open")
self.assertIn("bug_id", body)
def test_bug_report_with_related_task_id(self):
_, task_body = self._post("/api/tasks", {"project_id": "proj-1", "goal_text": "x"})
status, body = self._post(
"/api/bug-reports",
{"project_id": "proj-1", "description": "x", "related_task_id": task_body["task_id"]},
)
self.assertEqual(status, 200)
def test_empty_description_returns_400(self):
status, body = self._post("/api/bug-reports", {"project_id": "proj-1", "description": ""})
self.assertEqual(status, 400)
self.assertEqual(body["error"], "INVALID_PARAM")
def test_bug_report_with_bad_project_id_returns_400_not_500(self):
# a raw sqlite3.IntegrityError propagating uncaught here was a real
# bug this smoke test caught (stale/bad project_id crashed the
# request instead of a clean 400)
status, body = self._post("/api/bug-reports", {"project_id": "no-such-project", "description": "x"})
self.assertEqual(status, 400)
self.assertEqual(body["error"], "INVALID_PARAM")
class ZeroThirdPartyDependencyTest(unittest.TestCase):
"""05 §5.7: no Flask/FastAPI/Express/Node.js -- checked statically so this
doesn't silently rot if someone adds an import later."""
def test_backend_server_only_imports_stdlib(self):
path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "backend_server.py")
with open(path, encoding="utf-8") as f:
tree = ast.parse(f.read(), filename=path)
top_level_names = set()
for node in ast.walk(tree):
if isinstance(node, ast.Import):
for alias in node.names:
top_level_names.add(alias.name.split(".")[0])
elif isinstance(node, ast.ImportFrom) and node.module and node.level == 0:
top_level_names.add(node.module.split(".")[0])
self.assertTrue(top_level_names, "expected at least one import to check")
# "src" is graphlemon's own package (e.g. project_scaffold/schema/paths,
# wired in U-022) -- not a third-party dependency, so it's allowed;
# everything else must be in the standard library.
non_stdlib = {name for name in top_level_names if name not in sys.stdlib_module_names and name != "src"}
self.assertEqual(non_stdlib, set(), "non-stdlib imports found: {}".format(non_stdlib))
if __name__ == "__main__":
unittest.main()