chore: add tests and upgrade version

[nakamasato]

what

• upgrade python to 3.12
• add tests

why

to improve maintainability

ref

• https://flask.palletsprojects.com/en/3.0.x/testing/

Detailed Check

• slack-gpt/tests/test_main.py

  Lines 44 to 74 in 695d6ca

  	def test_request_example(client):
  	signing_secret = "test_signing_secret"
  	os.environ["SIGNING_SECRET"] = signing_secret
  	timestamp = str(int(time.time()))
  	data = {
  	"type": "url_verification",
  	"challenge": "challenge",
  	}
  	signature = VERIFIER.generate_signature(timestamp=timestamp, body=json.dumps(data))
  	print(f"{signature=}, {json.dumps(data).encode()=}")
  	assert VERIFIER.is_valid(
  	body=json.dumps(data), timestamp=timestamp, signature=signature
  	)
  	headers = {
  	"X-Slack-Request-Timestamp": timestamp,
  	"X-Slack-Signature": signature,
  	"Content-Type": "application/json",
  	}
  	response = client.post(
  	"/slack/events",
  	data=json.dumps(data),
  	# json=data, # The Content-Type header will be set to application/json automatically.
  	headers=headers,
  	)
  	print(response)
  	assert hmac.compare_digest(
  	signature,
  	VERIFIER.generate_signature(timestamp=timestamp, body=json.dumps(data)),
  	)
  	assert VERIFIER.is_valid_request(body=json.dumps(data), headers=headers)
  	assert response.status_code == 200

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
slack_gpt
main.py	51	6	88%	42–43, 88–94, 111
TOTAL	51	6	88%

Tests	Skipped	Failures	Errors	Time
4	0 💤	0 ❌	0 🔥	3.208s ⏱️