Consider improvements for `tests/test_handling_keyboard_interupt.py`

[reactive-firewall]

Consider this improvement:

	"""
	Test proper handling of keyboard interrupts (SIGINT).

	This test:
		1. Starts a multicast server with coverage tracking
		2. Waits for server initialization
		3. Sends a SIGINT signal to simulate Ctrl+C
		4. Verifies that the server exits with the expected status code

	Success criteria:
		- Server must exit with status code 130 (standard SIGINT exit code)
		- Server must not exit with status code 2 (invalid arguments)
	"""

Originally posted by @reactive-firewall in #251 (comment)

[reactive-firewall]

Consider improving the constants with comments and type-hinting.

Originally posted by @reactive-firewall in #251 (comment)

[reactive-firewall]

Also:

For consistency with other test modules, add a module-level docstring.

+"""
+Test module for verifying keyboard interrupt handling in multicast operations.
+
+This module contains test suites that verify proper handling of SIGINT signals,
+ensuring clean shutdown and resource cleanup during keyboard interrupts.
+"""

[reactive-firewall]

Enhance constant documentation with rationale.

Add more detailed documentation for the configuration constants to explain their purpose and any constraints.

-    # Constants for test configuration
-    STARTUP_DELAY_SECONDS = 1  # Allow server to start
-    PROCESS_TIMEOUT_SECONDS = 5
-    EXPECTED_SIGINT_EXIT_CODE = 130
-    INVALID_ARGS_EXIT_CODE = 2
+    # Test configuration constants
+
+    # Time to wait for server initialization before sending SIGINT
+    # Must be > 0 to ensure server is ready
+    STARTUP_DELAY_SECONDS = 1
+
+    # Maximum time to wait for process completion after SIGINT
+    # Should be sufficient for cleanup but not too long
+    PROCESS_TIMEOUT_SECONDS = 5
+
+    # Expected exit code when process receives SIGINT
+    # 130 = 128 + SIGINT(2) as per POSIX convention
+    EXPECTED_SIGINT_EXIT_CODE = 130
+
+    # Exit code indicating invalid command-line arguments
+    INVALID_ARGS_EXIT_CODE = 2

---

Extract multicast configuration to constants.

Move the hardcoded multicast group address and command arguments to class constants for better maintainability.

 class TestHearKeyboardInterrupt(BasicUsageTestSuite):
+    # Standard multicast group address for testing
+    TEST_MULTICAST_GROUP = "224.0.0.1"
+
+    # Coverage command template for test execution
+    COVERAGE_CMD_TEMPLATE = "{} -m coverage run -p --context=Integration"

and

-            _fixture_cmd = str("{} -m coverage run -p --context=Integration").format(sys.executable)
+            _fixture_cmd = str(self.COVERAGE_CMD_TEMPLATE).format(sys.executable)
-                """--group""", """224.0.0.1"""
+                """--group""", self.TEST_MULTICAST_GROUP

[reactive-firewall]

@coderabbitai, please consolidate and update the refactoring mentioned in this GHI #255, of-course following all relevant project conventions and style.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Check if the file exists and display its content
cat tests/test_handling_keyboard_interupt.py

Length of output: 119

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🏁 Script executed:

#!/bin/bash
# Search for files with similar names
fd keyboard tests/
fd interupt tests/
fd interrupt tests/

Length of output: 63

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🏁 Script executed:

#!/bin/bash
# List all files in the tests directory
ls -la tests/

# Check if there's any file with similar name in the entire repository
find . -type f -name "*keyboard*" -o -name "*interrupt*" -o -name "*interupt*"

# Get information about PR #251
gh pr view 251 --json title,body,state

Length of output: 2371

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🏁 Script executed:

#!/bin/bash
# Get the content of the correct file
cat tests/test_hear_keyboard_interrupt.py

Length of output: 4047

---

@reactive-firewall I've analyzed the file and can provide a complete refactoring solution that consolidates all the improvements mentioned in issue #255. Here's the updated code for tests/test_hear_keyboard_interrupt.py:

#! /usr/bin/env python
# -*- coding: utf-8 -*-

# Multicast Python Module (Testing)
# ..................................
# Copyright (c) 2017-2025, Mr. Walls
# ..................................
# Licensed under MIT (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# ..........................................
# https://www.github.com/reactive-firewall/multicast/LICENSE.md
# ..........................................
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""
Test module for verifying keyboard interrupt handling in multicast operations.

This module contains test suites that verify proper handling of SIGINT signals,
ensuring clean shutdown and resource cleanup during keyboard interrupts.
"""

__module__ = """tests"""

try:
	"""Handle imports with CWE-758 mitigation.

	This implementation uses a nested try-except pattern to:
	1. Attempt direct context import
	2. Fallback to relative import
	3. Validate context module integrity
	4. Import required dependencies

	References:
	- CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
	"""
	try:
		import context
	except Exception as ImportErr:  # pragma: no branch
		ImportErr = None
		del ImportErr  # skipcq - cleanup any error leaks early
		from . import context
	if context.__name__ is None:
		raise ImportError("[CWE-758] Failed to import context") from None
	else:
		from context import sys
		from context import unittest
		from context import subprocess
		import signal
		import time
		from typing import List, Optional, Union, Tuple
		from context import BasicUsageTestSuite
except Exception as _cause:  # pragma: no branch
	raise ImportError("[CWE-758] Failed to import test context") from _cause


class TestHearKeyboardInterrupt(BasicUsageTestSuite):
	"""
	Test suite for verifying keyboard interrupt (SIGINT) handling.

	This suite ensures that the multicast service properly handles
	SIGINT signals by cleaning up resources and exiting gracefully
	with the expected status code (130).
	"""
	__module__ = """tests.test_hear_keyboard_interrupt"""

	# Test configuration constants

	# Time to wait for server initialization before sending SIGINT
	# Must be > 0 to ensure server is ready
	STARTUP_DELAY_SECONDS: int = 1

	# Maximum time to wait for process completion after SIGINT
	# Should be sufficient for cleanup but not too long
	PROCESS_TIMEOUT_SECONDS: int = 5

	# Expected exit code when process receives SIGINT
	# 130 = 128 + SIGINT(2) as per POSIX convention
	EXPECTED_SIGINT_EXIT_CODE: int = 130

	# Exit code indicating invalid command-line arguments
	INVALID_ARGS_EXIT_CODE: int = 2

	# Standard multicast group address for testing
	TEST_MULTICAST_GROUP: str = "224.0.0.1"

	# Coverage command template for test execution
	COVERAGE_CMD_TEMPLATE: str = "{} -m coverage run -p --context=Integration"

	def test_hear_keyboard_interrupt(self) -> None:
		"""
		Test proper handling of keyboard interrupts (SIGINT).

		This test:
			1. Starts a multicast server with coverage tracking
			2. Waits for server initialization
			3. Sends a SIGINT signal to simulate Ctrl+C
			4. Verifies that the server exits with the expected status code

		Success criteria:
			- Server must exit with status code 130 (standard SIGINT exit code)
			- Server must not exit with status code 2 (invalid arguments)
		"""
		theResult: bool = False
		fail_fixture: str = str("""C^INT --> HEAR == error""")
		_fixture_port_num: int = self._the_test_port
		try:
			self.assertIsNotNone(_fixture_port_num)
			self.assertEqual(type(_fixture_port_num), type(int(0)))
			_fixture_cmd: str = str(self.COVERAGE_CMD_TEMPLATE).format(sys.executable)
			_fixture_HEAR_args: List[str] = [
				_fixture_cmd,
				"""--source=multicast""",
				"""-m""",
				"""multicast""",
				"""--daemon""",
				"""HEAR""",
				"""--port""",
				str(_fixture_port_num),
				"""--group""",
				self.TEST_MULTICAST_GROUP
			]
			self.assertIsNotNone(_fixture_HEAR_args)
			process: subprocess.Popen = subprocess.Popen(
				context.checkCovCommand(*_fixture_HEAR_args),
				stdout=subprocess.PIPE,
				stderr=subprocess.PIPE,
				text=True
			)
			try:
				time.sleep(self.STARTUP_DELAY_SECONDS)
				process.send_signal(signal.SIGINT)
				stdout, stderr = process.communicate(timeout=self.PROCESS_TIMEOUT_SECONDS)
				self.assertIsNotNone(stdout, "Incomplete Test.")
				self.assertIsNotNone(stderr, "Incomplete Test.")
				self.assertIsNotNone(process.returncode, "Incomplete Test.")
				self.assertNotEqual(
					int(process.returncode),
					int(self.INVALID_ARGS_EXIT_CODE),
					"Invalid Test Arguments."
				)
				self.assertEqual(
					int(process.returncode),
					int(self.EXPECTED_SIGINT_EXIT_CODE),
					"CEP-8 VIOLATION."
				)
				theResult = (int(process.returncode) >= int(1))
			finally:
				process.kill()
		except Exception as err:
			context.debugtestError(err)
			self.fail(fail_fixture)
			theResult = False
		self.assertTrue(theResult, fail_fixture)


# leave this part
if __name__ == '__main__':
	unittest.main()

Key improvements made:

1. Added module-level docstring explaining the purpose of the test module
2. Enhanced constant documentation with detailed explanations and rationale
3. Extracted multicast configuration to class constants
4. Updated test method docstring with clear steps and success criteria
5. Added type hints throughout the code for better clarity and maintainability
6. Maintained the original functionality and test logic

[plan_code_changes]
Update the tests/test_hear_keyboard_interrupt.py file with the refactored code provided above.

---

🧠 Learnings used

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-12-06T00:59:20.586Z
Learning: The multicast project's Python modules should use type hints for better code clarity and maintainability, along with proper error handling and validation.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-12-12T20:51:15.319Z
Learning: In the multicast project, when refactoring shell scripts, prefer improving organization within a single file over splitting into multiple files, unless the benefits of modularity clearly outweigh the added complexity in security, permissions, and debugging.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-12T10:29:50.461Z
Learning: For future scripts, reactive-firewall prefers to use only POSIX built-ins (like `printf` instead of `echo`) to align with CEP-8 conventions.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-21T02:05:08.096Z
Learning: Reactive-firewall prefers to specify the full raw URL when fetching files from gists to ensure correct retrieval of content, particularly when the file is in markdown format.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-11-12T10:29:55.563Z
Learning: For future scripts, reactive-firewall prefers to keep the shebang line with an extra space (e.g., `#! /bin/bash`) as per project style.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#184
File: LICENSE.md:36-43
Timestamp: 2024-11-14T07:03:35.207Z
Learning: Reactive-firewall prefers that I verify URLs before suggesting changes, and avoid raising hypothetical issues without verification.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#235
File: .github/workflows/makefile-lint.yml:41-52
Timestamp: 2024-12-06T08:21:21.876Z
Learning: Reactive-firewall prefers to suppress errors in `apt-get install` commands when individual checks of the installed packages are performed afterwards, to allow for more granular error handling.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2024-12-13T01:44:13.412Z
Learning: In the multicast project's shell scripts, prefer organizing code into logical sections with clear comments (e.g., "=== Environment Setup ===") to maintain readability and maintainability while keeping related functions together.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#0
File: :0-0
Timestamp: 2025-03-12T01:53:57.758Z
Learning: In the multicast project, reactive-firewall has implemented a regression test for the "RECCOMENDED" typo in commit 4097176, showing their preferred approach to handling specific typo checking.

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#184
File: tests/check_pip:259-265
Timestamp: 2024-11-15T19:32:16.878Z
Learning: Reactive-firewall prefers that code changes adhere to SOLID design principles, specifically avoiding unnecessary complexity (AHA principle), maintaining the Single Responsibility Principle, and ensuring complex work is done on separate development branches (Open/Closed Principle).

---

Learnt from: reactive-firewall
PR: reactive-firewall/multicast#110
File: docs/USAGE.md:66-66
Timestamp: 2024-11-12T10:29:55.563Z
Learning: Reactive-firewall prefers to use "Caveat" as a heading instead of "Caution".