test: add integration tests for one-shot token LD_PRELOAD library

[Copilot]

PR #604 introduced a one-shot token LD_PRELOAD library that prevents sensitive environment variables from being read multiple times, but lacked integration tests to verify the behavior and prevent regressions.

Tests Added

Container Mode (6 tests)

• Protected tokens (GITHUB_TOKEN, COPILOT_GITHUB_TOKEN, OPENAI_API_KEY) readable once, then cleared
• Non-sensitive variables unaffected by the library
• Programmatic access (Python os.getenv()) and shell access (printenv) both work

Chroot Mode (5 tests)

• Same protection mechanisms verified inside chroot environment
• Library correctly copied to /tmp/awf-lib/ and loaded via LD_PRELOAD

Edge Cases (3 tests)

• Empty values, nonexistent tokens, special characters handled correctly

Test Pattern

const testScript = `
  FIRST_READ=$(printenv GITHUB_TOKEN)
  SECOND_READ=$(printenv GITHUB_TOKEN)
  echo "First read: [$FIRST_READ]"
  echo "Second read: [$SECOND_READ]"
`;

const result = await runner.runWithSudo(testScript, {
  buildLocal: true,  // Required: library compiled during image build
  env: { GITHUB_TOKEN: 'ghp_test_token_12345' }
});

expect(result.stdout).toContain('First read: [ghp_test_token_12345]');
expect(result.stdout).toContain('Second read: []');  // Cleared

All tests require buildLocal: true since the library is compiled during Docker image build and may not exist in pre-built GHCR images.

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[Copilot]

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[Copilot]

Pull request overview

Adds a new integration test suite to validate the one-shot token LD_PRELOAD library introduced in PR #604, ensuring sensitive environment variables can only be read once (in both container and chroot execution modes) and guarding against regressions.

Changes:

• Added container-mode integration tests validating one-time reads for common token env vars and non-interference with normal env vars.
• Added chroot-mode integration tests validating the same behavior when the agent runs with --enable-chroot.
• Added edge-case tests for empty values, unset vars, and special characters.

Comments suppressed due to low confidence (1)

tests/integration/one-shot-tokens.test.ts:300

• Same quoting issue as the container-mode Python test: python3 -c '${pythonScript}' cannot safely embed a script that contains single quotes/newlines. This will cause the chroot-mode test to fail; use a quoting-safe way to pass the Python code to python3 (heredoc / stdin / proper escaping).

      const result = await runner.runWithSudo(
        `python3 -c '${pythonScript}'`,
        {

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[Copilot]

The comment "Empty token should be treated as no token" is misleading given the current one-shot-token implementation: an empty-but-set env var still results in getenv() returning a non-NULL pointer, so it will be treated as a first access and cleared (and will emit the access log). Consider rewording the comment to reflect that the value is empty but the one-shot logic still runs, or assert the intended behavior explicitly.

Suggested change

	// Empty token should be treated as no token
	// Empty token value should be returned as empty; one-shot logic still runs and clears it after the first access,
	// so both reads appear empty in the script output.

[Copilot]

python3 -c '${pythonScript}' will break because pythonScript contains single quotes (e.g. os.getenv('GITHUB_TOKEN', '')), so the shell will terminate the -c argument early and the test will fail. Pass the Python snippet without conflicting quoting (e.g., use a heredoc, base64, or wrap the -c payload in double-quotes with proper escaping).

This issue also appears on line 298 of the same file.

Suggested change

	`python3 -c '${pythonScript}'`,
	`python3 - << 'EOF'
	${pythonScript}
	EOF`,