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test: add dedupe conflicts error contracts #122

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CoderDeltaLAN merged 1 commit into from
Jun 20, 2026
Merged

test: add dedupe conflicts error contracts #122

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64 changes: 64 additions & 0 deletions tests/test_cli.py
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Original file line number Diff line number Diff line change
Expand Up @@ -236,6 +236,38 @@ def test_conflicts_returns_one_when_no_instruction_files_are_found(self) -> None
self.assertIn("Status: no_instruction_files", text)
self.assertIn("Conflict groups: 0", text)

def test_conflicts_returns_two_for_invalid_repository_root(self) -> None:
output = io.StringIO()

with redirect_stderr(output):
exit_code = main(["conflicts", str(FIXTURE_ROOT / "missing-repo")])

self.assertEqual(exit_code, 2)
self.assertEqual(
output.getvalue(),
"ERROR: repository root does not exist: "
f"{FIXTURE_ROOT / 'missing-repo'}\n",
)

def test_conflicts_returns_two_for_symlinked_instruction_file(self) -> None:
with tempfile.TemporaryDirectory() as tmp_dir:
root = Path(tmp_dir)
target = root / "REAL.md"
target.write_text("- Commit directly to main.\n", encoding="utf-8")
(root / "AGENTS.md").symlink_to(target)

output = io.StringIO()

with redirect_stderr(output):
exit_code = main(["conflicts", str(root)])

self.assertEqual(exit_code, 2)
self.assertEqual(
output.getvalue(),
"ERROR: instruction file path is a symlink and cannot be checked for "
"conflicts: AGENTS.md\n",
)

def test_dedupe_reports_duplicate_lines(self) -> None:
with tempfile.TemporaryDirectory() as tmp_dir:
root = Path(tmp_dir)
Expand Down Expand Up @@ -277,6 +309,38 @@ def test_dedupe_returns_one_when_no_instruction_files_are_found(self) -> None:
self.assertIn("Status: no_instruction_files", text)
self.assertIn("Duplicate groups: 0", text)

def test_dedupe_returns_two_for_invalid_repository_root(self) -> None:
output = io.StringIO()

with redirect_stderr(output):
exit_code = main(["dedupe", str(FIXTURE_ROOT / "missing-repo")])

self.assertEqual(exit_code, 2)
self.assertEqual(
output.getvalue(),
"ERROR: repository root does not exist: "
f"{FIXTURE_ROOT / 'missing-repo'}\n",
)

def test_dedupe_returns_two_for_symlinked_instruction_file(self) -> None:
with tempfile.TemporaryDirectory() as tmp_dir:
root = Path(tmp_dir)
target = root / "REAL.md"
target.write_text("Run unit tests before opening a pull request.\n", encoding="utf-8")
(root / "AGENTS.md").symlink_to(target)

output = io.StringIO()

with redirect_stderr(output):
exit_code = main(["dedupe", str(root)])

self.assertEqual(exit_code, 2)
self.assertEqual(
output.getvalue(),
"ERROR: instruction file path is a symlink and cannot be deduplicated: "
"AGENTS.md\n",
)

def test_explain_lists_known_rules(self) -> None:
output = io.StringIO()

Expand Down