| 1 | #!/usr/bin/env python3 |
| 2 | """Hermetic tests for scripts/measure-runtime-contract.py.""" |
| 3 | |
| 4 | from __future__ import annotations |
| 5 | |
| 6 | import importlib.util |
| 7 | import io |
| 8 | import json |
| 9 | import subprocess |
| 10 | import sys |
| 11 | import unittest |
| 12 | from contextlib import redirect_stdout |
| 13 | from pathlib import Path |
| 14 | from unittest import mock |
| 15 | |
| 16 | ROOT = Path(__file__).resolve().parents[1] |
| 17 | SCRIPT = ROOT / "scripts" / "measure-runtime-contract.py" |
| 18 | |
| 19 | SPEC = importlib.util.spec_from_file_location("measure_runtime_contract", SCRIPT) |
| 20 | assert SPEC and SPEC.loader |
| 21 | mod = importlib.util.module_from_spec(SPEC) |
| 22 | sys.modules[SPEC.name] = mod |
| 23 | SPEC.loader.exec_module(mod) |
| 24 | |
| 25 | |
| 26 | class RuntimeContractMeasurementTests(unittest.TestCase): |
| 27 | def test_metric_runner_targets_exact_library_test(self) -> None: |
| 28 | short_name = "print_mode_tool_catalog_metrics" |
| 29 | exact_name = f"core::engine::tests::{short_name}" |
| 30 | marker = "TOOL_CATALOG_METRICS " |
| 31 | payload = {"modes": {}, "surface_profile": "fixture"} |
| 32 | completed = subprocess.CompletedProcess( |
| 33 | args=[], |
| 34 | returncode=0, |
| 35 | stdout=( |
| 36 | "running 1 test\n" |
| 37 | f"test {exact_name} ... {marker}{json.dumps(payload)}\n" |
| 38 | "ok\n\n" |
| 39 | "test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; " |
| 40 | "0 filtered out\n" |
| 41 | ), |
| 42 | stderr="", |
| 43 | ) |
| 44 | |
| 45 | with mock.patch.object(mod.subprocess, "run", return_value=completed) as run: |
| 46 | measured = mod.run_metric(short_name, marker) |
| 47 | |
| 48 | self.assertEqual(measured, payload) |
| 49 | self.assertEqual( |
| 50 | run.call_args.args[0], |
| 51 | [ |
| 52 | "cargo", |
| 53 | "test", |
| 54 | "--locked", |
| 55 | "-p", |
| 56 | "codewhale-tui", |
| 57 | "--lib", |
| 58 | exact_name, |
| 59 | "--", |
| 60 | "--ignored", |
| 61 | "--exact", |
| 62 | "--nocapture", |
| 63 | "--test-threads=1", |
| 64 | ], |
| 65 | ) |
| 66 | |
| 67 | def test_successful_zero_test_run_is_rejected(self) -> None: |
| 68 | completed = subprocess.CompletedProcess( |
| 69 | args=[], |
| 70 | returncode=0, |
| 71 | stdout=( |
| 72 | "running 0 tests\n\n" |
| 73 | "test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; " |
| 74 | "0 filtered out\n" |
| 75 | ), |
| 76 | stderr="", |
| 77 | ) |
| 78 | |
| 79 | with ( |
| 80 | mock.patch.object(mod.subprocess, "run", return_value=completed), |
| 81 | redirect_stdout(io.StringIO()), |
| 82 | self.assertRaisesRegex(RuntimeError, "ran zero tests"), |
| 83 | ): |
| 84 | mod.run_metric( |
| 85 | "print_mode_tool_catalog_metrics", "TOOL_CATALOG_METRICS " |
| 86 | ) |
| 87 | |
| 88 | def test_successful_test_without_expected_marker_is_rejected(self) -> None: |
| 89 | completed = subprocess.CompletedProcess( |
| 90 | args=[], |
| 91 | returncode=0, |
| 92 | stdout=( |
| 93 | "running 1 test\n" |
| 94 | "test core::engine::tests::print_mode_tool_catalog_metrics ... ok\n\n" |
| 95 | "test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; " |
| 96 | "0 filtered out\n" |
| 97 | ), |
| 98 | stderr="", |
| 99 | ) |
| 100 | |
| 101 | with ( |
| 102 | mock.patch.object(mod.subprocess, "run", return_value=completed), |
| 103 | redirect_stdout(io.StringIO()), |
| 104 | self.assertRaisesRegex( |
| 105 | RuntimeError, |
| 106 | "missing TOOL_CATALOG_METRICS marker from exact library metric test", |
| 107 | ), |
| 108 | ): |
| 109 | mod.run_metric( |
| 110 | "print_mode_tool_catalog_metrics", "TOOL_CATALOG_METRICS " |
| 111 | ) |
| 112 | |
| 113 | |
| 114 | if __name__ == "__main__": |
| 115 | raise SystemExit(unittest.main()) |
| 116 |