fix(parsers): CM-A is_test_file anchored to path components, not substring (BUG-NEW 2,22)

Local-only finder-fixes-54. 3 parametrized tests across 5 langs.
is_test_file used unanchored 'pattern in path_lower' (zig worst: bare test/spec tokens), so
real source whose name CONTAINS a token (latest/contest/attestation/inspector) was silently
dropped from extraction (skip_tests=True is the pipeline default). Anchored to exact path
DIRECTORY components + basename conventions across c/php/python/ruby/zig repository_scanner.
JS/Go already anchored -> untouched (judge-confirmed). Decoys not excluded; real test files
still excluded (recall preserved). Judge: AGREE / SHIP-AS-IS.
Local-only; not pushed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

(cherry picked from commit d8c5f3fb0387c969a7e7c899a8d59e598c46a477)

Author: gadievron

libs/openant-core/tests/parsers/test_repository_scanner_is_test_file_cma.py

@@ -0,0 +1,117 @@
+"""Cross-language regression: repository_scanner test-file classification must be anchored.
+
+Bug (path_substring_exclusion family, bundle entries [2] multi-lang + [22] zig):
+  `is_test_file` (c/php/python/ruby) and `_is_test_file`/`_is_test_directory` (zig)
+  classified a file/dir as a TEST using an UNANCHORED substring match
+  (`for pattern in test_patterns: if pattern in path_lower`). Because `test_` is a
+  substring of `latest_`/`greatest_`/`contest_`, and zig's bare `test`/`spec` tokens
+  are substrings of `latest`/`contest`/`attestation`/`inspector`, real source files
+  whose name merely CONTAINS a test token were silently classified as tests and
+  DROPPED from extraction (default `skip_tests=True`).
+
+Fix shape (one mechanism across all 5 langs): anchor the match to whole PATH
+COMPONENTS (a directory part == test/tests/spec/specs) OR basename conventions
+(`test_*`, `*_test.<ext>`, `*_spec.<ext>`, `*Test.<ext>`, `conftest.py`, etc.).
+
+This test drives each scanner's classification predicate directly:
+  - DECOY case: a real source whose name CONTAINS a token as substring -> NOT a test.
+  - POSITIVE case: a genuine test file/dir -> still IS a test (don't over-narrow).
+
+JS (`isTestFile` regex) and Go (`HasSuffix "_test.go"`) are already anchored and are
+intentionally NOT exercised here.
+"""
+
+import sys
+from pathlib import Path
+
+import pytest
+
+_CORE_ROOT = Path(__file__).resolve().parents[2]
+sys.path.insert(0, str(_CORE_ROOT))
+
+
+def _make_scanner(lang, repo_path="/tmp/repo"):
+    """Instantiate each language's RepositoryScanner with skip_tests on."""
+    if lang == "c":
+        from parsers.c.repository_scanner import RepositoryScanner
+        return RepositoryScanner(repo_path, {"skip_tests": True})
+    if lang == "php":
+        from parsers.php.repository_scanner import RepositoryScanner
+        return RepositoryScanner(repo_path, {"skip_tests": True})
+    if lang == "python":
+        from parsers.python.repository_scanner import RepositoryScanner
+        return RepositoryScanner(repo_path, {"skip_tests": True})
+    if lang == "ruby":
+        from parsers.ruby.repository_scanner import RepositoryScanner
+        return RepositoryScanner(repo_path, {"skip_tests": True})
+    if lang == "zig":
+        from parsers.zig.repository_scanner import RepositoryScanner
+        return RepositoryScanner(repo_path, skip_tests=True)
+    raise ValueError(lang)
+
+
+def _is_test(lang, scanner, relative_path):
+    """Call the per-language test-file classification predicate."""
+    if lang == "zig":
+        return scanner._is_test_file(relative_path)
+    return scanner.is_test_file(relative_path)
+
+
+# (lang, decoy_real_source_that_must_NOT_be_a_test)
+DECOYS = [
+    ("c", "latest_dir/main.c"),
+    ("c", "contest/sol.c"),
+    ("c", "src/protest.c"),
+    ("php", "src/protest_api.php"),
+    ("php", "app/latest_controller.php"),
+    ("python", "pkg/latest.py"),
+    ("python", "pkg/greatest_helper.py"),
+    ("ruby", "lib/latest_x.rb"),
+    ("ruby", "lib/contest.rb"),
+    ("zig", "src/latest.zig"),
+    ("zig", "src/contest.zig"),
+    ("zig", "src/attestation.zig"),
+    ("zig", "inspector/foo.zig"),
+]
+
+# (lang, genuine_test_file_that_MUST_still_be_classified_as_a_test)
+POSITIVES = [
+    ("c", "tests/test_foo.c"),
+    ("c", "src/foo_test.c"),
+    ("php", "tests/FooTest.php"),
+    ("php", "src/test_helper.php"),
+    ("python", "tests/test_foo.py"),
+    ("python", "pkg/conftest.py"),
+    ("ruby", "spec/foo_spec.rb"),
+    ("ruby", "test/test_foo.rb"),
+    ("zig", "test/foo.zig"),
+    ("zig", "src/foo_test.zig"),
+]
+
+
+@pytest.mark.parametrize("lang,relative_path", DECOYS)
+def test_decoy_real_source_not_classified_as_test(lang, relative_path):
+    scanner = _make_scanner(lang)
+    assert not _is_test(lang, scanner, relative_path), (
+        f"{lang}: real source {relative_path!r} wrongly classified as a test "
+        f"(unanchored substring match)"
+    )
+
+
+@pytest.mark.parametrize("lang,relative_path", POSITIVES)
+def test_positive_genuine_test_still_classified(lang, relative_path):
+    scanner = _make_scanner(lang)
+    assert _is_test(lang, scanner, relative_path), (
+        f"{lang}: genuine test {relative_path!r} must still be classified as a test"
+    )
+
+
+def test_zig_test_directory_decoy_not_excluded():
+    """zig dir-level: `inspector`/`latest` dirs must NOT be treated as test dirs."""
+    scanner = _make_scanner("zig")
+    assert not scanner._is_test_directory("inspector")
+    assert not scanner._is_test_directory("latest_dir")
+    # positive: a real `test` dir IS a test dir
+    assert scanner._is_test_directory("test")
+    assert scanner._is_test_directory("tests")
+    assert scanner._is_test_directory("spec")