More test coverage (71%)

tests/test_platform_backends.py

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+from __future__ import annotations
+
+from collections import defaultdict
+
+
+def test_dpkg_backend_modified_paths_marks_conffiles_and_packaged(monkeypatch):
+    from enroll.platform import DpkgBackend
+
+    # Provide fake conffiles md5sums.
+    monkeypatch.setattr(
+        "enroll.debian.parse_status_conffiles",
+        lambda: {"mypkg": {"/etc/mypkg.conf": "aaaa"}},
+    )
+    monkeypatch.setattr(
+        "enroll.debian.read_pkg_md5sums",
+        lambda _pkg: {"etc/other.conf": "bbbb"},
+    )
+
+    # Fake file_md5 values (avoids touching /etc).
+    def fake_md5(p: str):
+        if p == "/etc/mypkg.conf":
+            return "zzzz"  # differs from conffile baseline
+        if p == "/etc/other.conf":
+            return "cccc"  # differs from packaged baseline
+        if p == "/etc/apt/sources.list":
+            return "bbbb"
+        return None
+
+    monkeypatch.setattr("enroll.platform.file_md5", fake_md5)
+
+    b = DpkgBackend()
+    out = b.modified_paths(
+        "mypkg",
+        ["/etc/mypkg.conf", "/etc/other.conf", "/etc/apt/sources.list"],
+    )
+
+    assert out["/etc/mypkg.conf"] == "modified_conffile"
+    assert out["/etc/other.conf"] == "modified_packaged_file"
+    # pkg config paths (like /etc/apt/...) are excluded.
+    assert "/etc/apt/sources.list" not in out
+
+
+def test_rpm_backend_modified_paths_caches_queries(monkeypatch):
+    from enroll.platform import RpmBackend
+
+    calls = defaultdict(int)
+
+    def fake_modified(_pkg=None):
+        calls["modified"] += 1
+        return {"/etc/foo.conf", "/etc/bar.conf"}
+
+    def fake_config(_pkg=None):
+        calls["config"] += 1
+        return {"/etc/foo.conf"}
+
+    monkeypatch.setattr("enroll.rpm.rpm_modified_files", fake_modified)
+    monkeypatch.setattr("enroll.rpm.rpm_config_files", fake_config)
+
+    b = RpmBackend()
+    etc = ["/etc/foo.conf", "/etc/bar.conf", "/etc/baz.conf"]
+
+    out1 = b.modified_paths("ignored", etc)
+    out2 = b.modified_paths("ignored", etc)
+
+    assert out1 == out2
+    assert out1["/etc/foo.conf"] == "modified_conffile"
+    assert out1["/etc/bar.conf"] == "modified_packaged_file"
+    assert "/etc/baz.conf" not in out1
+
+    # Caches should mean we only queried rpm once.
+    assert calls["modified"] == 1
+    assert calls["config"] == 1