test: make the SDDM selftest independent of SDDM_KEYS

1 files changed, 25 insertions, 10 deletions

diff --git a/bin/udt-accent b/bin/udt-accent
index 610b04e..8d6a229 100755
--- a/bin/udt-accent
+++ b/bin/udt-accent
@@ -398,16 +398,31 @@ def selftest():
             assert min(delta, 2 * math.pi - delta) < math.pi, (name, neighbour)
 
     # The SDDM theme reads this file through a symlink, so it has to carry every
-    # key the theme asks for, and a second run has to overwrite cleanly rather
-    # than append.
-    palette = {k: "#1e2030" for k in SDDM_KEYS}
-    probe_image = Path(tempfile.mkdtemp()) / "wall.png"
-    probe_image.write_bytes(b"")
-    text = sddm_conf(palette, FALLBACK, str(probe_image))
-    for key in ["type", "background", "accent", *SDDM_KEYS]:
-        assert f"\n{key}=" in "\n" + text, f"sddm conf missing {key}"
-    assert text.count("accent=") == 1
-    assert "background=" + str(probe_image) in text
+    # key the theme asks for. The names are spelled out here rather than read
+    # from SDDM_KEYS: deriving both the input and the check from the same
+    # constant would still pass if a key were dropped from the writer's list.
+    expected_keys = [
+        "base", "mantle", "crust", "surface0", "surface1", "surface2",
+        "text", "subtext0", "subtext1", "overlay0", "overlay1", "overlay2",
+        "red", "yellow", "green", "teal", "blue", "lavender",
+    ]
+    with tempfile.TemporaryDirectory() as tmpdir:
+        probe_image = Path(tmpdir) / "wall.png"
+        probe_image.write_bytes(b"")
+        palette = {k: "#1e2030" for k in expected_keys}
+        text = sddm_conf(palette, FALLBACK, str(probe_image))
+        for key in ["type", "background", "accent", *expected_keys]:
+            assert f"\n{key}=" in "\n" + text, f"sddm conf missing {key}"
+        assert text.count("accent=") == 1
+        assert "background=" + os.path.realpath(probe_image) in text
+
+        # A second run has to overwrite cleanly rather than append: the greeter
+        # rereads this file through a symlink on every login.
+        target = Path(tmpdir) / "sddm-theme.conf"
+        write_atomic(target, text)
+        write_atomic(target, sddm_conf(palette, FALLBACK, str(probe_image)))
+        assert target.read_text() == text, "second write changed the output"
+        assert target.read_text().count("[General]") == 1, "second write appended"
 
     print("selftest OK")