Various tweaks to theme, more code coverage

tests/test_entrypoints.py

@@ -0,0 +1,69 @@
+import importlib
+
+
+def test___main___exports_main():
+    entry_mod = importlib.import_module("bouquin.__main__")
+    main_mod = importlib.import_module("bouquin.main")
+    assert entry_mod.main is main_mod.main
+
+
+def test_main_entry_initializes_qt(monkeypatch):
+    main_mod = importlib.import_module("bouquin.main")
+
+    # Fakes to avoid real Qt event loop
+    class FakeApp:
+        def __init__(self, argv):
+            self.argv = argv
+            self.name = None
+            self.org = None
+
+        def setApplicationName(self, n):
+            self.name = n
+
+        def setOrganizationName(self, n):
+            self.org = n
+
+        def exec(self):
+            return 0
+
+    class FakeWin:
+        def __init__(self, themes=None):
+            self.themes = themes
+            self.shown = False
+
+        def show(self):
+            self.shown = True
+
+    class FakeThemes:
+        def __init__(self, app, cfg):
+            self._applied = None
+            self.app = app
+            self.cfg = cfg
+
+        def apply(self, t):
+            self._applied = t
+
+    class FakeSettings:
+        def __init__(self):
+            self._map = {"ui/theme": "dark"}
+
+        def value(self, k, default=None, type=None):
+            return self._map.get(k, default)
+
+    def fake_get_settings():
+        return FakeSettings()
+
+    monkeypatch.setattr(main_mod, "QApplication", FakeApp)
+    monkeypatch.setattr(main_mod, "MainWindow", FakeWin)
+    monkeypatch.setattr(main_mod, "ThemeManager", FakeThemes)
+    monkeypatch.setattr(main_mod, "get_settings", fake_get_settings)
+
+    exits = {}
+
+    def fake_exit(code):
+        exits["code"] = code
+
+    monkeypatch.setattr(main_mod.sys, "exit", fake_exit)
+
+    main_mod.main()
+    assert exits.get("code", None) == 0