prepare for multiple apps

apps/weblibre/test/presentation/main_app_test.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:weblibre/presentation/main_app.dart';
+
+void main() {
+  group('applyAppMediaQueryOverrides', () {
+    test('returns the original media query when no overrides are enabled', () {
+      const mediaQuery = MediaQueryData();
+
+      final result = applyAppMediaQueryOverrides(
+        mediaQuery: mediaQuery,
+        uiScaleFactor: 1.0,
+        disableAnimations: false,
+      );
+
+      expect(result, same(mediaQuery));
+    });
+
+    test(
+      'preserves the system animation preference when app override is off',
+      () {
+        const mediaQuery = MediaQueryData(disableAnimations: true);
+
+        final result = applyAppMediaQueryOverrides(
+          mediaQuery: mediaQuery,
+          uiScaleFactor: 1.0,
+          disableAnimations: false,
+        );
+
+        expect(result.disableAnimations, isTrue);
+        expect(result, same(mediaQuery));
+      },
+    );
+
+    test('forces animations off when the app setting is enabled', () {
+      // ignore: avoid_redundant_argument_values
+      const mediaQuery = MediaQueryData(disableAnimations: false);
+
+      final result = applyAppMediaQueryOverrides(
+        mediaQuery: mediaQuery,
+        uiScaleFactor: 1.0,
+        disableAnimations: true,
+      );
+
+      expect(result.disableAnimations, isTrue);
+    });
+
+    test('applies ui scale on top of the base text scaler', () {
+      const mediaQuery = MediaQueryData();
+
+      final result = applyAppMediaQueryOverrides(
+        mediaQuery: mediaQuery,
+        uiScaleFactor: 1.25,
+        disableAnimations: false,
+      );
+
+      expect(result.textScaler.scale(20), 25);
+    });
+  });
+}