test: add FeedDisplayPreferences tests

Author: fulleni

test/src/models/user_settings/feed_display_preferences_test.dart

@@ -0,0 +1,117 @@
+import 'package:ht_shared/src/models/user_settings/feed_display_preferences.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('FeedDisplayPreferences', () {
+    const defaultPreferences = FeedDisplayPreferences();
+
+    test('supports value equality', () {
+      expect(defaultPreferences, const FeedDisplayPreferences());
+    });
+
+    test('has correct default values', () {
+      expect(defaultPreferences.headlineDensity, HeadlineDensity.standard);
+      expect(
+        defaultPreferences.headlineImageStyle,
+        HeadlineImageStyle.smallThumbnail,
+      );
+      expect(defaultPreferences.showSourceInHeadlineFeed, isTrue);
+      expect(defaultPreferences.showPublishDateInHeadlineFeed, isTrue);
+    });
+
+    group('fromJson', () {
+      test('returns correct object when all fields are provided', () {
+        final json = <String, dynamic>{
+          'headlineDensity': 'compact',
+          'headlineImageStyle': 'largeThumbnail',
+          'showSourceInHeadlineFeed': false,
+          'showPublishDateInHeadlineFeed': false,
+        };
+        expect(
+          FeedDisplayPreferences.fromJson(json),
+          const FeedDisplayPreferences(
+            headlineDensity: HeadlineDensity.compact,
+            headlineImageStyle: HeadlineImageStyle.largeThumbnail,
+            showSourceInHeadlineFeed: false,
+            showPublishDateInHeadlineFeed: false,
+          ),
+        );
+      });
+
+      test('returns correct object with default values when fields are missing',
+          () {
+        final json = <String, dynamic>{}; // Empty JSON
+        expect(FeedDisplayPreferences.fromJson(json), defaultPreferences);
+      });
+    });
+
+    group('toJson', () {
+      test('returns correct JSON map', () {
+        const preferences = FeedDisplayPreferences(
+          headlineDensity: HeadlineDensity.compact,
+          headlineImageStyle: HeadlineImageStyle.largeThumbnail,
+          showSourceInHeadlineFeed: false,
+          showPublishDateInHeadlineFeed: false,
+        );
+        expect(preferences.toJson(), <String, dynamic>{
+          'headlineDensity': 'compact',
+          'headlineImageStyle': 'largeThumbnail',
+          'showSourceInHeadlineFeed': false,
+          'showPublishDateInHeadlineFeed': false,
+        });
+      });
+
+      test('returns default values in JSON if not explicitly set', () {
+        expect(defaultPreferences.toJson(), <String, dynamic>{
+          'headlineDensity': 'standard',
+          'headlineImageStyle': 'smallThumbnail',
+          'showSourceInHeadlineFeed': true,
+          'showPublishDateInHeadlineFeed': true,
+        });
+      });
+    });
+
+    group('copyWith', () {
+      test('returns a new object with updated headlineDensity', () {
+        final updated = defaultPreferences.copyWith(
+            headlineDensity: HeadlineDensity.compact,);
+        expect(updated.headlineDensity, HeadlineDensity.compact);
+        expect(
+            updated.headlineImageStyle, defaultPreferences.headlineImageStyle,);
+      });
+
+      test('returns a new object with updated headlineImageStyle', () {
+        final updated = defaultPreferences.copyWith(
+          headlineImageStyle: HeadlineImageStyle.largeThumbnail,
+        );
+        expect(updated.headlineImageStyle, HeadlineImageStyle.largeThumbnail);
+        expect(updated.headlineDensity, defaultPreferences.headlineDensity);
+      });
+
+      test('returns a new object with updated showSourceInHeadlineFeed', () {
+        final updated =
+            defaultPreferences.copyWith(showSourceInHeadlineFeed: false);
+        expect(updated.showSourceInHeadlineFeed, isFalse);
+        expect(updated.showPublishDateInHeadlineFeed, isTrue);
+      });
+
+      test('returns a new object with updated showPublishDateInHeadlineFeed',
+          () {
+        final updated =
+            defaultPreferences.copyWith(showPublishDateInHeadlineFeed: false);
+        expect(updated.showPublishDateInHeadlineFeed, isFalse);
+        expect(updated.showSourceInHeadlineFeed, isTrue);
+      });
+
+      test('returns a new object with multiple updated properties', () {
+        final updated = defaultPreferences.copyWith(
+          headlineDensity: HeadlineDensity.compact,
+          showSourceInHeadlineFeed: false,
+        );
+        expect(updated.headlineDensity, HeadlineDensity.compact);
+        expect(updated.showSourceInHeadlineFeed, isFalse);
+        expect(updated.headlineImageStyle, HeadlineImageStyle.smallThumbnail);
+      });
+    });
+  });
+}