feature: added a calculated property to articles entity to get the te…

…xt that is going to be used in ChatGPT API request

lib/features/news_feed/domain/entities/news_feed_entity.dart

@@ -57,6 +57,17 @@ class ArticlesEntity extends Equatable {
     }
   }
 
+  String get gptArticleContent{
+    if(content != null) {
+      return content!;
+    }
+    else {
+      final resultText = "${title ?? ""} ${description ?? ""}";
+      //remove the space characters at the beginning and end (if any)
+      return resultText.trim();
+    }
+  }
+
   @override
   List<Object?> get props => [
         source,

test/features/news_feed/domain/entities/news_feed_entity_test.dart

@@ -86,6 +86,44 @@ void main() {
       expect(result, equals('3 Days ago'));
     });
   });
+
+  group("gptArticleContent tests",(){
+    test("should return content when content is not null", () {
+      const testArticlesEntity = ArticlesEntity(
+        title:"Title",
+        description: "Description",
+        content: "Content",
+      );
+      expect(testArticlesEntity.gptArticleContent, equals("Content"));
+    });
+
+    test("should return combination this string: title + space character + description when content is null", () {
+      const testArticlesEntity = ArticlesEntity(
+        title:"Title",
+        description: "Description",
+      );
+      expect(testArticlesEntity.gptArticleContent, equals("Title Description"));
+    });
+
+    test("should return empty string when both title, description and content are null", () {
+      const testArticlesEntity = ArticlesEntity();
+      expect(testArticlesEntity.gptArticleContent, equals(""));
+    });
+
+    test("should return title when description is null", () {
+      const testArticlesEntity = ArticlesEntity(
+        title:"Title",
+      );
+      expect(testArticlesEntity.gptArticleContent, equals('Title'));
+    });
+
+    test("should return description when title is null", () {
+      const testArticlesEntity = ArticlesEntity(
+        description: "Description",
+      );
+      expect(testArticlesEntity.gptArticleContent, equals('Description'));
+    });
+  });
 }
 
 /*