1 files changed, 67 insertions, 0 deletions
diff --git a/src/services/graphql/helpers/build-comments-tree.test.ts b/src/services/graphql/helpers/build-comments-tree.test.ts
new file mode 100644
index 0000000..cd9fa40
--- /dev/null
+++ b/src/services/graphql/helpers/build-comments-tree.test.ts
@@ -0,0 +1,67 @@
+import { describe, expect, it } from '@jest/globals';
+import type { SingleComment } from '../../../types';
+import { buildCommentsTree } from './build-comments-tree';
+
+describe('build-comments-tree', () => {
+  it('transforms a flat comments array to a comments tree', () => {
+    const firstComment = {
+      content: 'Non non provident mollitia a.',
+      id: 1,
+      isApproved: true,
+      meta: { author: { name: 'Emma_Muller' }, date: '2022-11-02' },
+      replies: [],
+    } satisfies SingleComment;
+    const firstCommentReplies = [
+      {
+        content: 'Et omnis voluptatem est atque.',
+        id: 3,
+        isApproved: true,
+        meta: { author: { name: 'Patrick.Goodwin44' }, date: '2022-11-05' },
+        replies: [],
+        parentId: 1,
+      },
+    ] satisfies SingleComment[];
+    const secondComment = {
+      content: 'Vero iure architecto modi iusto qui.',
+      id: 2,
+      isApproved: true,
+      meta: { author: { name: 'Dominique13' }, date: '2022-11-04' },
+      replies: [],
+    } satisfies SingleComment;
+    const secondCommentReplies = [
+      {
+        content: 'Qui quaerat quas quia praesentium quasi.',
+        id: 4,
+        isApproved: true,
+        meta: { author: { name: 'Patrick.Goodwin44' }, date: '2022-11-05' },
+        replies: [],
+        parentId: 2,
+      },
+      {
+        content: 'Ut officia aliquid harum voluptas molestiae quo.',
+        id: 5,
+        isApproved: true,
+        meta: { author: { name: 'Ariel.Braun6' }, date: '2022-11-06' },
+        replies: [],
+        parentId: 2,
+      },
+    ] satisfies SingleComment[];
+    const comments: SingleComment[] = [
+      firstComment,
+      secondComment,
+      ...firstCommentReplies,
+      ...secondCommentReplies,
+    ];
+    const result = buildCommentsTree(comments);
+
+    expect(result).toHaveLength(2);
+    expect(result[0]).toStrictEqual({
+      ...firstComment,
+      replies: firstCommentReplies,
+    });
+    expect(result[1]).toStrictEqual({
+      ...secondComment,
+      replies: secondCommentReplies,
+    });
+  });
+});