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diff --git a/src/services/graphql/helpers/convert-post-preview-to-article-preview.test.ts b/src/services/graphql/helpers/convert-post-preview-to-article-preview.test.ts
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+++ b/src/services/graphql/helpers/convert-post-preview-to-article-preview.test.ts
@@ -0,0 +1,130 @@
+import { describe, expect, it } from '@jest/globals';
+import type { WPPostPreview, WPThematicPreview } from '../../../types';
+import { convertPostPreviewToArticlePreview } from './convert-post-preview-to-article-preview';
+import { convertTaxonomyToPageLink } from './convert-taxonomy-to-page-link';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+describe('convert-post-preview-to-article-preview', () => {
+  /* eslint-disable max-statements */
+  it('converts a RecentWPPost object to a RecentArticle object', () => {
+    const post: WPPostPreview = {
+      acfPosts: null,
+      commentCount: 6,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: null,
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    };
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.id).toBe(post.databaseId);
+    expect(result.intro).toBe(post.contentParts.beforeMore);
+    expect(result.meta.commentsCount).toBe(post.commentCount);
+    expect(result.meta.cover).toBeUndefined();
+    expect(result.meta.dates.publication).toBe(post.date);
+    expect(result.meta.dates.update).toBe(post.modified);
+    expect(result.meta.thematics).toBeUndefined();
+    expect(result.meta.wordsCount).toBe(post.info.wordsCount);
+    expect(result.slug).toBe(post.slug);
+    expect(result.title).toBe(post.title);
+  });
+  /* eslint-enable max-statements */
+
+  it('can return 0 as comment count if not defined', () => {
+    const post: WPPostPreview = {
+      acfPosts: null,
+      commentCount: null,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: null,
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    };
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.meta.commentsCount).toBe(0);
+  });
+
+  it('can convert the cover', () => {
+    const post = {
+      acfPosts: null,
+      commentCount: null,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: {
+        node: {
+          altText: 'molestiae praesentium animi',
+          mediaDetails: {
+            height: 480,
+            width: 640,
+          },
+          sourceUrl: 'https://picsum.photos/640/480',
+          title: 'ullam deserunt perspiciatis',
+        },
+      },
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    } satisfies WPPostPreview;
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.meta.cover).toStrictEqual(
+      convertWPImgToImg(post.featuredImage.node)
+    );
+  });
+
+  it('can convert the thematics', () => {
+    const thematics: WPThematicPreview[] = [
+      { databaseId: 2, slug: '/thematic1', title: 'aut quis vel' },
+      { databaseId: 8, slug: '/thematic2', title: 'vel sint autem' },
+    ];
+    const post: WPPostPreview = {
+      acfPosts: {
+        postsInThematic: thematics,
+      },
+      commentCount: 6,
+      contentParts: {
+        beforeMore:
+          'Et quos fuga molestias. Voluptatum nobis mollitia eaque dolorem sunt. Dolores dignissimos consequuntur mollitia. Enim molestias quibusdam sequi. Dolore ut quo. Libero iure non vel reprehenderit.',
+      },
+      databaseId: 5,
+      date: '2021-04-28',
+      featuredImage: null,
+      info: {
+        wordsCount: 450,
+      },
+      modified: '2021-04-29',
+      slug: '/the-post-slug',
+      title: 'et tempore sint',
+    };
+    const result = convertPostPreviewToArticlePreview(post);
+
+    expect(result.meta.thematics).toStrictEqual(
+      thematics.map(convertTaxonomyToPageLink)
+    );
+  });
+});