test(services): add tests for posts fetchers

1 files changed, 25 insertions, 0 deletions

diff --git a/src/services/graphql/fetchers/posts/fetch-recent-posts.test.ts b/src/services/graphql/fetchers/posts/fetch-recent-posts.test.ts
new file mode 100644
index 0000000..2d2fcc8
--- /dev/null
+++ b/src/services/graphql/fetchers/posts/fetch-recent-posts.test.ts
@@ -0,0 +1,25 @@
+import { afterEach, describe, expect, it } from '@jest/globals';
+import { fetchRecentPosts } from './fetch-recent-posts';
+
+describe('fetch-recent-posts', () => {
+  afterEach(() => {
+    window.history.replaceState({}, '', '/');
+  });
+
+  it('returns the WordPress most recent posts using GraphQL', async () => {
+    const result = await fetchRecentPosts({ first: 2 });
+
+    expect.assertions(1);
+
+    expect(result.edges.length).toBe(2);
+  });
+
+  it('rejects with an error when no posts are found', async () => {
+    window.history.replaceState({}, '', '/?error=true');
+    expect.assertions(1);
+
+    await expect(async () =>
+      fetchRecentPosts({ where: { authorName: 'inexistent-author' } })
+    ).rejects.toEqual(new Error('No recent posts found.'));
+  });
+});