test(services): add tests for posts fetchers

1 files changed, 50 insertions, 0 deletions

diff --git a/tests/msw/handlers/posts/posts-list.handler.ts b/tests/msw/handlers/posts/posts-list.handler.ts
new file mode 100644
index 0000000..7f8daf6
--- /dev/null
+++ b/tests/msw/handlers/posts/posts-list.handler.ts
@@ -0,0 +1,50 @@
+import { type ExecutionResult, graphql as executeGraphql } from 'graphql';
+import { HttpResponse, graphql } from 'msw';
+import type {
+  FetchPostsListInput,
+  PostsListResponse,
+} from '../../../../src/services/graphql';
+import { wpPostsFixture } from '../../../fixtures';
+import { getConnection } from '../../../utils/graphql';
+import { schema } from '../../schema';
+
+export const postsListHandler = graphql.query<
+  PostsListResponse,
+  FetchPostsListInput
+>('PostsList', async ({ query, variables }) => {
+  const pageParams = new URLSearchParams(window.location.search);
+  const isError = pageParams.get('error') === 'true';
+
+  if (isError) return HttpResponse.json({ data: { posts: null } });
+
+  const { data, errors } = (await executeGraphql({
+    schema,
+    source: query,
+    variableValues: variables,
+    rootValue: {
+      posts({ after, first, where }: typeof variables) {
+        const { authorName, search, title } = where ?? {};
+        const filteredPostsByAuthor = authorName
+          ? wpPostsFixture.filter((post) =>
+              post.author.node.name.includes(authorName)
+            )
+          : wpPostsFixture;
+        const filteredPostsByTitle = title
+          ? filteredPostsByAuthor.filter((post) => post.title.includes(title))
+          : filteredPostsByAuthor;
+        const filteredPosts = search
+          ? filteredPostsByTitle.filter(
+              (post) =>
+                post.title.includes(search) ||
+                post.contentParts.afterMore.includes(search) ||
+                post.contentParts.beforeMore.includes(search)
+            )
+          : filteredPostsByTitle;
+
+        return getConnection({ after, data: filteredPosts, first });
+      },
+    },
+  })) as ExecutionResult<PostsListResponse>;
+
+  return HttpResponse.json({ data, errors });
+});