msw: Implement GET /api/v1/crates/:name/downloads request handler

Author: Turbo87

packages/crates-io-msw/handlers/crates.js

@@ -1,4 +1,5 @@
 import deleteCrate from './crates/delete.js';
+import downloads from './crates/downloads.js';
 import followCrate from './crates/follow.js';
 import following from './crates/following.js';
 import getCrate from './crates/get.js';
@@ -7,4 +8,14 @@ import teamOwners from './crates/team-owners.js';
 import unfollowCrate from './crates/unfollow.js';
 import userOwners from './crates/user-owners.js';
 
-export default [listCrates, getCrate, deleteCrate, following, followCrate, unfollowCrate, userOwners, teamOwners];
+export default [
+  listCrates,
+  getCrate,
+  deleteCrate,
+  following,
+  followCrate,
+  unfollowCrate,
+  userOwners,
+  teamOwners,
+  downloads,
+];

packages/crates-io-msw/handlers/crates/downloads.js

@@ -0,0 +1,20 @@
+import { http, HttpResponse } from 'msw';
+
+import { db } from '../../index.js';
+import { notFound } from '../../utils/handlers.js';
+
+export default http.get('/api/v1/crates/:name/downloads', async ({ params }) => {
+  let crate = db.crate.findFirst({ where: { name: { equals: params.name } } });
+  if (!crate) return notFound();
+
+  let downloads = db.versionDownload.findMany({ where: { version: { crate: { id: { equals: crate.id } } } } });
+
+  return HttpResponse.json({
+    version_downloads: downloads.map(download => ({
+      date: download.date,
+      downloads: download.downloads,
+      version: download.version.id,
+    })),
+    meta: { extra_downloads: crate._extra_downloads },
+  });
+});

packages/crates-io-msw/handlers/crates/downloads.test.js

@@ -0,0 +1,55 @@
+import { assert, test } from 'vitest';
+
+import { db } from '../../index.js';
+
+test('returns 404 for unknown crates', async function () {
+  let response = await fetch('/api/v1/crates/foo/downloads');
+  assert.strictEqual(response.status, 404);
+  assert.deepEqual(await response.json(), { errors: [{ detail: 'Not Found' }] });
+});
+
+test('empty case', async function () {
+  db.crate.create({ name: 'rand' });
+
+  let response = await fetch('/api/v1/crates/rand/downloads');
+  assert.strictEqual(response.status, 200);
+  assert.deepEqual(await response.json(), {
+    version_downloads: [],
+    meta: {
+      extra_downloads: [],
+    },
+  });
+});
+
+test('returns a list of version downloads belonging to the specified crate version', async function () {
+  let crate = db.crate.create({ name: 'rand' });
+  let versions = Array.from({ length: 2 }, () => db.version.create({ crate }));
+  db.versionDownload.create({ version: versions[0], date: '2020-01-13' });
+  db.versionDownload.create({ version: versions[1], date: '2020-01-14' });
+  db.versionDownload.create({ version: versions[1], date: '2020-01-15' });
+
+  let response = await fetch('/api/v1/crates/rand/downloads');
+  assert.strictEqual(response.status, 200);
+  assert.deepEqual(await response.json(), {
+    version_downloads: [
+      {
+        date: '2020-01-13',
+        downloads: 7035,
+        version: 1,
+      },
+      {
+        date: '2020-01-14',
+        downloads: 14_070,
+        version: 2,
+      },
+      {
+        date: '2020-01-15',
+        downloads: 21_105,
+        version: 2,
+      },
+    ],
+    meta: {
+      extra_downloads: [],
+    },
+  });
+});