msw: Implement GET /api/v1/crates/:name/:version/readme request handler

Author: Turbo87

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

@@ -2,7 +2,8 @@ import dependencies from './versions/dependencies.js';
 import downloads from './versions/downloads.js';
 import getVersion from './versions/get.js';
 import listVersions from './versions/list.js';
+import readme from './versions/readme.js';
 import unyankVersion from './versions/unyank.js';
 import yankVersion from './versions/yank.js';
 
-export default [listVersions, getVersion, yankVersion, unyankVersion, dependencies, downloads];
+export default [listVersions, getVersion, yankVersion, unyankVersion, dependencies, downloads, readme];

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

@@ -0,0 +1,18 @@
+import { http, HttpResponse } from 'msw';
+
+import { db } from '../../index.js';
+
+export default http.get('/api/v1/crates/:name/:version/readme', async ({ params }) => {
+  let crate = db.crate.findFirst({ where: { name: { equals: params.name } } });
+  if (!crate) return HttpResponse.html('', { status: 403 });
+
+  let version = db.version.findFirst({
+    where: {
+      crate: { id: { equals: crate.id } },
+      num: { equals: params.version },
+    },
+  });
+  if (!version || !version.readme) return HttpResponse.html('', { status: 403 });
+
+  return HttpResponse.html(version.readme);
+});

packages/crates-io-msw/handlers/versions/readme.test.js

@@ -0,0 +1,37 @@
+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/1.0.0/readme');
+  assert.strictEqual(response.status, 403);
+  assert.strictEqual(await response.text(), '');
+});
+
+test('returns 404 for unknown versions', async function () {
+  db.crate.create({ name: 'rand' });
+
+  let response = await fetch('/api/v1/crates/rand/1.0.0/readme');
+  assert.strictEqual(response.status, 403);
+  assert.strictEqual(await response.text(), '');
+});
+
+test('returns 404 for versions without README', async function () {
+  let crate = db.crate.create({ name: 'rand' });
+  db.version.create({ crate, num: '1.0.0' });
+
+  let response = await fetch('/api/v1/crates/rand/1.0.0/readme');
+  assert.strictEqual(response.status, 403);
+  assert.strictEqual(await response.text(), '');
+});
+
+test('returns the README as raw HTML', async function () {
+  let readme = 'lorem ipsum <i>est</i> dolor!';
+
+  let crate = db.crate.create({ name: 'rand' });
+  db.version.create({ crate, num: '1.0.0', readme: readme });
+
+  let response = await fetch('/api/v1/crates/rand/1.0.0/readme');
+  assert.strictEqual(response.status, 200);
+  assert.strictEqual(await response.text(), readme);
+});