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

Author: Turbo87

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

@@ -1,3 +1,4 @@
+import getVersion from './versions/get.js';
 import listVersions from './versions/list.js';
 
-export default [listVersions];
+export default [listVersions, getVersion];

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

@@ -0,0 +1,25 @@
+import { http, HttpResponse } from 'msw';
+
+import { db } from '../../index.js';
+import { serializeVersion } from '../../serializers/version.js';
+import { notFound } from '../../utils/handlers.js';
+
+export default http.get('/api/v1/crates/:name/:version', async ({ params }) => {
+  let crate = db.crate.findFirst({ where: { name: { equals: params.name } } });
+  if (!crate) return notFound();
+
+  let version = db.version.findFirst({
+    where: {
+      crate: { id: { equals: crate.id } },
+      num: { equals: params.version },
+    },
+  });
+  if (!version) {
+    let errorMessage = `crate \`${crate.name}\` does not have a version \`${params.version}\``;
+    return HttpResponse.json({ errors: [{ detail: errorMessage }] }, { status: 404 });
+  }
+
+  return HttpResponse.json({
+    version: serializeVersion(version),
+  });
+});

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

@@ -0,0 +1,50 @@
+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-beta.1');
+  assert.strictEqual(response.status, 404);
+  assert.deepEqual(await response.json(), { errors: [{ detail: 'Not Found' }] });
+});
+
+test('returns 404 for unknown versions', async function () {
+  let crate = db.crate.create({ name: 'rand' });
+  db.version.create({ crate, num: '1.0.0-alpha.1' });
+  let response = await fetch('/api/v1/crates/rand/1.0.0-beta.1');
+  assert.strictEqual(response.status, 404);
+  assert.deepEqual(await response.json(), {
+    errors: [{ detail: 'crate `rand` does not have a version `1.0.0-beta.1`' }],
+  });
+});
+
+test('returns a version object for known version', async function () {
+  let crate = db.crate.create({ name: 'rand' });
+  db.version.create({ crate, num: '1.0.0-beta.1' });
+
+  let response = await fetch('/api/v1/crates/rand/1.0.0-beta.1');
+  assert.strictEqual(response.status, 200);
+  assert.deepEqual(await response.json(), {
+    version: {
+      crate: 'rand',
+      crate_size: 162_963,
+      created_at: '2010-06-16T21:30:45Z',
+      dl_path: '/api/v1/crates/rand/1.0.0-beta.1/download',
+      downloads: 3702,
+      features: {},
+      id: 1,
+      license: 'MIT',
+      links: {
+        dependencies: '/api/v1/crates/rand/1.0.0-beta.1/dependencies',
+        version_downloads: '/api/v1/crates/rand/1.0.0-beta.1/downloads',
+      },
+      num: '1.0.0-beta.1',
+      published_by: null,
+      readme_path: '/api/v1/crates/rand/1.0.0-beta.1/readme',
+      rust_version: null,
+      updated_at: '2017-02-24T12:34:56Z',
+      yank_message: null,
+      yanked: false,
+    },
+  });
+});