Add test for NPM registry

.registry/server.js

@@ -30,10 +30,12 @@ app.use('/-/:tarball', (req,res,next) => {
 app.use('/-', express.static(__dirname))
 
 app.get('/*', (req,res)=>{
+  const urlRegex = /^\/(@\w+)\/(\w+)/
   const url = decodeURIComponent(req.url)
   console.debug ('GET',url)
   try {
-    const [, scpe, pkg ] = /^\/(@\w+)\/(\w+)/.exec(url)
+    if (!urlRegex.test(url))  return res.sendStatus(404)
+    const [, scpe, pkg ] = urlRegex.exec(url)
     const package = require (`${scpe}/${pkg}/package.json`)
     const tarball = `${scpe.slice(1)}-${pkg}-${package.version}.tgz`
     // https://github.com/npm/registry/blob/master/docs/responses/package-metadata.md
@@ -47,24 +49,25 @@ app.get('/*', (req,res)=>{
           "name": package.name,
           "version": package.version,
           "dist": {
-            "tarball": `http://localhost:${port}/-/${tarball}`
+            "tarball": `/-/${tarball}`
           },
         }
       },
     })
   } catch (e) {
-    console.error(e)
+    if (e.code === 'MODULE_NOT_FOUND')  return res.sendStatus(404)
-    res.sendStatus(404)
+    console.error(e);  throw e
   }
 })
 
 const server = app.listen(port, ()=>{
-  const url = `http://localhost:${port}`
+  const url = `http://localhost:${server.address().port}`
   console.log (`npm set ${scope}:registry=${url}`)
   exec(`npm set ${scope}:registry=${url}`)
   console.log (`${scope} registry listening on ${url}`)
 })
 
+
 const _exit = ()=>{
   server.close()
   exec(`npm conf rm "${scope}:registry"`, ()=> { process.exit() })

test/registry.test.js

@@ -0,0 +1,54 @@
+
+const { fork } = require('child_process')
+const { resolve } = require('path')
+const Axios = require('axios')
+const verbose = process.env.CDS_TEST_VERBOSE
+// ||true
+
+describe('Local NPM registry', () => {
+  let registry
+  let axios
+  const cwd = resolve(__dirname, '..')
+
+  beforeAll(async ()=> {
+    const env = Object.assign(process.env, {PORT:'0'})
+    const res = await exec (resolve(cwd, '.registry/server.js'), {cwd, stdio: 'pipe', env})
+    registry = res.cp
+    axios = Axios.default.create ({ baseURL: res.url, validateStatus: (status)=>status<500 })
+  })
+
+  afterAll(() => { registry.kill() })
+
+  for (const mod of ['bookshop','fiori','orders','reviews']) {
+    it(`should serve ${mod}`, async () => {
+      const resp = await axios.get(`/@capire/${mod}`)
+      expect(resp.data).toMatchObject({name: `@capire/${mod}`, versions:{}})
+      const versions = Object.values(resp.data.versions)
+      await axios.get(versions[0].dist.tarball)
+    })
+  }
+  it(`should return 404 for unknown packages`, async () => {
+    let resp = await axios.get(`/@capire/foo`)
+    expect(resp.status).toEqual(404)
+    resp = await axios.get(`/foo`)
+    expect(resp.status).toEqual(404)
+  })
+
+})
+
+function exec (script, opts) {
+  return new Promise((resolve, reject)=> {
+    const cp = fork (script, [], opts)
+      .on('error', err => reject(new Error(err)))
+    cp.stdout.on('data', chunk => {
+      if (verbose) console.log(chunk.toString())
+      if (chunk.toString().match(/listening.*(http:.*:\d+)/i)) {
+         resolve({cp, url:RegExp.$1})
+      }
+    })
+    cp.stderr.on('data', chunk => {
+      if (verbose)  console.error(chunk.toString())
+    })
+  })
+
+}