add another 404 test (cov 86%)

Author: juliangruber

index.js

@@ -46,6 +46,7 @@ class Updates {
     const url = `https://api.github.com/repos/${account}/${repository}/releases?per_page=100`
     const headers = { Accept: 'application/vnd.github.preview' }
     const res = await fetch(url, { headers })
+    if (res.status >= 400) return
     const releases = await res.json()
     const latest = {}
     for (const release of releases) {

test/index.js

@@ -27,8 +27,13 @@ test('Updates', async t => {
   t.ok(body.name)
   t.match(body.url, /-mac\.zip$/)
 
+  // exists but has no releases
   res = await fetch(`${address}/juliangruber/brace-expansion/darwin/0.0.0`)
   t.equal(res.status, 404)
 
+  // doesn't exist
+  res = await fetch(`${address}/doesnot/exist-123123123/darwin/0.0.0`)
+  t.equal(res.status, 404)
+
   server.close()
 })