feat(retry): accept shorthand retry settings

index.js

@@ -61,6 +61,11 @@ function cachingFetch (uri, _opts) {
   if (opts.integrity && !ssri) {
     ssri = require('ssri')
   }
+  if (opts.retry && typeof opts.retry === 'number') {
+    opts.retry = {retries: opts.retry}
+  } else if (opts.retry === false) {
+    opts.retry = {retries: 0}
+  }
   opts.cacheManager = opts.cacheManager && (
     typeof opts.cacheManager === 'string'
     ? new Cache(opts.cacheManager, opts.cacheOpts)
@@ -326,7 +331,7 @@ function remoteFetch (uri, opts) {
         throw err
       }
     })
-  }, opts.retry === false ? { retries: 0 } : opts.retry).catch(err => {
+  }, opts.retry).catch(err => {
     if (err.status >= 400) {
       return err
     } else {

test/fetch.js

@@ -286,4 +286,29 @@ test('retries non-POST requests on 500 errors', t => {
   })
 })
 
+test('accepts opts.retry shorthands', t => {
+  const srv = tnock(t, HOST)
+  srv.get('/test').reply(500, '')
+  return fetch(`${HOST}/test`, {
+    retry: false
+  }).then(res => {
+    t.equal(res.status, 500, 'did not retry')
+    srv.get('/test').reply(500, () => {
+      srv.get('/test').reply(200, CONTENT)
+      return ''
+    })
+    return fetch(`${HOST}/test`, {
+      retry: 1
+    })
+  }).then(res => {
+    t.equal(res.status, 200, 'retried once')
+    srv.get('/test').twice().reply(500)
+    return fetch(`${HOST}/test`, {
+      retry: 1
+    })
+  }).then(res => {
+    t.equal(res.status, 500, 'failed on second retry')
+  })
+})
+
 test('retries non-POST requests on ECONNRESET')