fix(request): correct url as a string handling

package.json

@@ -63,7 +63,7 @@
     "esdoc-coverage-plugin": "^1.1.0",
     "esdoc-flow-plugin": "^1.0.0",
     "esdoc-standard-plugin": "^1.0.0",
-    "eslint-plugin-flowtype": "^3.12.2",
+    "eslint-plugin-flowtype": "^3.13.0",
     "flow-bin": "^0.104.0",
     "flow-coverage-report": "^0.6.1",
     "flow-remove-types": "^2.104.0",

src/main/js/request.js

@@ -103,10 +103,15 @@ export class ReqOptions {
     this.app = input.app || DEFAULT_APP
 
     const headers = {}
-    const urlStr: string = input.url || 'http://localhost'
+    const urlStr: string = input.url || '/'
     const urlOpts = input.host
       ? input
-      : { host: urlStr }
+      : url.parse(urlStr) // eslint-disable-line
+
+    // NOTE host & protocol are required by URL constructor
+    urlOpts.host = urlOpts.host || 'localhost'
+    urlOpts.protocol = urlOpts.protocol || 'http'
+
     const urlData: IUrl = new url.URL(url.format(urlOpts))
     const connection = assign(
       { encrypted: urlData.protocol === 'https:' },

src/test/js/reqresnext.js

@@ -4,7 +4,7 @@ describe('reqresnext', () => {
   it('generates proper result map', () => {
     const { req, res, next } = reqresnext({
       method: 'GET',
-      url: 'http://example.com'
+      url: '/example.com'
     })
 
     expect(req).toEqual(expect.any(Object))

src/test/js/request.js

@@ -29,6 +29,14 @@ describe('request', () => {
         expect(req.host).toBe('foobar.com')
         expect(req.protocol).toBe('http')
       })
+
+      it('attaches default host and protocol values', () => {
+        const req = new Request({ url: '/example.com' })
+
+        expect(req.url).toBe('/example.com')
+        expect(req.host).toBe('localhost')
+        expect(req.protocol).toBe('http')
+      })
     })
 
     describe('headers', () => {