Generate fallback relative base urls for OAS3

Author: shockey

src/execute/index.js

@@ -286,15 +286,18 @@ function buildOas3UrlWithContext(ourUrl = '', contextUrl = '') {
   const computedScheme = stripNonAlpha(parsedUrl.protocol) || stripNonAlpha(parsedContextUrl.protocol) || ''
   const computedHost = parsedUrl.host || parsedContextUrl.host
   const computedPath = parsedUrl.pathname || ''
+  let res
 
   if (computedScheme && computedHost) {
-    const res = `${computedScheme}://${computedHost + computedPath}`
+    res = `${computedScheme}://${computedHost + computedPath}`
 
     // If last character is '/', trim it off
-    return res[res.length - 1] === '/' ? res.slice(0, -1) : res
+  }
+  else {
+    res = computedPath
   }
 
-  return ''
+  return res[res.length - 1] === '/' ? res.slice(0, -1) : res
 }
 
 function getVariableTemplateNames(str) {

test/oas3/execute/main.js

@@ -497,6 +497,23 @@ describe('buildRequest - OpenAPI Specification 3.0', function () {
 
       expect(res).toEqual('http://google.com')
     })
+    it('should create a relative url based on a relative server if no contextUrl is available', function () {
+      const spec = {
+        openapi: '3.0.0',
+        servers: [
+          {
+            url: '/mypath'
+          }
+        ]
+      }
+
+      const res = baseUrl({
+        spec,
+        server: '/mypath'
+      })
+
+      expect(res).toEqual('/mypath')
+    })
     it('should return an empty string if no servers or contextUrl are provided', function () {
       const spec = {
         openapi: '3.0.0'