fix: test case for safefetch

Author: Dipper30

test/lib/core/fetch_factory.test.js

@@ -24,6 +24,27 @@ describe('test/lib/core/fetch_factory.test.js', () => {
     let host;
     const fetch = safeFetch.bind({
       config: {
+        httpclient: {
+          // ensure dns resolve succeeds
+          lookup(hostname, options, callback) {
+            const IP_REGEX = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/;
+            if (IP_REGEX.test(hostname)) {
+              const family = typeof options.family === 'number' ? options.family : 4;
+              if (options.all) {
+                callback(null, [{ address: hostname, family }]);
+              } else {
+                callback(null, hostname, family);
+              }
+            } else {
+              const resultIp = '127.0.0.1'
+              if (options.all) {
+                callback(null, [{ address: resultIp, family: 4 }]);
+              } else {
+                callback(null, resultIp, 4);
+              }
+            }
+          },
+        },
         security: {
           ssrf: {
             checkAddress(aIp, aFamily, aHost) {