Run service tests on a given (remote) instance; test on [jetbrains] (#2195)

* Allow to run service tests for remote shields instance

* Allow to run service tests for remote shields instance - doc

* Load testedServerUrl from env variable

* Load 'skipIntercepted' flag from env variable

lib/service-test-runner/cli.js

@@ -9,6 +9,12 @@
 // Alternatively, pass a newline-separated list of services to stdin.
 //   echo "service1\nservice2\nservice3" | npm run test:services -- --stdin
 //
+// Run tests but skip tests which intercept requests:
+//   SKIP_INTERCEPTED=TRUE npm run test:services --
+//
+// Run tests on a given instance:
+//   SKIP_INTERCEPTED=TRUE TESTED_SERVER_URL=https://test.shields.io npm run test:services --
+//
 // Service tests are run in CI in two cases: scheduled builds and pull
 // requests. The scheduled builds run _all_ the service tests, whereas the
 // pull requests run service tests designated in the PR title. In this way,

lib/test-config.js

@@ -1,5 +1,11 @@
 'use strict'
 
+const envFlag = require('node-env-flag')
+
 module.exports = {
   port: 1111,
+  get testedServerUrl() {
+    return process.env.TESTED_SERVER_URL || `http://localhost:${this.port}`
+  },
+  skipIntercepted: envFlag(process.env.SKIP_INTERCEPTED, false),
 }