add support for delay wait-on option

README.md

@@ -283,6 +283,10 @@ This utility will wait for maximum of 5 minutes while checking for the server to
 
 This utility will check for a server response every two seconds (default). Setting an environment variable `WAIT_ON_INTERVAL=600000` (milliseconds) sets the interval for example to 10 minutes.
 
+### Delay
+
+This utility will delay the initial scheduler request (default behavior is equivalent to WAIT_ON_INTERVAL). Setting an environment variable `WAIT_ON_DELAY=5000` (milliseconds) sets the intial delay for 5 seconds otherwise it will be the default WAIT_ON_INTERVAL.
+
 ### Starting two servers
 
 Sometimes you need to start one API server and one webserver in order to test the application. Use the syntax:

package.json

@@ -92,6 +92,7 @@
     "demo10": "node src/bin/start.js start-fail http://127.0.0.1:9000 test",
     "demo11": "node src/bin/start.js http-get://127.0.0.1:9000",
     "demo12": "node src/bin/start.js start-304 9000 test2",
+    "demo-delay-interval": "WAIT_ON_DELAY=1000 WAIT_ON_INTERVAL=5000 node src/bin/start.js start http://127.0.0.1:9000 test2",
     "demo-interval": "WAIT_ON_INTERVAL=1000 node src/bin/start.js start http://127.0.0.1:9000 test2",
     "demo-timeout": "WAIT_ON_TIMEOUT=10000 node src/bin/start.js start http://127.0.0.1:9000 test2",
     "demo-cross-env": "node src/bin/start.js start-cross-env 9000",

src/index.js

@@ -14,6 +14,7 @@ const debug = require('debug')('start-server-and-test')
  */
 const fiveMinutes = 5 * 60 * 1000
 const twoSeconds = 2000
+const zeroMseconds = 0
 
 const waitOnTimeout = process.env.WAIT_ON_TIMEOUT
   ? Number(process.env.WAIT_ON_TIMEOUT)
@@ -23,6 +24,10 @@ const waitOnInterval = process.env.WAIT_ON_INTERVAL
   ? Number(process.env.WAIT_ON_INTERVAL)
   : twoSeconds
 
+const waitOnDelay = process.env.WAIT_ON_DELAY
+  ? Number(process.env.WAIT_ON_DELAY)
+  : zeroMseconds
+
 const isDebug = () =>
   process.env.DEBUG && process.env.DEBUG.indexOf('start-server-and-test') !== -1
 
@@ -81,6 +86,7 @@ function waitAndRun ({ start, url, runFn }) {
     const options = {
       resources: Array.isArray(url) ? url : [url],
       interval: waitOnInterval,
+      delay: waitOnDelay,
       window: 1000,
       timeout: waitOnTimeout,
       verbose: isDebug(),

src/utils.js

@@ -207,6 +207,10 @@ function printArguments ({ services, test }) {
     console.log('WAIT_ON_TIMEOUT is set to', process.env.WAIT_ON_TIMEOUT)
   }
 
+  if (process.env.WAIT_ON_DELAY !== undefined) {
+    console.log('WAIT_ON_DELAY is set to', process.env.WAIT_ON_DELAY)
+  }
+
   console.log('running tests using command "%s"', test)
   console.log('')
 }