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backend/node_modules/avvio/test/callbacks.test.js

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+'use strict'
+
+const { test } = require('tap')
+const boot = require('..')
+
+test('reentrant', (t) => {
+  t.plan(7)
+
+  const app = boot()
+  let firstLoaded = false
+  let secondLoaded = false
+
+  app
+    .use(first)
+    .after(() => {
+      t.ok(firstLoaded, 'first is loaded')
+      t.ok(secondLoaded, 'second is loaded')
+      t.pass('booted')
+    })
+
+  function first (s, opts, done) {
+    t.notOk(firstLoaded, 'first is not loaded')
+    t.notOk(secondLoaded, 'second is not loaded')
+    firstLoaded = true
+    s.use(second)
+    done()
+  }
+
+  function second (s, opts, done) {
+    t.ok(firstLoaded, 'first is loaded')
+    t.notOk(secondLoaded, 'second is not loaded')
+    secondLoaded = true
+    done()
+  }
+})
+
+test('reentrant with callbacks deferred', (t) => {
+  t.plan(11)
+
+  const app = boot()
+  let firstLoaded = false
+  let secondLoaded = false
+  let thirdLoaded = false
+
+  app.use(first)
+
+  function first (s, opts, done) {
+    t.notOk(firstLoaded, 'first is not loaded')
+    t.notOk(secondLoaded, 'second is not loaded')
+    t.notOk(thirdLoaded, 'third is not loaded')
+    firstLoaded = true
+    s.use(second)
+    setTimeout(() => {
+      try {
+        s.use(third)
+      } catch (err) {
+        t.equal(err.message, 'Root plugin has already booted')
+      }
+    }, 500)
+    done()
+  }
+
+  function second (s, opts, done) {
+    t.ok(firstLoaded, 'first is loaded')
+    t.notOk(secondLoaded, 'second is not loaded')
+    t.notOk(thirdLoaded, 'third is not loaded')
+    secondLoaded = true
+    done()
+  }
+
+  function third (s, opts, done) {
+    thirdLoaded = true
+    done()
+  }
+
+  app.on('start', () => {
+    t.ok(firstLoaded, 'first is loaded')
+    t.ok(secondLoaded, 'second is loaded')
+    t.notOk(thirdLoaded, 'third is not loaded')
+    t.pass('booted')
+  })
+})
+
+test('multiple loading time', t => {
+  t.plan(1)
+  const app = boot()
+
+  function a (instance, opts, done) {
+    (opts.use || []).forEach(_ => { instance.use(_, { use: opts.subUse || [] }) })
+    setTimeout(done, 10)
+  }
+  const pointer = a
+
+  function b (instance, opts, done) {
+    (opts.use || []).forEach(_ => { instance.use(_, { use: opts.subUse || [] }) })
+    setTimeout(done, 20)
+  }
+
+  function c (instance, opts, done) {
+    (opts.use || []).forEach(_ => { instance.use(_, { use: opts.subUse || [] }) })
+    setTimeout(done, 30)
+  }
+
+  app
+    .use(function a (instance, opts, done) {
+      instance.use(pointer, { use: [b], subUse: [c] })
+        .use(b)
+      setTimeout(done, 0)
+    })
+    .after(() => {
+      t.pass('booted')
+    })
+})