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test/helper.js

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+'use strict'
+
+// This file contains code that we reuse
+// between our tests.
+
+const { build: buildApplication } = require('fastify-cli/helper')
+const path = require('node:path')
+const AppPath = path.join(__dirname, '..', 'app.js')
+
+// Fill in this config with all the configurations
+// needed for testing the application
+function config () {
+  return {}
+}
+
+// automatically build and tear down our instance
+async function build (t) {
+  // you can set all the options supported by the fastify CLI command
+  const argv = [AppPath]
+
+  // fastify-plugin ensures that all decorators
+  // are exposed for testing purposes, this is
+  // different from the production setup
+  const app = await buildApplication(argv, config())
+
+  // close the app after we are done
+  t.after(() => app.close())
+
+  return app
+}
+
+module.exports = {
+  config,
+  build
+}

test/plugins/support.test.js

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+'use strict'
+
+const { test } = require('node:test')
+const assert = require('node:assert')
+
+const Fastify = require('fastify')
+const Support = require('../../plugins/support')
+
+test('support works standalone', async (t) => {
+  const fastify = Fastify()
+  fastify.register(Support)
+
+  await fastify.ready()
+  assert.equal(fastify.someSupport(), 'hugs')
+})
+
+// You can also use plugin with opts in fastify v2
+//
+// test('support works standalone', (t) => {
+//   t.plan(2)
+//   const fastify = Fastify()
+//   fastify.register(Support)
+//
+//   fastify.ready((err) => {
+//     t.error(err)
+//     assert.equal(fastify.someSupport(), 'hugs')
+//   })
+// })

test/routes/example.test.js

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+'use strict'
+
+const { test } = require('node:test')
+const assert = require('node:assert')
+const { build } = require('../helper')
+
+test('example is loaded', async (t) => {
+  const app = await build(t)
+
+  const res = await app.inject({
+    url: '/example'
+  })
+  assert.equal(res.payload, 'this is an example')
+})
+
+// inject callback style:
+//
+// test('example is loaded', (t) => {
+//   t.plan(2)
+//   const app = await build(t)
+//
+//   app.inject({
+//     url: '/example'
+//   }, (err, res) => {
+//     t.error(err)
+//     assert.equal(res.payload, 'this is an example')
+//   })
+// })

test/routes/root.test.js

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+'use strict'
+
+const { test } = require('node:test')
+const assert = require('node:assert')
+const { build } = require('../helper')
+
+test('default root route', async (t) => {
+  const app = await build(t)
+
+  const res = await app.inject({
+    url: '/'
+  })
+  assert.deepStrictEqual(JSON.parse(res.payload), { root: true })
+})
+
+// inject callback style:
+//
+// test('default root route', (t) => {
+//   t.plan(2)
+//   const app = await build(t)
+//
+//   app.inject({
+//     url: '/'
+//   }, (err, res) => {
+//     t.error(err)
+//     assert.deepStrictEqual(JSON.parse(res.payload), { root: true })
+//   })
+// })