chore: add transports example (#851)

examples/transports/test-3.js

@@ -0,0 +1,41 @@
+'use strict'
+
+const path = require('path')
+const execa = require('execa')
+const pDefer = require('p-defer')
+const uint8ArrayToString = require('uint8arrays/to-string')
+
+async function test () {
+  const deferNode1 = pDefer()
+  const deferNode2 = pDefer()
+  const deferNode3 = pDefer()
+
+  process.stdout.write('3.js\n')
+
+  const proc = execa('node', [path.join(__dirname, '3.js')], {
+    cwd: path.resolve(__dirname),
+    all: true
+  })
+
+  proc.all.on('data', async (data) => {
+    process.stdout.write(data)
+    const line = uint8ArrayToString(data)
+
+    if (line.includes('node 1 dialed to node 2 successfully')) {
+      deferNode1.resolve()
+    } else if (line.includes('node 2 dialed to node 3 successfully')) {
+      deferNode2.resolve()
+    } else if (line.includes('node 3 failed to dial to node 1 with:')) {
+      deferNode3.resolve()
+    }
+  })
+
+  await Promise.all([
+    deferNode1.promise,
+    deferNode2.promise,
+    deferNode3.promise
+  ])
+  proc.kill()
+}
+
+module.exports = test