add hw2

node_modules/pino-abstract-transport/test/fixtures/transport-transform.js

@@ -0,0 +1,24 @@
+'use strict'
+
+const { Transform, pipeline } = require('stream')
+const build = require('../..')
+
+module.exports = function (threadStreamOpts) {
+  const { opts = {} } = threadStreamOpts
+  return build(function (source) {
+    const transform = new Transform({
+      objectMode: true,
+      autoDestroy: true,
+      transform (chunk, enc, cb) {
+        chunk.service = 'from transform'
+        chunk.level = `${source.levels.labels[chunk.level]}(${chunk.level})`
+        chunk[source.messageKey] = chunk[source.messageKey].toUpperCase()
+        cb(null, JSON.stringify(chunk) + '\n')
+      }
+    })
+
+    pipeline(source, transform, () => {})
+
+    return transform
+  }, { ...opts, enablePipelining: true })
+}