add hw2

node_modules/pino/test/metadata.test.js

@@ -0,0 +1,106 @@
+'use strict'
+
+const os = require('os')
+const { test } = require('tap')
+const pino = require('../')
+
+const { pid } = process
+const hostname = os.hostname()
+
+test('metadata works', async ({ ok, same, equal }) => {
+  const now = Date.now()
+  const instance = pino({}, {
+    [Symbol.for('pino.metadata')]: true,
+    write (chunk) {
+      equal(instance, this.lastLogger)
+      equal(30, this.lastLevel)
+      equal('a msg', this.lastMsg)
+      ok(Number(this.lastTime) >= now)
+      same(this.lastObj, { hello: 'world' })
+      const result = JSON.parse(chunk)
+      ok(new Date(result.time) <= new Date(), 'time is greater than Date.now()')
+      delete result.time
+      same(result, {
+        pid,
+        hostname,
+        level: 30,
+        hello: 'world',
+        msg: 'a msg'
+      })
+    }
+  })
+
+  instance.info({ hello: 'world' }, 'a msg')
+})
+
+test('child loggers works', async ({ ok, same, equal }) => {
+  const instance = pino({}, {
+    [Symbol.for('pino.metadata')]: true,
+    write (chunk) {
+      equal(child, this.lastLogger)
+      equal(30, this.lastLevel)
+      equal('a msg', this.lastMsg)
+      same(this.lastObj, { from: 'child' })
+      const result = JSON.parse(chunk)
+      ok(new Date(result.time) <= new Date(), 'time is greater than Date.now()')
+      delete result.time
+      same(result, {
+        pid,
+        hostname,
+        level: 30,
+        hello: 'world',
+        from: 'child',
+        msg: 'a msg'
+      })
+    }
+  })
+
+  const child = instance.child({ hello: 'world' })
+  child.info({ from: 'child' }, 'a msg')
+})
+
+test('without object', async ({ ok, same, equal }) => {
+  const instance = pino({}, {
+    [Symbol.for('pino.metadata')]: true,
+    write (chunk) {
+      equal(instance, this.lastLogger)
+      equal(30, this.lastLevel)
+      equal('a msg', this.lastMsg)
+      same({ }, this.lastObj)
+      const result = JSON.parse(chunk)
+      ok(new Date(result.time) <= new Date(), 'time is greater than Date.now()')
+      delete result.time
+      same(result, {
+        pid,
+        hostname,
+        level: 30,
+        msg: 'a msg'
+      })
+    }
+  })
+
+  instance.info('a msg')
+})
+
+test('without msg', async ({ ok, same, equal }) => {
+  const instance = pino({}, {
+    [Symbol.for('pino.metadata')]: true,
+    write (chunk) {
+      equal(instance, this.lastLogger)
+      equal(30, this.lastLevel)
+      equal(undefined, this.lastMsg)
+      same({ hello: 'world' }, this.lastObj)
+      const result = JSON.parse(chunk)
+      ok(new Date(result.time) <= new Date(), 'time is greater than Date.now()')
+      delete result.time
+      same(result, {
+        pid,
+        hostname,
+        level: 30,
+        hello: 'world'
+      })
+    }
+  })
+
+  instance.info({ hello: 'world' })
+})