add hw2

node_modules/pino/test/browser-child.test.js

@@ -0,0 +1,106 @@
+'use strict'
+const test = require('tape')
+const pino = require('../browser')
+
+test('child has parent level', ({ end, same, is }) => {
+  const instance = pino({
+    level: 'error',
+    browser: {}
+  })
+
+  const child = instance.child({})
+
+  same(child.level, instance.level)
+  end()
+})
+
+test('changing child level does not affect parent', ({ end, same, is }) => {
+  const instance = pino({
+    level: 'error',
+    browser: {}
+  })
+
+  const child = instance.child({})
+  child.level = 'info'
+
+  same(instance.level, 'error')
+  end()
+})
+
+test('child should log, if its own level allows it', ({ end, same, is }) => {
+  const expected = [
+    {
+      level: 30,
+      msg: 'this is info'
+    },
+    {
+      level: 40,
+      msg: 'this is warn'
+    },
+    {
+      level: 50,
+      msg: 'this is an error'
+    }
+  ]
+  const instance = pino({
+    level: 'error',
+    browser: {
+      write (actual) {
+        checkLogObjects(is, same, actual, expected.shift())
+      }
+    }
+  })
+
+  const child = instance.child({})
+  child.level = 'info'
+
+  child.debug('this is debug')
+  child.info('this is info')
+  child.warn('this is warn')
+  child.error('this is an error')
+
+  same(expected.length, 0, 'not all messages were read')
+  end()
+})
+
+test('changing child log level should not affect parent log behavior', ({ end, same, is }) => {
+  const expected = [
+    {
+      level: 50,
+      msg: 'this is an error'
+    },
+    {
+      level: 60,
+      msg: 'this is fatal'
+    }
+  ]
+  const instance = pino({
+    level: 'error',
+    browser: {
+      write (actual) {
+        checkLogObjects(is, same, actual, expected.shift())
+      }
+    }
+  })
+
+  const child = instance.child({})
+  child.level = 'info'
+
+  instance.warn('this is warn')
+  instance.error('this is an error')
+  instance.fatal('this is fatal')
+
+  same(expected.length, 0, 'not all messages were read')
+  end()
+})
+
+function checkLogObjects (is, same, actual, expected) {
+  is(actual.time <= Date.now(), true, 'time is greater than Date.now()')
+
+  const actualCopy = Object.assign({}, actual)
+  const expectedCopy = Object.assign({}, expected)
+  delete actualCopy.time
+  delete expectedCopy.time
+
+  same(actualCopy, expectedCopy)
+}