引入assert
const assert = require('assert')
创建错误消息 AssertionError
调用:
interface O{
message<string>
actual<any>,
expected<any>,
operator<string>,
stackStartFn
}
new asset.AssertionError(options:O)
手动创建
// 创建
let message = new assert.AssertionError({
actual:1,
expected:2,
operator:'strictEqual'
})
console.log(message);
/* 输出:
{ AssertionError [ERR_ASSERTION]: 1 strictEqual 2
at new AssertionError (internal/errors.js:83:11)
at Object.<anonymous> (/STORE/node/hello-world.js:4:15)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)
at startup (bootstrap_node.js:191:16)
at bootstrap_node.js:612:3
generatedMessage: true,
name: 'AssertionError [ERR_ASSERTION]',
code: 'ERR_ASSERTION',
actual: 1,
expected: 2,
operator: 'strictEqual' }
*/
自动创建
try {
assert.strictEqual(1,2); // 程序报错时,自动创建错误
}catch(err){
console.log(err);
}
/* 输出:
{ AssertionError [ERR_ASSERTION]: 'a' === 'b'
at Object.<anonymous> (/STORE/node/hello-world.js:5:9)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)
at startup (bootstrap_node.js:191:16)
at bootstrap_node.js:612:3
generatedMessage: true,
name: 'AssertionError [ERR_ASSERTION]',
code: 'ERR_ASSERTION',
actual: 'a',
expected: 'b',
operator: '===' }
*/
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