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Node.js assert.ok() 方法

❮ Assert 模块


示例

如果表达式计算结果为 0 或 false,则会抛出错误并终止程序

var assert = require('assert');
assert.ok(50 > 70);
运行示例 »

定义和用法

assert.ok() 方法测试给定表达式是否为真。

如果表达式的计算结果为 0 或 false,则会引发断言失败,并终止程序。


语法

 assert.ok(表达式, 消息);

参数值

参数 描述
expression 必需。指定要计算的表达式
message 可选。指定要分配给 AssertionError 的错误消息。如果省略,则分配默认消息

技术细节

返回值
Node.js 版本 0.1.21

更多示例

示例

使用 message 参数

var assert = require('assert');
assert.ok(50 > 70, "我的消息在这里");
运行示例 »

示例

如果表达式的计算结果为 0,assert.ok() 方法也会抛出错误

var assert = require('assert');
assert.ok(50 - 50);
运行示例 »

❮ Assert 模块

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