Node中自动化测试断言包assert的方法说明

最新推荐文章于 2025-03-16 20:42:50 发布

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最新推荐文章于 2025-03-16 20:42:50 发布

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本文详细介绍了Node.js中的Assert断言模块，包括各种断言方法如assert.fail、assert.ok、assert.equal等的使用方法及应用场景。这些方法用于编写应用的单元测试，确保代码按预期运行。

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Assent 断言模板包含如下方法:

assert.fail(actual, expected, message, operator)

assert.ok(value, [message])

assert.equal(actual, expected, [message])

assert.notEqual(actual, expected, [message])
assert.deepEqual(actual, expected, [message])
assert.notDeepEqual(actual, expected, [message])
assert.strictEqual(actual, expected, [message])
assert.notStrictEqual(actual, expected, [message])
assert.throws(block, [error], [message])
assert.doesNotThrow(block, [error], [message])
assert.ifError(value)

Assert 断言模块
This module is used for writing unit tests for your applications, you can access it with require('assert').
断言（Assert）模块用于为应用编写单元测试，可以通过require('assert')对该模块进行调用。

assert.fail(actual, expected, message, operator)
Tests if actual is equal to expected using the operator provided.
使用指定操作符测试actual（真实值）是否和expected（期望值）一致。

assert.ok(value, [message])
Tests if value is a true value, it is equivalent to assert.equal(true, value, message);
测试实际值是否为true，和assert.equal(true, value, message);作用一致

assert.equal(actual, expected, [message])
Tests shallow, coercive equality with the equal comparison operator ( == ).
使用等值比较操作符( == )测试真实值是否浅层地（shallow），强制性地（coercive）和预期值相等。

assert.notEqual(actual, expected, [message])
Tests shallow, coercive non-equality with the not equal comparison operator ( != ).
使用不等比较操作符( != )测试真实值是否浅层地（shallow），强制性地（coercive）和预期值不相等。

assert.deepEqual(actual, expected, [message])
Tests for deep equality.
测试真实值是否深层次地和预期值相等。

assert.notDeepEqual(actual, expected, [message])
Tests for any deep inequality.
测试真实值是否深层次地和预期值不相等。

assert.strictEqual(actual, expected, [message])
Tests strict equality, as determined by the strict equality operator ( === )
使用严格相等操作符 ( === )测试真实值是否严格地（strict）和预期值相等。

assert.notStrictEqual(actual, expected, [message])
Tests strict non-equality, as determined by the strict not equal operator ( !== )
使用严格不相等操作符 ( !== )测试真实值是否严格地（strict）和预期值不相等。

assert.throws(block, [error], [message])
Expects block to throw an error. error can be constructor, regexp or validation function.
预期block时抛出一个错误（error）， error可以为构造函数，正则表达式或者其他验证器。

assert.doesNotThrow(block, [error], [message])
Expects block not to throw an error, see assert.throws for details.
预期block时不抛出错误，详细信息请见assert.throws。

assert.ifError(value)
Tests if value is not a false value, throws if it is a true value. Useful when testing the first argument, error in callbacks.
测试值是否不为false，当为true时抛出。常用于回调中第一个参数error的测试。