new assert.AssertionError(options)

• options <Object>

  • message <string> 如果提供,则错误消息将设置为此值。

    \message <string> If provided, the error message is set to this value.

  • actual <any> 错误实例上的 actual 属性。

    \actual <any> The actual property on the error instance.

  • expected <any> 错误实例上的 expected 属性。

    \expected <any> The expected property on the error instance.

  • operator <string> 错误实例上的 operator 属性。

    \operator <string> The operator property on the error instance.

  • stackStartFn <Function> 如果提供,则生成的堆栈跟踪将省略此函数之前的帧。

    \stackStartFn <Function> If provided, the generated stack trace omits frames before this function.

Error 的子类,表示断言的失败。

\A subclass of Error that indicates the failure of an assertion.

所有实例都包含内置的 Error 属性(message 和 name),以及:

\All instances contain the built-in Error properties (message and name) and:

• actual <any> 对于 assert.strictEqual() 等方法,设置为 actual 参数。

  \actual <any> Set to the actual argument for methods such as assert.strictEqual().

• expected <any> 对于 assert.strictEqual() 等方法,设置为 expected 值。

  \expected <any> Set to the expected value for methods such as assert.strictEqual().

• generatedMessage <boolean> 指示消息是否是自动生成的 (true)。

  \generatedMessage <boolean> Indicates if the message was auto-generated (true) or not.

• code <string> 值始终为 ERR_ASSERTION,以表明该错误是断言错误。

  \code <string> Value is always ERR_ASSERTION to show that the error is an assertion error.

• operator <string> 设置为传入的运算符值。

  \operator <string> Set to the passed in operator value.

import assert from 'node:assert';
// Generate an AssertionError to compare the error message later:
const { message } = new assert.AssertionError({
 actual: 1,
 expected: 2,
 operator: 'strictEqual',
});
// Verify error output:
try {
 assert.strictEqual(1, 2);
} catch (err) {
 assert(err instanceof assert.AssertionError);
 assert.strictEqual(err.message, message);
 assert.strictEqual(err.name, 'AssertionError');
 assert.strictEqual(err.actual, 1);
 assert.strictEqual(err.expected, 2);
 assert.strictEqual(err.code, 'ERR_ASSERTION');
 assert.strictEqual(err.operator, 'strictEqual');
 assert.strictEqual(err.generatedMessage, true);
}const assert = require('node:assert');
// Generate an AssertionError to compare the error message later:
const { message } = new assert.AssertionError({
 actual: 1,
 expected: 2,
 operator: 'strictEqual',
});
// Verify error output:
try {
 assert.strictEqual(1, 2);
} catch (err) {
 assert(err instanceof assert.AssertionError);
 assert.strictEqual(err.message, message);
 assert.strictEqual(err.name, 'AssertionError');
 assert.strictEqual(err.actual, 1);
 assert.strictEqual(err.expected, 2);
 assert.strictEqual(err.code, 'ERR_ASSERTION');
 assert.strictEqual(err.operator, 'strictEqual');
 assert.strictEqual(err.generatedMessage, true);
}拷贝