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// Flags: --expose-internals
'use strict';
const common = require('../common');
const {
hijackStdout,
restoreStdout,
} = require('../common/hijackstdio');
const assert = require('assert');
const errors = require('internal/errors');
// Turn off ANSI color formatting for this test file.
const { inspect } = require('util');
inspect.defaultOptions.colors = false;
errors.E('TEST_ERROR_1', 'Error for testing purposes: %s',
Error, TypeError, RangeError);
errors.E('TEST_ERROR_2', (a, b) => `${a} ${b}`, Error);
{
const err = new errors.codes.TEST_ERROR_1('test');
assert(err instanceof Error);
assert.strictEqual(err.name, 'Error');
assert.strictEqual(err.message, 'Error for testing purposes: test');
assert.strictEqual(err.code, 'TEST_ERROR_1');
}
{
const err = new errors.codes.TEST_ERROR_1.TypeError('test');
assert(err instanceof TypeError);
assert.strictEqual(err.name, 'TypeError');
assert.strictEqual(err.message, 'Error for testing purposes: test');
assert.strictEqual(err.code, 'TEST_ERROR_1');
}
{
const err = new errors.codes.TEST_ERROR_1.RangeError('test');
assert(err instanceof RangeError);
assert.strictEqual(err.name, 'RangeError');
assert.strictEqual(err.message, 'Error for testing purposes: test');
assert.strictEqual(err.code, 'TEST_ERROR_1');
}
{
const err = new errors.codes.TEST_ERROR_2('abc', 'xyz');
assert(err instanceof Error);
assert.strictEqual(err.name, 'Error');
assert.strictEqual(err.message, 'abc xyz');
assert.strictEqual(err.code, 'TEST_ERROR_2');
}
{
common.expectsInternalAssertion(
() => new errors.codes.TEST_ERROR_1(),
'Code: TEST_ERROR_1; The provided arguments ' +
'length (0) does not match the required ones (1).'
);
}
// Tests for common.expectsError
common.expectsError(() => {
throw new errors.codes.TEST_ERROR_1.TypeError('a');
}, { code: 'TEST_ERROR_1' });
common.expectsError(() => {
throw new errors.codes.TEST_ERROR_1.TypeError('a');
}, { code: 'TEST_ERROR_1',
type: TypeError,
message: /^Error for testing/ });
common.expectsError(() => {
throw new errors.codes.TEST_ERROR_1.TypeError('a');
}, { code: 'TEST_ERROR_1', type: TypeError });
common.expectsError(() => {
throw new errors.codes.TEST_ERROR_1.TypeError('a');
}, {
code: 'TEST_ERROR_1',
type: TypeError,
message: 'Error for testing purposes: a'
});
// Test that `code` property is mutable and that changing it does not change the
// name.
{
const myError = new errors.codes.TEST_ERROR_1('foo');
assert.strictEqual(myError.code, 'TEST_ERROR_1');
assert.strictEqual(myError.hasOwnProperty('code'), true);
assert.strictEqual(myError.hasOwnProperty('name'), false);
assert.deepStrictEqual(Object.keys(myError), ['code']);
const initialName = myError.name;
myError.code = 'FHQWHGADS';
assert.strictEqual(myError.code, 'FHQWHGADS');
assert.strictEqual(myError.name, initialName);
assert.deepStrictEqual(Object.keys(myError), ['code']);
assert.ok(!myError.name.includes('TEST_ERROR_1'));
assert.ok(!myError.name.includes('FHQWHGADS'));
}
// Test that `name` is mutable and that changing it alters `toString()` but not
// `console.log()` results, which is the behavior of `Error` objects in the
// browser. Note that `name` becomes enumerable after being assigned.
{
const myError = new errors.codes.TEST_ERROR_1('foo');
assert.deepStrictEqual(Object.keys(myError), ['code']);
const initialToString = myError.toString();
myError.name = 'Fhqwhgads';
assert.deepStrictEqual(Object.keys(myError), ['code', 'name']);
assert.notStrictEqual(myError.toString(), initialToString);
}
// Test that `message` is mutable and that changing it alters `toString()` but
// not `console.log()` results, which is the behavior of `Error` objects in the
// browser. Note that `message` remains non-enumerable after being assigned.
{
let initialConsoleLog = '';
hijackStdout((data) => { initialConsoleLog += data; });
const myError = new errors.codes.TEST_ERROR_1('foo');
assert.deepStrictEqual(Object.keys(myError), ['code']);
const initialToString = myError.toString();
console.log(myError);
assert.notStrictEqual(initialConsoleLog, '');
restoreStdout();
let subsequentConsoleLog = '';
hijackStdout((data) => { subsequentConsoleLog += data; });
myError.message = 'Fhqwhgads';
assert.deepStrictEqual(Object.keys(myError), ['code']);
assert.notStrictEqual(myError.toString(), initialToString);
console.log(myError);
assert.strictEqual(subsequentConsoleLog, initialConsoleLog);
restoreStdout();
}
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