// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

import { expect } from 'chai';

import { verboseRegExp } from '../../../client/common/utils/regexp';

suite('Utils for regular expressions - verboseRegExp()', () => {

test('whitespace removed in multiline pattern (example of typical usage)', () => {

const regex = verboseRegExp(`

^

(?:

spam \\b .*

) |

(?:

eggs \\b .*

)

$

`);

expect(regex.source).to.equal('^(?:spam\\b.*)|(?:eggs\\b.*)$', 'mismatch');

});

const whitespaceTests = [

['spam eggs', 'spameggs'],

[

`spam

eggs`,

'spameggs',

],

// empty

[' ', '(?:)'],

[

`

`,

'(?:)',

],

];

for (const [pat, expected] of whitespaceTests) {

test(`whitespace removed ("${pat}")`, () => {

const regex = verboseRegExp(pat);

expect(regex.source).to.equal(expected, 'mismatch');

});

}

const noopPatterns = ['^(?:spam\\b.*)$', 'spam', '^spam$', 'spam$', '^spam'];

for (const pat of noopPatterns) {

test(`pattern not changed ("${pat}")`, () => {

const regex = verboseRegExp(pat);

expect(regex.source).to.equal(pat, 'mismatch');

});

}

const emptyPatterns = [

'',

`

`,

' ',

];

for (const pat of emptyPatterns) {

test(`no pattern ("${pat}")`, () => {

const regex = verboseRegExp(pat);

expect(regex.source).to.equal('(?:)', 'mismatch');

});

}

});