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test.js
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/* eslint-env mocha */
/* eslint-disable no-multiple-lines */
'use strict';
const assert = require('assert');
const ml = require('.');
it('should support multiline comments', () => {
const actual = ml(() => {/*
<!doctype html>
<html>
<body>
<h1>Hello world!</h1>
</body>
</html>
*/});
const expected = '<!doctype html>\n<html>\n\t<body>\n\t\t<h1>Hello world!</h1>\n\t</body>\n</html>';
assert.equal(actual, expected);
});
it('should match when comment starts with `/*!`', () => {
const actual = ml(() => {/*!
foo
*/});
const expected = 'foo';
assert.equal(actual, expected);
});
it('should match when comment starts with `/*@preserve`', () => {
const actual = ml(() => {/*@preserve
foo
*/});
const expected = 'foo';
assert.equal(actual, expected);
});
it('should match when comment starts with `/*!@preserve`', () => {
const actual = ml(() => {/*!@preserve
foo
*/});
const expected = 'foo';
assert.equal(actual, expected);
});
it('should preserve leading empty lines', () => {
const actual = ml(() => {/*
foo
*/});
const expected = '\n\nfoo';
assert.equal(actual, expected);
});
it('should preserve trailing empty lines', () => {
const actual = ml(() => {/*
foo
*/});
const expected = 'foo\n\n';
assert.equal(actual, expected);
});
it('should throw if it can\'t match comment contents', () => {
assert.throws(() => {
ml(() => {});
});
assert.throws(() => {
ml(() => {/**/});
});
});
it('should be preserved when using Uglify', () => {
const uglify = require('uglify-js');
const fixture = 'const str=multiline(function(){/*!@preserve\n<!doctype html>\n*/\nconsole.log});';
const actual = uglify.minify(fixture, {
fromString: true,
output: {
comments: true
}
}).code;
assert.equal(actual, fixture);
});
describe('multiline.stripIndent()', () => {
it('should strip redundant leading whitespace', () => {
const actual = ml.stripIndent(() => {/*
<!doctype html>
<html>
<body>
<h1>Hello world!</h1>
</body>
</html>
*/});
const expected = '<!doctype html>\n<html>\n\n\t<body>\n\t\t<h1>Hello world!</h1>\n\t</body>\n</html>';
assert.equal(actual, expected);
});
it('should preserve leading empty lines', () => {
const actual = ml.stripIndent(() => {/*
foo
*/});
const expected = '\n\nfoo';
assert.equal(actual, expected);
});
it('should preserve trailing empty lines', () => {
const actual = ml.stripIndent(() => {/*
foo
*/});
const expected = 'foo\n\n';
assert.equal(actual, expected);
});
});