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'use strict';
module.exports = function (trimEnd, t) {
t.test('normal cases', function (st) {
st.equal(trimEnd(' \t\na \t\n'), ' \t\na', 'strips whitespace off the left side');
st.equal(trimEnd('a'), 'a', 'noop when no whitespace');
var allWhitespaceChars = '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
st.equal(trimEnd(allWhitespaceChars + 'a' + allWhitespaceChars), allWhitespaceChars + 'a', 'all expected whitespace chars are trimmed');
st.end();
});
// see https://codeblog.jonskeet.uk/2014/12/01/when-is-an-identifier-not-an-identifier-attack-of-the-mongolian-vowel-separator/
var mongolianVowelSeparator = '\u180E';
t.test('unicode >= 4 && < 6.3', { skip: !(/^\s$/).test(mongolianVowelSeparator) }, function (st) {
st.equal(trimEnd(mongolianVowelSeparator + 'a' + mongolianVowelSeparator), mongolianVowelSeparator + 'a', 'mongolian vowel separator is whitespace');
st.end();
});
t.test('zero-width spaces', function (st) {
var zeroWidth = '\u200b';
st.equal(trimEnd(zeroWidth), zeroWidth, 'zero width space does not trim');
st.end();
});
};
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