31 lines
1.3 KiB
JavaScript
Executable file
31 lines
1.3 KiB
JavaScript
Executable file
'use strict';
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var testArray = function testArray(t, actual, expected, msg) {
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t.deepEqual(actual, expected, msg);
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t.equal(actual.length, expected.length, 'expected ' + expected.length + ', got ' + actual.length);
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};
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module.exports = function (flat, t) {
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t.test('flattens', function (st) {
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testArray(st, flat([1, [2], [[3]], [[['four']]]]), [1, 2, [3], [['four']]], 'missing depth only flattens 1 deep');
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testArray(st, flat([1, [2], [[3]], [[['four']]]], 1), [1, 2, [3], [['four']]], 'depth of 1 only flattens 1 deep');
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st.notDeepEqual(flat([1, [2], [[3]], [[['four']]]], 1), [1, 2, 3, ['four']], 'depth of 1 only flattens 1 deep: sanity check');
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testArray(st, flat([1, [2], [[3]], [[['four']]]], 2), [1, 2, 3, ['four']], 'depth of 2 only flattens 2 deep');
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st.notDeepEqual(flat([1, [2], [[3]], [[['four']]]], 2), [1, 2, 3, 'four'], 'depth of 2 only flattens 2 deep: sanity check');
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testArray(st, flat([1, [2], [[3]], [[['four']]]], 3), [1, 2, 3, 'four'], 'depth of 3 only flattens 3 deep');
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testArray(st, flat([1, [2], [[3]], [[['four']]]], Infinity), [1, 2, 3, 'four'], 'depth of Infinity flattens all the way');
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st.end();
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});
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t.test('sparse arrays', function (st) {
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// eslint-disable-next-line no-sparse-arrays
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st.deepEqual(flat([, [1]]), flat([[], [1]]), 'an array hole is treated the same as an empty array');
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st.end();
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});
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};
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