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Copy pathindex.js
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57 lines (49 loc) · 1.53 KB
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var test = require('../util/test')(__filename);
var splitAt = require('../../packages/array-split-at');
test('splits array into two at a given position within the array bounds', function(t) {
t.deepEqual(splitAt([1, 2, 3, 4, 5], 2), [[1, 2], [3, 4, 5]]);
t.end();
});
test('splits array into two at a given position outside the array bounds', function(t) {
t.deepEqual(splitAt([1, 2, 3, 4, 5], 10), [[1, 2, 3, 4, 5], []]);
t.end();
});
test('splits array into two at a given negative position within the array bounds', function(t) {
t.deepEqual(splitAt([1, 2, 3, 4, 5], -1), [[1, 2, 3, 4], [5]]);
t.end();
});
test('splits array into two at a given negative position outside the array bounds', function(t) {
t.deepEqual(splitAt([1, 2, 3, 4, 5], -10), [[], [1, 2, 3, 4, 5]]);
t.end();
});
test('when no second argument, all elements go to second array', function(t) {
t.deepEqual(splitAt([1, 2, 3, 4, 5]), [[], [1, 2, 3, 4, 5]]);
t.end();
});
test('splits array into two at an empty array', function(t) {
t.deepEqual(splitAt([], 2), [[], []]);
t.end();
});
test('throws if first argument is not an array', function(t) {
t.plan(3);
t.throws(function() {
splitAt(undefined, 2);
});
t.throws(function() {
splitAt(null, 4);
});
t.throws(function() {
splitAt({}, 3);
});
t.end();
});
test('throws if second argument is not null/undefined or a number', function(t) {
t.plan(2);
t.throws(function() {
splitAt([1, 2, 3, 4], '2');
});
t.throws(function() {
splitAt([1, 2, 3, 4], {});
});
t.end();
});