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Copy pathindex.js
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56 lines (50 loc) · 1.65 KB
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var test = require('../util/test')(__filename);
var split = require('../../packages/array-split');
test('should return empty array if empty array is passed as first arg', function(t) {
t.plan(3);
t.deepEqual(split([]), []);
t.deepEqual(split([], 4), []);
t.deepEqual(split([], null), []);
t.end();
});
test('if only array is passed as argument, treat n as the length of array', function(t) {
t.plan(2);
t.deepEqual(split([1, 2, 3, 4, 5, 6, 7, 8, 9]), [[1, 2, 3, 4, 5, 6, 7, 8, 9]]);
t.deepEqual(split([100, 100, 100, 200, 300, 400]), [[100, 100, 100, 200, 300, 400]]);
t.end();
});
test('splits array into groups of n size if array length divisible by n', function(t) {
t.plan(2);
t.deepEqual(split([1, 2, 3, 4, 5, 6, 7, 8, 9], 3), [[1, 2, 3], [4, 5, 6], [7, 8, 9]]);
t.deepEqual(split([100, 100, 100, 200, 300, 400], 2), [[100, 100], [100, 200], [300, 400]]);
t.end();
});
test('splits array into groups of n size plus a trailing array of length < n', function(t) {
t.plan(2);
t.deepEqual(split([1, 2, 3, 4, 5, 6, 7, 8, 9], 2), [[1, 2], [3, 4], [5, 6], [7, 8], [9]]);
t.deepEqual(split([100, 100, 100, 200, 300, 400], 4), [[100, 100, 100, 200], [300, 400]]);
t.end();
});
test('throws if first argument is not an array', function(t) {
t.plan(3);
t.throws(function() {
split(undefined, 2);
});
t.throws(function() {
split(null, 4);
});
t.throws(function() {
split({}, 3);
});
t.end();
});
test('throws if second argument is not null/undefined or a number', function(t) {
t.plan(2);
t.throws(function() {
split([1, 2, 3, 4], '2');
});
t.throws(function() {
split([1, 2, 3, 4], {});
});
t.end();
});