});
});
describe("->reduce()", function () {
it("reduces a collection down to a single value", function () {
$collection = new Collection(['data' => [1, 2, 3]]);
$filter = function ($memo, $item) {
return $memo + $item;
};
expect($collection->reduce($filter, 0))->toBe(6);
expect($collection->reduce($filter, 1))->toBe(7);
});
});
describe("->slice()", function () {
it("extracts a slice of items", function () {
$collection = new Collection(['data' => [1, 2, 3, 4, 5]]);
$result = $collection->slice(2, 2);
expect($result)->not->toBe($collection);
expect($result->data())->toBe([3, 4]);
});
});
describe("->sort()", function () {
it("sorts a collection", function () {
$collection = new Collection(['data' => [5, 3, 4, 1, 2]]);
$result = $collection->sort();
expect($result->data())->toBe([1, 2, 3, 4, 5]);
});
it("sorts a collection using a compare function", function () {
$collection = new Collection(['data' => ['Alan', 'Dave', 'betsy', 'carl']]);
$result = $collection->sort('strcasecmp');
expect($result->data())->toBe(['Alan', 'betsy', 'carl', 'Dave']);
});
