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describe('core - events - length', function() {
dt.libs({
js: ['jquery', 'datatables'],
css: ['datatables']
});
let table;
let params;
describe('Check the defaults', function() {
dt.html('basic');
it('Called before the draw', function() {
let lastCell;
table = $('#example').DataTable();
table.on('length.dt', function() {
params = arguments;
lastCell = $('tbody tr:last td:eq(0)').text();
});
table.page.len(25).draw(false);
expect(lastCell).toBe('Cedric Kelly');
expect($('tbody tr:last td:eq(0)').text()).toBe('Hope Fuentes');
});
it('Called with expected parameters', function() {
expect(params.length).toBe(3);
expect(params[0] instanceof $.Event).toBe(true);
expect(params[1]).toBe(table.settings()[0]);
expect(typeof params[2]).toBe('number');
});
});
describe('Functional tests', function() {
let count = 0;
let length;
dt.html('basic');
it('Not called on initial draw', function() {
table = $('#example')
.on('length.dt', function() {
count++;
length = arguments[2];
})
.DataTable();
expect(count).toBe(0);
});
it('Not called when API changes page', function() {
table.page(2).draw(false);
expect(count).toBe(0);
});
it('Called when API changes page length', function() {
table.page.len(25).draw(false);
expect(count).toBe(1);
expect(length).toBe(25);
});
it('Not called when user changes page', function() {
$('span a.paginate_button:eq(1)').click();
expect(count).toBe(1);
});
it('Called when user changes page length', function() {
$('div.dataTables_length select')
.val(10)
.change();
expect(count).toBe(2);
expect(length).toBe(10);
});
});
});
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