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describe('core - one()', function() {
let table;
dt.libs({
js: ['jquery', 'datatables'],
css: ['datatables']
});
describe('Check the defaults', function() {
dt.html('basic');
it('Exists and is a function', function() {
let table = $('#example').DataTable();
expect(typeof table.one).toBe('function');
});
dt.html('basic');
it('Setter returns an API instance', function() {
let table = $('#example').DataTable();
expect(table.one('draw.dt', function() {}) instanceof $.fn.dataTable.Api).toBe(true);
});
dt.html('basic');
it('Correct args sent to the listener', function() {
let table = $('#example').DataTable();
table.one('draw.dt', function(e, arg) {
expect(e instanceof $.Event).toBe(true);
expect(typeof arg).toBe('object');
});
table.page(1).draw(false);
});
});
// TK COLIN: cut&paste pretty much from on(), could tidy up later
function checkEvents(events, triggerCount, expectedCount) {
let drawPass = 0;
let pagePass = 0;
let table = $('#example').DataTable();
let lastColumn = table.columns().count();
table.one(events, function(e) {
if (e.type == 'draw') {
drawPass++;
} else if (e.type == 'page') {
pagePass++;
}
});
// start at column 1 as that'll trigger the first event, and loop when reach end of columns
for (let i = 0, col = 1; i < triggerCount; i++, col++) {
table.page(col).draw(false);
if (col == lastColumn) col = 0;
}
return drawPass + pagePass == expectedCount;
}
describe('Check the event listening', function() {
dt.html('basic');
it('.dt name space is automatically added when using `on`', function() {
expect(checkEvents('draw', 1, 1)).toBe(true);
});
dt.html('basic');
it('Name space can be passed in manually', function() {
expect(checkEvents('draw.dt', 1, 1)).toBe(true);
});
dt.html('basic');
it('Single event wont trigger multiple times', function() {
expect(checkEvents('draw.dt', 3, 1)).toBe(true);
});
dt.html('basic');
it('Single event does not trigger if not listened to', function() {
expect(checkEvents('length.dt', 1, 0)).toBe(true);
});
dt.html('basic');
it('Multiple events can be subscribed without manual namespaces', function() {
expect(checkEvents('draw page', 1, 2)).toBe(true);
});
dt.html('basic');
it('Multiple events can be subscribed with manual namespaces', function() {
expect(checkEvents('draw.dt page.dt', 1, 2)).toBe(true);
});
dt.html('basic');
it('Multiple events trigger multiple times', function() {
expect(checkEvents('draw.dt page.dt', 10, 2)).toBe(true);
});
});
});
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