vis.js is a dynamic, browser-based visualization library
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var assert = require('assert'),
moment = require('moment'),
vis = require('../vis.js'),
DataSet = vis.DataSet;
var now = new Date();
var data = new DataSet({
convert: {
start: 'Date',
end: 'Date'
}
});
// add single items with different date types
data.add({id: 1, content: 'Item 1', start: new Date(now.valueOf())});
data.add({id: 2, content: 'Item 2', start: now.toISOString()});
data.add([
//{id: 3, content: 'Item 3', start: moment(now)}, // TODO: moment fails, not the same instance
{id: 3, content: 'Item 3', start: now},
{id: 4, content: 'Item 4', start: '/Date(' + now.valueOf() + ')/'}
]);
var items = data.get();
assert.equal(items.length, 4);
items.forEach(function (item) {
assert.ok(item.start instanceof Date);
});
// get filtered fields only
var sort = function (a, b) {
return a.id > b.id;
};
assert.deepEqual(data.get({
fields: ['id', 'content']
}).sort(sort), [
{id: 1, content: 'Item 1'},
{id: 2, content: 'Item 2'},
{id: 3, content: 'Item 3'},
{id: 4, content: 'Item 4'}
]);
// convert dates
assert.deepEqual(data.get({
fields: ['id', 'start'],
convert: {start: 'Number'}
}).sort(sort), [
{id: 1, start: now.valueOf()},
{id: 2, start: now.valueOf()},
{id: 3, start: now.valueOf()},
{id: 4, start: now.valueOf()}
]);
// get a single item
assert.deepEqual(data.get(1, {
fields: ['id', 'start'],
convert: {start: 'ISODate'}
}), {
id: 1,
start: now.toISOString()
});
// remove an item
data.remove(2);
assert.deepEqual(data.get({
fields: ['id']
}).sort(sort), [
{id: 1},
{id: 3},
{id: 4}
]);
// add an item
data.add({id: 5, content: 'Item 5', start: now.valueOf()});
assert.deepEqual(data.get({
fields: ['id']
}).sort(sort), [
{id: 1},
{id: 3},
{id: 4},
{id: 5}
]);
// update an item
data.update({id: 5, content: 'changed!'}); // update item (extend existing fields)
data.remove(3); // remove existing item
data.add({id: 3, other: 'bla'}); // add new item
data.update({id: 6, content: 'created!', start: now.valueOf()}); // this item is not yet existing, create it
assert.deepEqual(data.get().sort(sort), [
{id: 1, content: 'Item 1', start: now},
{id: 3, other: 'bla'},
{id: 4, content: 'Item 4', start: now},
{id: 5, content: 'changed!', start: now},
{id: 6, content: 'created!', start: now}
]);
data.clear();
assert.equal(data.get().length, 0);
// test filtering and sorting
data = new vis.DataSet();
data.add([
{id:1, age: 30, group: 2},
{id:2, age: 25, group: 4},
{id:3, age: 17, group: 2},
{id:4, age: 27, group: 3}
]);
assert.deepEqual(data.get({order: 'age'}), [
{id:3, age: 17, group: 2},
{id:2, age: 25, group: 4},
{id:4, age: 27, group: 3},
{id:1, age: 30, group: 2}
]);
assert.deepEqual(data.getIds({order: 'age'}), [3,2,4,1]);
assert.deepEqual(data.get({order: 'age', fields: ['id']}), [
{id:3},
{id:2},
{id:4},
{id:1}
]);
assert.deepEqual(data.get({
order: 'age',
filter: function (item) {
return item.group == 2;
},
fields: ['id']
}), [
{id:3},
{id:1}
]);
assert.deepEqual(data.getIds({
order: 'age',
filter: function (item) {
return (item.group == 2);
}
}), [3,1]);
// TODO: extensively test DataSet