import test from 'ava';

import Data from '../src/data';
import Datum from './datum.mock';

test('Data can be empty', t => {
  let d = new Data();
  t.is(d.data.length, 0);
});

test('Data can be initialized', t => {
  let d = new Data([Datum()]);
  t.is(d.data.length, 1);
});

test('Data can be explicitly set', t => {
  let d = new Data();
  t.is(d.data.length, 0);
  d.data = [Datum()];
  t.is(d.data.length, 1);
});

test('Data can be filtered', t => {
  let data = [Datum()];
  let d = new Data(data);
  let filtered = d.filter();
  t.deepEqual(d.data, filtered);
  filtered = d.filter([datum => datum.from[0].name === data[0].from[0].name]);
  t.deepEqual(d.data, filtered);
  filtered = d.filter([() => false]);
  t.is(filtered.length, 0);
  t.is(d.data.length, 0);
});