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/**
* Tests for numeric stability
*/
var algorithm = require('./')
, test = require('tape')
, badVector
badVector = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7]
test('fastSum', function (t) {
t.plan(1);
t.deepEqual(algorithm.fastTwoSum(1/3, 1/6)
, [0.5, -2.7755575615628914e-17, null]
, 'Result and error should have been returned')
});
test('nextPowerTwo', function (t) {
t.plan(1)
t.equal(algorithm.nextPowerTwo(1534)
, 2048
, 'Should be Math.pow(2, Math.ceil(algorithm.logBase2(Math.abs(1534))))')
})
test('accumulate', function (t) {
t.plan(5)
t.equal(algorithm([1,2,3,4]), 10, 'Integer sum should work')
t.equal(algorithm.dumbSum(badVector), 15.299999999999999, 'Inaccurate summation using naive method')
t.equal(algorithm(badVector), 15.3, 'Rump-Ogita-Oishi summation of insidious sum')
t.equal(algorithm([0, 0, 0]), 0, 'Rump-Ogita-Oishi summation of zero array')
t.equal(algorithm([]), 0, 'Rump-Ogita-Oishi summation of empty array')
})