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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')
- })
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