filer/perf/simple-statistics/test/factorial.test.js

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2014-12-16 23:53:29 +00:00
var test = require('tape');
var ss = require('../');
test('factorial', function(t) {
test('can return null given a negative number', function(t) {
t.equal(null, ss.factorial(-1));
t.end();
});
test('can calculate 0! = 1', function(t) {
t.equal(ss.factorial(0), 1);
t.end();
});
test('can calculate 1! = 1', function(t) {
t.equal(ss.factorial(1), 1);
t.end();
});
test('can calculate 100! = 1', function(t) {
t.equal(ss.factorial(100), 9.33262154439441e+157);
t.end();
});
t.end();
});