You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
1.2 KiB
73 lines
1.2 KiB
var assert = require('assert') |
|
var UINT64 = require('..').UINT64 |
|
|
|
describe('shiftLeft method', function () { |
|
|
|
describe('0<<1', function () { |
|
|
|
it('should return 0', function (done) { |
|
var u = UINT64(0).shiftLeft(1) |
|
|
|
assert.equal( u.toNumber(), 0 ) |
|
done() |
|
}) |
|
|
|
}) |
|
|
|
describe('1<<2', function () { |
|
|
|
it('should return 4', function (done) { |
|
var u = UINT64(1).shiftLeft(2) |
|
|
|
assert.equal( u.toNumber(), 4 ) |
|
done() |
|
}) |
|
|
|
}) |
|
|
|
describe('1<<16', function () { |
|
|
|
it('should return 2^16', function (done) { |
|
var n = Math.pow(2, 16) |
|
var u = UINT64(1).shiftLeft(16) |
|
|
|
assert.equal( u.toNumber(), n ) |
|
done() |
|
}) |
|
|
|
}) |
|
|
|
describe('1<<32', function () { |
|
|
|
it('should return 0', function (done) { |
|
var u = UINT64(1).shiftLeft(32) |
|
|
|
assert.equal( u.toNumber(), 0 ) |
|
done() |
|
}) |
|
|
|
}) |
|
|
|
describe('1<<31', function () { |
|
|
|
it('should return 2^31', function (done) { |
|
var u = UINT64(1).shiftLeft(31) |
|
|
|
assert.equal( u.toString(16), '80000000' ) |
|
done() |
|
}) |
|
|
|
}) |
|
|
|
describe('9<<28', function () { |
|
|
|
it('should return 2^31', function (done) { |
|
var u = UINT64(9).shiftLeft(28) |
|
|
|
assert.equal( u.toString(16), '90000000' ) |
|
done() |
|
}) |
|
|
|
}) |
|
|
|
})
|
|
|