96 lines
1.6 KiB
JavaScript
96 lines
1.6 KiB
JavaScript
var assert = require('assert')
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var UINT32 = require('..').UINT32
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describe('shiftRight method', function () {
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describe('0>>1', function () {
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it('should return 0', function (done) {
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var u = UINT32(0).shiftRight(1)
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assert.equal( u.toNumber(), 0 )
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done()
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})
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})
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describe('4>>2', function () {
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it('should return 1', function (done) {
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var u = UINT32(4).shiftRight(2)
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assert.equal( u.toNumber(), 1 )
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done()
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})
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})
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describe('2^16>>16', function () {
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it('should return 1', function (done) {
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var n = Math.pow(2, 16)
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var u = UINT32(n).shiftRight(16)
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assert.equal( u.toNumber(), 1 )
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done()
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})
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})
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describe('1>>32', function () {
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it('should return 0', function (done) {
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var u = UINT32(1).shiftRight(32)
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assert.equal( u.toNumber(), 0 )
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done()
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})
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})
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describe('2^31>>31', function () {
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it('should return 1', function (done) {
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var u = UINT32('80000000', 16).shiftRight(31)
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assert.equal( u.toNumber(), 1 )
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done()
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})
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})
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describe('2^28>>28', function () {
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it('should return 1', function (done) {
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var u = UINT32('10000000', 16).shiftRight(28)
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assert.equal( u.toNumber(), 1 )
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done()
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})
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})
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describe('2^31+2^28>>31', function () {
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it('should return 1', function (done) {
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var u = UINT32('90000000', 16).shiftRight(31)
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assert.equal( u.toNumber(), 1 )
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done()
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})
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})
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describe('2^31+2^28>>28', function () {
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it('should return 9', function (done) {
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var u = UINT32('90000000', 16).shiftRight(28)
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assert.equal( u.toNumber(), 9 )
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done()
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})
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})
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})
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