115 lines
2.1 KiB
JavaScript
115 lines
2.1 KiB
JavaScript
var assert = require('assert')
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var UINT32 = require('..').UINT32
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describe('div method', function () {
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describe('1/0', function () {
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it('should throw', function (done) {
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assert.throws(
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function () {
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UINT32(1).div( UINT32(0) )
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}
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, function (err) {
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if (err instanceof Error) return true
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}
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)
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done()
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})
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})
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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(2).div( UINT32(1) )
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assert.equal( u.toNumber(), 2 )
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done()
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})
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})
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describe('2/1', function () {
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it('should return 2', function (done) {
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var u = UINT32(0).div( UINT32(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('1/2', function () {
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it('should return 0', function (done) {
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var u = UINT32(1).div( UINT32(2) )
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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('low bit/high bit', function () {
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it('should return n', function (done) {
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var n = Math.pow(2, 17)
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var u = UINT32(3).div( UINT32(n) )
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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('high bit/low bit', function () {
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it('should return n', function (done) {
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var n = Math.pow(2, 17)
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var u = UINT32(n).div( UINT32(3) )
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assert.equal( u.toNumber(), (n/3)|0 )
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assert.equal( u.remainder.toNumber(), 2 )
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done()
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})
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})
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describe('high bit/high bit', function () {
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it('should return n', function (done) {
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var n = 'FFFFFFFF'
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var u = UINT32(n, 16).div( UINT32(n, 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('high bit/high bit 2', function () {
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it('should return n', function (done) {
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var u = UINT32('3266489917').div( UINT32('668265263') )
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assert.equal( u.toNumber(), 4 )
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done()
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})
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})
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describe('374761393/(16^3)', function () {
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it('should return 91494', function (done) {
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var u = UINT32('374761393').div( UINT32(16*16*16) )
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assert.equal( u.toNumber(), 91494 )
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done()
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})
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})
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})
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