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114 lines
2.1 KiB
114 lines
2.1 KiB
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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