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