Chai assertions for comparing arbitrary-precision integers using the bignumber.js library
Chai assertions for comparing arbitrary-precision integers using the bn.js library. Forked from chai-bignumber, which uses the bignumber.js library.
npm install --save-dev chai-bn
const chai = require('chai');
const BN = require('bn.js');
// Enable and inject BN dependency
chai.use(require('chai-bn')(BN));
The following assertion methods are provided and will override the existing builtin assertions if the bignumber property is set as part of the assertion chain:
A set of additional assertion properties is also provided:
Both actual values (the values being asserted) and expected values (the values the actual value is expected to match) can be either instances of BN, or strings which can be converted into a valid number. This is a key difference with chai-bignumber, which automatically converts JavaScript numbers to BigNumber instances for both actual and expected values.
Only BDD style (expect or should) assertions are supported.
Methods:
const actual = new BN('100000000000000000').plus(new BN('1'));
const expected = '100000000000000001';
actual.should.be.a.bignumber.that.equals(expected);
expect(actual).to.be.a.bignumber.that.is.at.most(expected);
(new BN('1000')).should.be.a.bignumber.that.is.lessThan('2000');
Properties:
(new BN('-100')).should.be.a.bignumber.that.is.negative;
expect(new BN('1').sub(new BN('1'))).to.be.a.bignumber.that.is.zero;
Some Chai properties (e.g. the that.is chain) have no effect other than increasing readability, and can be dropped if less verbosity is desired.
0.3.1
FAQs
Chai assertions for comparing arbitrary-precision integers using the bignumber.js library
The npm package chai-bn receives a total of 6,834 weekly downloads. As such, chai-bn popularity was classified as popular.
We found that chai-bn demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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