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@defi.org/chai-bignumber
Advanced tools
Chai assertions for comparing arbitrary-precision decimals using the bignumber.js library
Chai assertions for comparing arbitrary-precision decimals using the bignumber.js library.
npm install --save-dev chai-bignumber
var chai = require('chai');
//use default BigNumber
chai.use(require('chai-bignumber')());
//use custom BigNumber
chai.use(require('chai-bignumber')(BigNumber));
The following assertion methods are provided and will override the existing
builtin assertions if the bignumber
property is explicitly set as part of
the assertion chain:
The above methods have the following signature: (value, dp, rm)
.
Where dp
is an optional argument which specifies the number of decimal places
to round each side of the comparison to (values are not rounded by default),
while rm
is an optional argument which specifies the
rounding mode
as supported by bignumber.js
(defaults to BigNumber.ROUND_HALF_UP
).
A set of additional assertion properties is also provided:
Values can be instances of number
, BigNumber
or string
which can be
converted into a valid number. Only BDD style (expect
or should
) assertions
are supported.
Methods:
var result = new BigNumber('100000000000000000').plus(1);
var expected = '100000000000000001';
result.should.be.bignumber.equal(expected);
expect(result).to.be.bignumber.at.most(expected);
'1000'.should.be.bignumber.lessThan(2000);
Methods with rounding:
var BigNumber = require('bignumber.js');
(100.343).should.be.bignumber.equal(100.341, 2);
(100.349).should.be.bignumber.equal(100.341, 2, BigNumber.ROUND_DOWN);
Properties:
(100 / 0).should.not.be.finite;
expect(10).to.be.integer;
(-100).should.be.negative;
expect(1 - 1).to.be.zero;
FAQs
Chai assertions for comparing arbitrary-precision decimals using the bignumber.js library
We found that @defi.org/chai-bignumber demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 8 open source maintainers collaborating on the project.
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