MyCrypto/spec/utils/formatters.spec.js

71 lines
1.9 KiB
JavaScript

import Big from 'bignumber.js';
import {
toFixedIfLarger,
formatNumber,
formatGasLimit
} from '../../common/utils/formatters';
describe('toFixedIfLarger', () => {
it('should return same value if decimal isnt longer than default', () => {
const numExample = 7.002;
expect(toFixedIfLarger(numExample)).toEqual(String(numExample));
});
it('should return shortened value rounded up if decimal is longer than default', () => {
const numExample = 7.1234567;
expect(toFixedIfLarger(numExample)).toEqual(String(7.123457));
});
it('should return shortened value if decimal is longer than passed fixedSize', () => {
const numExample = 7.12345678;
expect(toFixedIfLarger(numExample, 2)).toEqual(String(7.12));
});
});
describe('formatNumber', () => {
const pairs = [
{
input: new Big('0.0127491'),
output: '0.013'
},
{
input: new Big('21.87468421'),
output: '21.875'
},
{
input: new Big(0),
output: '0'
},
{
input: new Big('354.4728173'),
output: '354.4728',
digits: 4
},
{
input: new Big('100.48391'),
output: '100',
digits: 0
}
];
pairs.forEach(pair => {
const digits = pair.digits === undefined ? 'default' : pair.digits;
it(`should convert ${pair.input.toString()} to ${pair.output} when using ${digits} digits`, () => {
expect(formatNumber(pair.input, pair.digits)).toEqual(pair.output);
});
});
});
describe('formatGasLimit', () => {
it('should fix transaction gas limit off-by-one errors', () => {
expect(formatGasLimit(new Big(21001), 'ether')).toEqual('21000');
});
it('should mark the gas limit `-1` if you exceed the limit per block', () => {
expect(formatGasLimit(new Big(999999999999999), 'ether')).toEqual('-1');
});
it('should not alter a valid gas limit', () => {
expect(formatGasLimit(new Big(1234))).toEqual('1234');
});
});