blob: 5fde8be912367bfc6e03bec670402acadf60818c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
import { formatRelevantDigits } from '~/lib/utils/number_utils';
describe('Number Utils', () => {
describe('formatRelevantDigits', () => {
it('returns an empty string when the number is NaN', () => {
expect(formatRelevantDigits('fail')).toBe('');
});
it('returns 4 decimals when there is 4 plus digits to the left', () => {
const formattedNumber = formatRelevantDigits('1000.1234567');
const rightFromDecimal = formattedNumber.split('.')[1];
const leftFromDecimal = formattedNumber.split('.')[0];
expect(rightFromDecimal.length).toBe(4);
expect(leftFromDecimal.length).toBe(4);
});
it('returns 3 decimals when there is 1 digit to the left', () => {
const formattedNumber = formatRelevantDigits('0.1234567');
const rightFromDecimal = formattedNumber.split('.')[1];
const leftFromDecimal = formattedNumber.split('.')[0];
expect(rightFromDecimal.length).toBe(3);
expect(leftFromDecimal.length).toBe(1);
});
it('returns 2 decimals when there is 2 digits to the left', () => {
const formattedNumber = formatRelevantDigits('10.1234567');
const rightFromDecimal = formattedNumber.split('.')[1];
const leftFromDecimal = formattedNumber.split('.')[0];
expect(rightFromDecimal.length).toBe(2);
expect(leftFromDecimal.length).toBe(2);
});
it('returns 1 decimal when there is 3 digits to the left', () => {
const formattedNumber = formatRelevantDigits('100.1234567');
const rightFromDecimal = formattedNumber.split('.')[1];
const leftFromDecimal = formattedNumber.split('.')[0];
expect(rightFromDecimal.length).toBe(1);
expect(leftFromDecimal.length).toBe(3);
});
});
});
|