Add tests for our number formatting function (#29852)
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								app/javascript/mastodon/utils/__tests__/numbers.ts
									
									
									
									
									
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								app/javascript/mastodon/utils/__tests__/numbers.ts
									
									
									
									
									
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import { DECIMAL_UNITS, toShortNumber } from '../numbers';
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interface TableRow {
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  input: number;
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  base: number;
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  unit: number;
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  digits: number;
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}
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describe.each`
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  input             | base         | unit                      | digits
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  ${10_000_000}     | ${10}        | ${DECIMAL_UNITS.MILLION}  | ${0}
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  ${2_789_123}      | ${2.789123}  | ${DECIMAL_UNITS.MILLION}  | ${1}
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  ${12_345_789}     | ${12.345789} | ${DECIMAL_UNITS.MILLION}  | ${0}
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  ${10_000_000_000} | ${10}        | ${DECIMAL_UNITS.BILLION}  | ${0}
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  ${12}             | ${12}        | ${DECIMAL_UNITS.ONE}      | ${0}
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  ${123}            | ${123}       | ${DECIMAL_UNITS.ONE}      | ${0}
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  ${1234}           | ${1.234}     | ${DECIMAL_UNITS.THOUSAND} | ${1}
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  ${6666}           | ${6.666}     | ${DECIMAL_UNITS.THOUSAND} | ${1}
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`('toShortNumber', ({ input, base, unit, digits }: TableRow) => {
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  test(`correctly formats ${input}`, () => {
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    expect(toShortNumber(input)).toEqual([base, unit, digits]);
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  });
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});
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