@mcdevsl/superset-ui
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text/typescript
import { NumberFormatter } from '@superset-ui/core/src/number-format';
describe('NumberFormatter', () => {
describe('new NumberFormatter(config)', () => {
it('requires config.id', () => {
expect(
() =>
// @ts-ignore
new NumberFormatter({
formatFunc: () => '',
}),
).toThrow();
});
it('requires config.formatFunc', () => {
expect(
() =>
// @ts-ignore
new NumberFormatter({
id: 'my_format',
}),
).toThrow();
});
});
describe('formatter is also a format function itself', () => {
const formatter = new NumberFormatter({
id: 'fixed_3',
formatFunc: value => value.toFixed(3),
});
it('returns formatted value', () => {
expect(formatter(12345.67)).toEqual('12345.670');
});
it('formatter(value) is the same with formatter.format(value)', () => {
const value = 12345.67;
expect(formatter(value)).toEqual(formatter.format(value));
});
});
describe('.format(value)', () => {
const formatter = new NumberFormatter({
id: 'fixed_3',
formatFunc: value => value.toFixed(3),
});
it('handles null', () => {
expect(formatter.format(null)).toEqual('null');
});
it('handles undefined', () => {
expect(formatter.format(undefined)).toEqual('undefined');
});
it('handles NaN', () => {
expect(formatter.format(NaN)).toEqual('NaN');
});
it('handles positive and negative infinity', () => {
expect(formatter.format(Number.POSITIVE_INFINITY)).toEqual('∞');
expect(formatter.format(Number.NEGATIVE_INFINITY)).toEqual('-∞');
});
it('otherwise returns formatted value', () => {
expect(formatter.format(12345.67)).toEqual('12345.670');
});
});
describe('.preview(value)', () => {
const formatter = new NumberFormatter({
id: 'fixed_2',
formatFunc: value => value.toFixed(2),
});
it('returns string comparing value before and after formatting', () => {
expect(formatter.preview(100)).toEqual('100 => 100.00');
});
it('uses the default preview value if not specified', () => {
expect(formatter.preview()).toEqual('12345.432 => 12345.43');
});
});
});