superset/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-number-format/test/NumberFormatterRegistry.test.js

import NumberFormatterRegistry from '../src/NumberFormatterRegistry';
import NumberFormatter from '../src/NumberFormatter';

describe('NumberFormatterRegistry', () => {
  let registry;
  beforeEach(() => {
    registry = new NumberFormatterRegistry();
  });
  describe('.get(format)', () => {
    it('creates and returns a new formatter if does not exist', () => {
      const formatter = registry.get('.2f');
      expect(formatter).toBeInstanceOf(NumberFormatter);
      expect(formatter.format(100)).toEqual('100.00');
    });
    it('returns an existing formatter if already exists', () => {
      const formatter = registry.get('.2f');
      const formatter2 = registry.get('.2f');
      expect(formatter).toBe(formatter2);
    });
    it('falls back to default format if format is not specified', () => {
      registry.setDefaultKey('.1f');
      const formatter = registry.get();
      expect(formatter.format(100)).toEqual('100.0');
    });
  });
  describe('.format(format, value)', () => {
    it('return the value with the specified format', () => {
      expect(registry.format('.2f', 100)).toEqual('100.00');
      expect(registry.format(',d', 100)).toEqual('100');
    });
  });
});