      -400, UnitPrefixScale.METRIC.NONE, UnitPrefixScale.METRIC.MICRO),
    -400000000);
  });

  test('defineUnitScale', function() {
    assert.strictEqual(UnitPrefixScale.PONY, undefined);
    const ponyScale = {
      SHORT_JUMPS: { value: 1e-3, symbol: 'SJ', baseSymbol: 'J'},
      REGULAR_JUMPS: { value: 1, symbol: 'J', baseSymbol: 'J'},
      LONG_JUMPS: {value: 1e3, symbol: 'LJ', baseSymbol: 'J'},
      EPIC_JUMPS: {value: 1e6, symbol: 'EJ', baseSymbol: 'J'}
    };
    UnitScale.defineUnitScale('PON