/**
  * @covers ::id
  * @covers ::setCurrencyCode
  */
 function testId()
 {
     $currency_code = $this->randomMachineName(3);
     $this->assertSame($this->sut, $this->sut->setCurrencyCode($currency_code));
     $this->assertSame($currency_code, $this->sut->id());
 }