@Test
public void testMultiply_invalidInput_noNumbers() throws Exception {
// No numbers provided
final NumbersDto numbersDto = new NumbersDto(Arrays.asList());
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("No numbers provided");
controller.multiply(numbersDto);
}
@Test
public void testMultiply() throws Exception {
final NumbersDto numbersDto = new NumbersDto(Arrays.asList(BigDecimal.ONE, BigDecimal.TEN));
// expectations
when(calculatorService.multiply(numbersDto)).thenReturn(BigDecimal.TEN);
final BigDecimal result = controller.multiply(numbersDto);
// verifications
assertEquals(BigDecimal.TEN, result);
}
