@Test
public void priceShouldBeSentToTheConfiguredDevice() {
Device device = mock(Device.class);
PosDisplay posDisplay = new PosDisplay(device);
posDisplay.printPrice(new Amount(100));
verify(device).write("100");
}
@Test
public void errorMessageShouldBeSentToTheConfiguredDevice() {
Device device = mock(Device.class);
PosDisplay posDisplay = new PosDisplay(device);
posDisplay.printPriceNotFoundMessage("Invalid product barcode [xyz]");
verify(device).write("Invalid product barcode [xyz]");
}
