@Test
public void numberItemWithoutDimensionShouldConvertToDecimalType() {

    Item item = new NumberItem("number");
    State originalState = new QuantityType<>("12.34 °C");
    State convertedState = itemStateConverter.convertToAcceptedState(originalState, item);
    assertThat(convertedState, is(new DecimalType("12.34")));
}