How to use

NNMedianFunction

in

org.kie.dmn.feel.runtime.functions.twovaluelogic

public static Number median(List<Number> list) {
  return medianFunction.invoke(list).cata(e -> null, Function.identity());
}

  public FEELFnResult<BigDecimal> invoke(@ParameterName("n") Object[] list) {
    if ( list == null ) {
      return FEELFnResult.ofResult(null);
    }

    return invoke( Arrays.asList( list ) );
  }
}

@Test
public void invokeArrayWithIntegers() {
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{10, 20, 30}), BigDecimal.valueOf(20));
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{10, 20, 30, -10, -20, -30}), BigDecimal.ZERO);
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{0, 0, 1}), BigDecimal.ZERO);
}

@Test
public void invokeListWithIntegers() {
  FunctionTestUtil.assertResult(medianFunction.invoke(Arrays.asList(10, 20, 30)), BigDecimal.valueOf(20));
  FunctionTestUtil.assertResult(medianFunction.invoke(Arrays.asList(10, 20, 30, -10, -20, -30)), BigDecimal.ZERO);
  FunctionTestUtil.assertResult(medianFunction.invoke(Arrays.asList(0, 0, 1)), BigDecimal.ZERO);
}

@Test
public void invokeListWithDoubles() {
  FunctionTestUtil.assertResult(medianFunction.invoke(Arrays.asList(10.0d, 20.0d, 30.0d)), BigDecimal.valueOf(20));
  FunctionTestUtil.assertResult(medianFunction.invoke(Arrays.asList(10.2d, 20.2d, 30.2d)), BigDecimal.valueOf(20.2));
}

@Test
public void invokeArrayWithDoubles() {
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{10.0d, 20.0d, 30.0d}), BigDecimal.valueOf(20));
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{10.2d, 20.2d, 30.2d}), BigDecimal.valueOf(20.2));
}

@Test
public void invokeListTypeHeterogenous() {
  FunctionTestUtil.assertResultError(medianFunction.invoke(Arrays.asList(1, "test")), InvalidParametersEvent.class);
}

@Test
public void invokeListParamSupportedTypesWithNull() {
  FunctionTestUtil.assertResult(medianFunction.invoke(Arrays.asList(20, 30, null, (long) 40, null, BigDecimal.TEN)), BigDecimal.valueOf(25));
}

@Test
public void invokeListEmpty() {
  FunctionTestUtil.assertResult(medianFunction.invoke(Collections.emptyList()), null);
}

@Test
public void invokeArrayParamSupportedTypesWithNull() {
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{20, 30, null, (long) 40, null, BigDecimal.TEN}), BigDecimal.valueOf(25));
}

@Test
public void invokeListNull() {
  FunctionTestUtil.assertResult(medianFunction.invoke((List) null), null);
}

@Test
public void invokeArrayNull() {
  FunctionTestUtil.assertResult(medianFunction.invoke((Object[]) null), null);
}

@Test
public void invokeArrayEmpty() {
  FunctionTestUtil.assertResult(medianFunction.invoke(new Object[]{}), null);
}

@Test
public void invokeArrayTypeHeterogenous() {
  FunctionTestUtil.assertResultError(medianFunction.invoke(new Object[]{1, "test"}), InvalidParametersEvent.class);
}