status = datapoint._copy(outValue, in_double_value);
Assert.assertEquals(1, status);
Assert.assertEquals(11, outValue.unsignedValue());
// copy string to unsigned (value = "")
outValue.unsignedValue(0);
in_string_value.charValue("");
status = datapoint._copy(outValue, in_string_value);
Assert.assertEquals(0, status);
Assert.assertEquals(0, outValue.unsignedValue());
// copy string to unsigned (value = "test")
outValue.unsignedValue(0);