### Question:
PositiveIntegerValidator implements ServiceAttributeValidator { @Override public boolean validate(Set<String> values) { if (values.isEmpty()) { return false; } for (String value : values) { int intValue; try { intValue = Integer.parseInt(value); } catch (NumberFormatException nfe) { return false; } if (intValue <= 0) { return false; } } return true; }  @Override boolean validate(Set<String> values);  }### Answer:
@Test(dataProvider = "data") public void checkCorrectness(String name, boolean expected) { boolean result = validator.validate(Collections.singleton(name)); assertThat(result).isEqualTo(expected); }