CODEWITHSUNDEEP
javaunit-testingjunitassertion
Abel de Bruijn
Abel de Bruijn

Reputation: 180

How to do something like Assertions.assertAllFalse()?

I'm using import static org.junit.jupiter.api.Assertions.*; for unit testing and I have to assert for many items if they are false. For instance:

boolean item1 = false;
boolean item2 = false;
boolean item3 = false;
boolean item4 = false;

// is something like this possible
Assertions.assertAllFalse(item1, item2, item3, item4);

What method should I use and how?

Upvotes: 0

Views: 341

Answers (3)

knittl
knittl

Reputation: 265817

Depending on the number of your values, easiest (IMHO) would be to simply write it out as a logical expression:

Assertions.assertThat(item1 || item2 || item3 || item4).isFalse();
Assertions.assertThat(!(item1 && item2 && item3 && item4)).isTrue();

If one of your boolean values is true, the test will fail.

Or, if you do not know the number of values beforehand, iterable and array assertions might be of help:

final List<Boolean> bools = …; // e.g. List.of(item1, item2, item3, item4)
Assertions.assertThat(bools).containsOnly(false);
Assertions.assertThat(bools).doesNotContain(true);
Assertions.assertThat(bools).allMatch(b -> !b);
Assertions.assertThat(bools).noneMatch(b -> b);

Or you might even use plain Java streams to express your expectation:

final List<Boolean> bools = …; // e.g. List.of(item1, item2, item3, item4)
Assertions.assertThat(bools.stream().filter(b -> b).count()).isEqualTo(0);
Assertions.assertThat(bools.stream().allMatch(b -> !b)).isTrue();

Upvotes: 2

taygetos
taygetos

Reputation: 3040

You could implement your own method for that:

@Test
public void test(){
  assertAllFalse(true, true, false);
}

public void assertAllFalse(Boolean... conditions){
  List.of(conditions).forEach(Assert::assertFalse);
}

Upvotes: 2

Kaj Hejer
Kaj Hejer

Reputation: 1040

You could use assertFalse(item1 || item2 || item3 || item4).

Upvotes: 1

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