@Test
public void shouldFlatMapArbitrary() {
final Arbitrary<Integer> arbitraryInt = size -> Gen.choose(-size, size);
final Arbitrary<BinaryTree<Integer>> arbitraryTree =
arbitraryInt.flatMap(i -> new ArbitraryBinaryTree(-i, i));
assertThat(arbitraryTree.apply(0).apply(new Random())).isNotNull();
}
@Test(expected = RuntimeException.class)
public void shouldThrowOnForEach() {
Arbitrary.integer()
.forEach(
i -> {
throw new RuntimeException("OK");
});
}
@Test
public void shouldNotBeEmpty() {
assertThat(Arbitrary.integer().isEmpty()).isFalse();
}
@Test
public void shouldPeekArbitrary() {
final int[] actual = new int[] {Integer.MIN_VALUE};
final int expected = Arbitrary.integer().peek(i -> actual[0] = i).apply(10).apply(new Random());
assertThat(actual[0]).isEqualTo(expected);
}
@Test
public void shouldThrowOnForAll() {
Arbitrary.integer().forAll(i -> false);
}
@Test
public void shouldThrowOnExists() {
Arbitrary.integer().exists(i -> true);
}
@Test
public void shouldFlatteningArbitraryIntegerUsingFunction() {
final Arbitrary<Arbitrary<Integer>> testee = size -> random -> Arbitrary.integer();
assertThat(testee.flatten().apply(1).apply(new Random())).isNotNull();
}
@Test
public void shouldFilterArbitrary() {
final Arbitrary<Integer> ints = Arbitrary.integer();
final Arbitrary<Integer> evenInts = ints.filter(i -> i % 2 == 0);
assertThat(evenInts.apply(10).apply(new Random())).isNotNull();
}
@Test
public void shouldMapArbitrary() {
final Arbitrary<Integer> arbitraryInt = size -> Gen.choose(-size, size);
final Arbitrary<BinaryTree<Integer>> arbitraryTree = arbitraryInt.map(BinaryTree::leaf);
assertThat(arbitraryTree.apply(0).apply(new Random())).isNotNull();
}
@Test
public void shouldCreateArbitraryStream() {
final Arbitrary<Stream<Integer>> arbitrary = Arbitrary.stream(Arbitrary.integer());
final Stream<Integer> actual = arbitrary.apply(10).apply(new Random());
assertThat(actual).isNotNull();
}
@Test
public void shouldCreateArbitraryList() {
final Arbitrary<List<Integer>> arbitrary = Arbitrary.list(Arbitrary.integer());
final List<Integer> actual = arbitrary.apply(10).apply(new Random());
assertThat(actual).isNotNull();
}
@Test
public void shouldCreateArbitraryString() {
final Arbitrary<String> arbitrary = Arbitrary.string(Gen.choose('a', 'z'));
final String actual = arbitrary.apply(10).apply(new Random());
assertThat(actual).isNotNull();
}
