Examples with Tuple2 javaslang.Tuple2 used on opensource projects

Example 1 with Tuple2

use of javaslang.Tuple2 in project javaslang by javaslang.

the class VectorPropertyTest method shouldBehaveLikeArray.

@Test
public void shouldBehaveLikeArray() {
    final int seed = ThreadLocalRandom.current().nextInt();
    System.out.println("using seed " + seed);
    final Random random = new Random(seed);
    for (int i = 1; i < 10; i++) {
        Seq<Object> expected = Array.empty();
        Vector<Object> actual = Vector.empty();
        for (int j = 0; j < 20_000; j++) {
            Seq<Tuple2<Seq<Object>, Vector<Object>>> history = Array.empty();
            if (percent(random) < 20) {
                expected = Array.ofAll(Vector.ofAll(randomValues(random, 100)).filter(v -> v instanceof Integer));
                actual = (percent(random) < 30) ? Vector.narrow(Vector.ofAll(ArrayType.<int[]>asPrimitives(int.class, expected))) : Vector.ofAll(expected);
                assertAreEqual(expected, actual);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 50) {
                final Object value = randomValue(random);
                expected = expected.append(value);
                actual = assertAreEqual(actual, value, Vector::append, expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 10) {
                Iterable<Object> values = randomValues(random, random.nextInt(2 * BRANCHING_FACTOR));
                expected = expected.appendAll(values);
                values = (percent(random) < 50) ? Iterator.ofAll(values.iterator()) : values;
                /* not traversable again */
                actual = assertAreEqual(actual, values, Vector::appendAll, expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 50) {
                final Object value = randomValue(random);
                expected = expected.prepend(value);
                actual = assertAreEqual(actual, value, Vector::prepend, expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 10) {
                Iterable<Object> values = randomValues(random, random.nextInt(2 * BRANCHING_FACTOR));
                expected = expected.prependAll(values);
                values = (percent(random) < 50) ? Iterator.ofAll(values) : values;
                /* not traversable again */
                actual = assertAreEqual(actual, values, Vector::prependAll, expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 30) {
                final int n = random.nextInt(expected.size() + 1);
                expected = expected.drop(n);
                actual = assertAreEqual(actual, n, Vector::drop, expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 10) {
                final int index = random.nextInt(expected.size() + 1);
                Iterable<Object> values = randomValues(random, random.nextInt(2 * BRANCHING_FACTOR));
                expected = expected.insertAll(index, values);
                values = (percent(random) < 50) ? Iterator.ofAll(values) : values;
                /* not traversable again */
                actual = assertAreEqual(actual, values, (a, p) -> a.insertAll(index, p), expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 30) {
                final int n = random.nextInt(expected.size() + 1);
                expected = expected.take(n);
                actual = assertAreEqual(actual, n, Vector::take, expected);
                history = history.append(Tuple(expected, actual));
            }
            if (!expected.isEmpty()) {
                assertThat(actual.head()).isEqualTo(expected.head());
                assertThat(actual.tail().toJavaList()).isEqualTo(expected.tail().toJavaList());
                history = history.append(Tuple(expected, actual));
            }
            if (!expected.isEmpty()) {
                final int index = random.nextInt(expected.size());
                assertThat(actual.get(index)).isEqualTo(expected.get(index));
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 50) {
                if (!expected.isEmpty()) {
                    final int index = random.nextInt(expected.size());
                    final Object value = randomValue(random);
                    expected = expected.update(index, value);
                    actual = assertAreEqual(actual, null, (a, p) -> a.update(index, value), expected);
                    history = history.append(Tuple(expected, actual));
                }
            }
            if (percent(random) < 20) {
                final Function<Object, Object> mapper = val -> (val instanceof Integer) ? ((Integer) val + 1) : val;
                expected = expected.map(mapper);
                actual = assertAreEqual(actual, null, (a, p) -> a.map(mapper), expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 30) {
                final Predicate<Object> filter = val -> (String.valueOf(val).length() % 10) == 0;
                expected = expected.filter(filter);
                actual = assertAreEqual(actual, null, (a, p) -> a.filter(filter), expected);
                history = history.append(Tuple(expected, actual));
            }
            if (percent(random) < 30) {
                for (int k = 0; k < 2; k++) {
                    if (!expected.isEmpty()) {
                        final int to = random.nextInt(expected.size());
                        final int from = random.nextInt(to + 1);
                        expected = expected.slice(from, to);
                        actual = assertAreEqual(actual, null, (a, p) -> a.slice(from, to), expected);
                        history = history.append(Tuple(expected, actual));
                    }
                }
            }
            // test that the modifications are persistent
            history.forEach(t -> assertAreEqual(t._1, t._2));
        }
    }
}