Examples with Try javaslang.control.Try used on opensource projects

Example 6 with Try

use of javaslang.control.Try in project javaslang by javaslang.

the class CheckedFunction0Test method shouldLiftTryPartialFunction.

@Test
public void shouldLiftTryPartialFunction() {
    final AtomicInteger integer = new AtomicInteger();
    CheckedFunction0<MessageDigest> digest = () -> MessageDigest.getInstance(integer.get() == 0 ? "MD5" : "Unknown");
    Function0<Try<MessageDigest>> liftTry = CheckedFunction0.liftTry(digest);
    Try<MessageDigest> md5 = liftTry.apply();
    assertThat(md5.isSuccess()).isTrue();
    assertThat(md5.get()).isNotNull();
    assertThat(md5.get().getAlgorithm()).isEqualToIgnoringCase("MD5");
    assertThat(md5.get().getDigestLength()).isEqualTo(16);
    integer.incrementAndGet();
    Try<MessageDigest> unknown = liftTry.apply();
    assertThat(unknown.isFailure()).isTrue();
    assertThat(unknown.getCause()).isNotNull();
    assertThat(unknown.getCause().getMessage()).isEqualToIgnoringCase("Unknown MessageDigest not available");
}

Example 7 with Try

use of javaslang.control.Try in project javaslang by javaslang.

the class StreamTest method shouldNotEvaluateHeadOfTailWhenCallingIteratorHasNext.

// See #327, #594
@Test
public void shouldNotEvaluateHeadOfTailWhenCallingIteratorHasNext() {
    final Integer[] vals = new Integer[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    final CheckedFunction2<StringBuilder, Integer, Void> doStuff = (builder, i) -> {
        builder.append(i);
        if (i == 5) {
            throw new Exception("Some error !!!");
        } else {
            return null;
        }
    };
    final StringBuilder actual = new StringBuilder();
    final CheckedFunction1<Integer, Void> consumer1 = doStuff.apply(actual);
    Stream.of(vals).map(v -> Try.run(() -> consumer1.apply(v))).find(Try::isFailure).getOrElse(() -> Try.success(null));
    final StringBuilder expected = new StringBuilder();
    final CheckedFunction1<Integer, Void> consumer2 = doStuff.apply(expected);
    java.util.stream.Stream.of(vals).map(v -> Try.run(() -> consumer2.apply(v))).filter(Try::isFailure).findFirst().orElseGet(() -> Try.success(null));
    assertThat(actual.toString()).isEqualTo(expected.toString());
}

Example 8 with Try

use of javaslang.control.Try in project javaslang by javaslang.

the class Function0Test method shouldLiftTryPartialFunction.

@Test
public void shouldLiftTryPartialFunction() {
    AtomicInteger integer = new AtomicInteger();
    Function0<Integer> divByZero = () -> 10 / integer.get();
    Function0<Try<Integer>> divByZeroTry = Function0.liftTry(divByZero);
    Try<Integer> res = divByZeroTry.apply();
    assertThat(res.isFailure()).isTrue();
    assertThat(res.getCause()).isNotNull();
    assertThat(res.getCause().getMessage()).isEqualToIgnoringCase("/ by zero");
    integer.incrementAndGet();
    res = divByZeroTry.apply();
    assertThat(res.isSuccess()).isTrue();
    assertThat(res.get()).isEqualTo(10);
}

Example 9 with Try

use of javaslang.control.Try in project javaslang by javaslang.

the class Function2Test method shouldLiftTryPartialFunction.

@Test
public void shouldLiftTryPartialFunction() {
    AtomicInteger integer = new AtomicInteger();
    Function2<Integer, Integer, Integer> divByZero = (i1, i2) -> 10 / integer.get();
    Function2<Integer, Integer, Try<Integer>> divByZeroTry = Function2.liftTry(divByZero);
    Try<Integer> res = divByZeroTry.apply(0, 0);
    assertThat(res.isFailure()).isTrue();
    assertThat(res.getCause()).isNotNull();
    assertThat(res.getCause().getMessage()).isEqualToIgnoringCase("/ by zero");
    integer.incrementAndGet();
    res = divByZeroTry.apply(1, 2);
    assertThat(res.isSuccess()).isTrue();
    assertThat(res.get()).isEqualTo(10);
}

Example 10 with Try

use of javaslang.control.Try in project javaslang by javaslang.

the class Function5Test method shouldLiftTryPartialFunction.

@Test
public void shouldLiftTryPartialFunction() {
    AtomicInteger integer = new AtomicInteger();
    Function5<Integer, Integer, Integer, Integer, Integer, Integer> divByZero = (i1, i2, i3, i4, i5) -> 10 / integer.get();
    Function5<Integer, Integer, Integer, Integer, Integer, Try<Integer>> divByZeroTry = Function5.liftTry(divByZero);
    Try<Integer> res = divByZeroTry.apply(0, 0, 0, 0, 0);
    assertThat(res.isFailure()).isTrue();
    assertThat(res.getCause()).isNotNull();
    assertThat(res.getCause().getMessage()).isEqualToIgnoringCase("/ by zero");
    integer.incrementAndGet();
    res = divByZeroTry.apply(1, 2, 3, 4, 5);
    assertThat(res.isSuccess()).isTrue();
    assertThat(res.get()).isEqualTo(10);
}