@Test
public void map() {
StreamT<Integer> streamT = StreamT.of(AnyM.ofMonad(Optional.of(Stream.of(10))));
assertThat(
streamT
.map(num -> "hello world" + num)
.unwrap()
.<Optional<Stream<String>>>unwrap()
.get()
.collect(Collectors.toList()),
equalTo(Arrays.asList("hello world10")));
}
@Test
public void filterSuccess() {
StreamT<Integer> streamT = StreamT.of(AnyM.ofMonad(Optional.of(Stream.of(10))));
assertThat(
streamT
.filter(num -> num == 10)
.unwrap()
.<Optional<Stream<String>>>unwrap()
.get()
.collect(Collectors.toList()),
equalTo(Arrays.asList(10)));
}
@Test
public void peek() {
result = null;
StreamT<Integer> streamT = StreamT.of(AnyM.ofMonad(Optional.of(Stream.of(10))));
streamT
.peek(num -> result = "hello world" + num)
.unwrap()
.<Optional<Stream<String>>>unwrap()
.get()
.collect(Collectors.toList());
assertThat(result, equalTo("hello world10"));
}
/**
* Execute and Yield a result from this for comprehension using the supplied function
*
* <p>e.g. sum every element across nested structures
*
* <pre>{@code Do.add(list1)
* .yield((Integer i1) -> i1);
*
* }</pre>
*
* @param f To be applied to every element in the for comprehension
* @return For comprehension result
*/
public <R> AnyM<R> yield(Function<? super T1, R> f) {
if (getOrgType() != null)
return new MonadWrapper(this.yieldInternal(f), this.getOrgType()).anyM();
else return AnyM.ofMonad(this.yieldInternal(f));
}
/** @return This monad, wrapped as AnyM of Disabled */
public AnyM<F> anyMDisabled() {
return AnyM.ofMonad(Optional.empty());
}
@Test
public void switchTest() {
assertThat(
AnyM.ofMonad(FeatureToggle.enable("hello world")).map(o -> "2" + o).asSequence().toList(),
equalTo(Arrays.asList("2hello world")));
}