2.x: make any() and all() return Single, patch up tests

src/main/java/io/reactivex/Completable.java

@@ -29,9 +29,9 @@
 import io.reactivex.internal.operators.observable.ObservableDelaySubscriptionOther;
 import io.reactivex.internal.operators.single.SingleDelayWithCompletable;
 import io.reactivex.internal.util.ExceptionHelper;
+import io.reactivex.observers.TestObserver;
 import io.reactivex.plugins.RxJavaPlugins;
 import io.reactivex.schedulers.Schedulers;
-import io.reactivex.subscribers.TestSubscriber;
 
 /**
  * Represents a deferred computation without any value but only indication for completion or exception.
@@ -1804,41 +1804,41 @@ public final Completable unsubscribeOn(final Scheduler scheduler) {
     // -------------------------------------------------------------------------
 
     /**
-     * Creates a TestSubscriber and subscribes
+     * Creates a TestObserver and subscribes
      * it to this Completable.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code test} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
-     * @return the new TestSubscriber instance
+     * @return the new TestObserver instance
      * @since 2.0
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final TestSubscriber<Void> test() {
-        TestSubscriber<Void> ts = new TestSubscriber<Void>();
-        subscribe(new SubscriberCompletableObserver<Void>(ts));
+    public final TestObserver<Void> test() {
+        TestObserver<Void> ts = new TestObserver<Void>();
+        subscribe(ts);
         return ts;
     }
 
     /**
-     * Creates a TestSubscriber optionally in cancelled state, then subscribes it to this Completable.
-     * @param cancelled if true, the TestSubscriber will be cancelled before subscribing to this
+     * Creates a TestObserver optionally in cancelled state, then subscribes it to this Completable.
+     * @param cancelled if true, the TestObserver will be cancelled before subscribing to this
      * Completable.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code test} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
-     * @return the new TestSubscriber instance
+     * @return the new TestObserver instance
      * @since 2.0
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final TestSubscriber<Void> test(boolean cancelled) {
-        TestSubscriber<Void> ts = new TestSubscriber<Void>();
+    public final TestObserver<Void> test(boolean cancelled) {
+        TestObserver<Void> ts = new TestObserver<Void>();
 
         if (cancelled) {
             ts.cancel();
         }
-        subscribe(new SubscriberCompletableObserver<Void>(ts));
+        subscribe(ts);
         return ts;
     }
 }

src/main/java/io/reactivex/Flowable.java

@@ -4862,15 +4862,15 @@ public static <T, R> Flowable<R> zipIterable(Iterable<? extends Publisher<? exte
      *
      * @param predicate
      *            a function that evaluates an item and returns a Boolean
-     * @return a Flowable that emits {@code true} if all items emitted by the source Publisher satisfy the
+     * @return a Single that emits {@code true} if all items emitted by the source Publisher satisfy the
      *         predicate; otherwise, {@code false}
      * @see <a href="http://reactivex.io/documentation/operators/all.html">ReactiveX operators documentation: All</a>
      */
     @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Flowable<Boolean> all(Predicate<? super T> predicate) {
+    public final Single<Boolean> all(Predicate<? super T> predicate) {
         ObjectHelper.requireNonNull(predicate, "predicate is null");
-        return RxJavaPlugins.onAssembly(new FlowableAll<T>(this, predicate));
+        return RxJavaPlugins.onAssembly(new FlowableAllSingle<T>(this, predicate));
     }
 
     /**
@@ -4919,15 +4919,15 @@ public final Flowable<T> ambWith(Publisher<? extends T> other) {
      *
      * @param predicate
      *            the condition to test items emitted by the source Publisher
-     * @return a Flowable that emits a Boolean that indicates whether any item emitted by the source
+     * @return a Single that emits a Boolean that indicates whether any item emitted by the source
      *         Publisher satisfies the {@code predicate}
      * @see <a href="http://reactivex.io/documentation/operators/contains.html">ReactiveX operators documentation: Contains</a>
      */
     @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Flowable<Boolean> any(Predicate<? super T> predicate) {
+    public final Single<Boolean> any(Predicate<? super T> predicate) {
         ObjectHelper.requireNonNull(predicate, "predicate is null");
-        return RxJavaPlugins.onAssembly(new FlowableAny<T>(this, predicate));
+        return RxJavaPlugins.onAssembly(new FlowableAnySingle<T>(this, predicate));
     }
 
     /**
@@ -6660,7 +6660,7 @@ public final Flowable<T> concatWith(Publisher<? extends T> other) {
      */
     @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Flowable<Boolean> contains(final Object item) {
+    public final Single<Boolean> contains(final Object item) {
         ObjectHelper.requireNonNull(item, "item is null");
         return any(Functions.equalsWith(item));
     }
@@ -8814,7 +8814,7 @@ public final Flowable<T> ignoreElements() {
      */
     @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Flowable<Boolean> isEmpty() {
+    public final Single<Boolean> isEmpty() {
         return all(Functions.alwaysFalse());
     }
 

src/main/java/io/reactivex/Maybe.java

@@ -26,9 +26,9 @@
 import io.reactivex.internal.operators.flowable.*;
 import io.reactivex.internal.operators.maybe.*;
 import io.reactivex.internal.util.*;
+import io.reactivex.observers.TestObserver;
 import io.reactivex.plugins.RxJavaPlugins;
 import io.reactivex.schedulers.Schedulers;
-import io.reactivex.subscribers.TestSubscriber;
 
 /**
  * Represents a deferred computation and emission of a maybe value or exception.
@@ -3776,40 +3776,40 @@ public final <U, R> Maybe<R> zipWith(MaybeSource<? extends U> other, BiFunction<
     // ------------------------------------------------------------------
 
     /**
-     * Creates a TestSubscriber and subscribes
+     * Creates a TestObserver and subscribes
      * it to this Maybe.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code test} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
-     * @return the new TestSubscriber instance
+     * @return the new TestObserver instance
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final TestSubscriber<T> test() {
-        TestSubscriber<T> ts = new TestSubscriber<T>();
-        toFlowable().subscribe(ts);
+    public final TestObserver<T> test() {
+        TestObserver<T> ts = new TestObserver<T>();
+        subscribe(ts);
         return ts;
     }
 
     /**
-     * Creates a TestSubscriber optionally in cancelled state, then subscribes it to this Maybe.
+     * Creates a TestObserver optionally in cancelled state, then subscribes it to this Maybe.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code test} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
-     * @param cancelled if true, the TestSubscriber will be cancelled before subscribing to this
+     * @param cancelled if true, the TestObserver will be cancelled before subscribing to this
      * Maybe.
-     * @return the new TestSubscriber instance
+     * @return the new TestObserver instance
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final TestSubscriber<T> test(boolean cancelled) {
-        TestSubscriber<T> ts = new TestSubscriber<T>();
+    public final TestObserver<T> test(boolean cancelled) {
+        TestObserver<T> ts = new TestObserver<T>();
 
         if (cancelled) {
             ts.cancel();
         }
 
-        toFlowable().subscribe(ts);
+        subscribe(ts);
         return ts;
     }
 }

src/main/java/io/reactivex/Observable.java

@@ -4260,14 +4260,14 @@ public static <T, R> Observable<R> zipIterable(Iterable<? extends ObservableSour
      *
      * @param predicate
      *            a function that evaluates an item and returns a Boolean
-     * @return an Observable that emits {@code true} if all items emitted by the source ObservableSource satisfy the
+     * @return a Single that emits {@code true} if all items emitted by the source ObservableSource satisfy the
      *         predicate; otherwise, {@code false}
      * @see <a href="http://reactivex.io/documentation/operators/all.html">ReactiveX operators documentation: All</a>
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Observable<Boolean> all(Predicate<? super T> predicate) {
+    public final Single<Boolean> all(Predicate<? super T> predicate) {
         ObjectHelper.requireNonNull(predicate, "predicate is null");
-        return RxJavaPlugins.onAssembly(new ObservableAll<T>(this, predicate));
+        return RxJavaPlugins.onAssembly(new ObservableAllSingle<T>(this, predicate));
     }
 
     /**
@@ -4309,14 +4309,14 @@ public final Observable<T> ambWith(ObservableSource<? extends T> other) {
      *
      * @param predicate
      *            the condition to test items emitted by the source ObservableSource
-     * @return an Observable that emits a Boolean that indicates whether any item emitted by the source
+     * @return a Single that emits a Boolean that indicates whether any item emitted by the source
      *         ObservableSource satisfies the {@code predicate}
      * @see <a href="http://reactivex.io/documentation/operators/contains.html">ReactiveX operators documentation: Contains</a>
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Observable<Boolean> any(Predicate<? super T> predicate) {
+    public final Single<Boolean> any(Predicate<? super T> predicate) {
         ObjectHelper.requireNonNull(predicate, "predicate is null");
-        return RxJavaPlugins.onAssembly(new ObservableAny<T>(this, predicate));
+        return RxJavaPlugins.onAssembly(new ObservableAnySingle<T>(this, predicate));
     }
 
     /**
@@ -5798,12 +5798,12 @@ public final Observable<T> concatWith(ObservableSource<? extends T> other) {
      *
      * @param element
      *            the item to search for in the emissions from the source ObservableSource
-     * @return an Observable that emits {@code true} if the specified item is emitted by the source ObservableSource,
+     * @return a Single that emits {@code true} if the specified item is emitted by the source ObservableSource,
      *         or {@code false} if the source ObservableSource completes without emitting that item
      * @see <a href="http://reactivex.io/documentation/operators/contains.html">ReactiveX operators documentation: Contains</a>
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Observable<Boolean> contains(final Object element) {
+    public final Single<Boolean> contains(final Object element) {
         ObjectHelper.requireNonNull(element, "element is null");
         return any(Functions.equalsWith(element));
     }
@@ -7594,11 +7594,11 @@ public final Observable<T> ignoreElements() {
      *  <dd>{@code isEmpty} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
      *
-     * @return an Observable that emits a Boolean
+     * @return a Single that emits a Boolean
      * @see <a href="http://reactivex.io/documentation/operators/contains.html">ReactiveX operators documentation: Contains</a>
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final Observable<Boolean> isEmpty() {
+    public final Single<Boolean> isEmpty() {
         return all(Functions.alwaysFalse());
     }
 

src/main/java/io/reactivex/Single.java

@@ -15,7 +15,7 @@
 
 import java.util.concurrent.*;
 
-import org.reactivestreams.*;
+import org.reactivestreams.Publisher;
 
 import io.reactivex.annotations.*;
 import io.reactivex.disposables.Disposable;
@@ -30,9 +30,9 @@
 import io.reactivex.internal.operators.observable.ObservableConcatMap;
 import io.reactivex.internal.operators.single.*;
 import io.reactivex.internal.util.*;
+import io.reactivex.observers.TestObserver;
 import io.reactivex.plugins.RxJavaPlugins;
 import io.reactivex.schedulers.Schedulers;
-import io.reactivex.subscribers.TestSubscriber;
 
 /**
  * The Single class implements the Reactive Pattern for a single value response.
@@ -2806,42 +2806,42 @@ public final <U, R> Single<R> zipWith(SingleSource<U> other, BiFunction<? super
     // Fluent test support, super handy and reduces test preparation boilerplate
     // -------------------------------------------------------------------------
     /**
-     * Creates a TestSubscriber and subscribes
+     * Creates a TestObserver and subscribes
      * it to this Single.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code test} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
-     * @return the new TestSubscriber instance
+     * @return the new TestObserver instance
      * @since 2.0
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final TestSubscriber<T> test() {
-        TestSubscriber<T> ts = new TestSubscriber<T>();
-        toFlowable().subscribe(ts);
+    public final TestObserver<T> test() {
+        TestObserver<T> ts = new TestObserver<T>();
+        subscribe(ts);
         return ts;
     }
 
     /**
-     * Creates a TestSubscriber optionally in cancelled state, then subscribes it to this Single.
+     * Creates a TestObserver optionally in cancelled state, then subscribes it to this Single.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code test} does not operate by default on a particular {@link Scheduler}.</dd>
      * </dl>
-     * @param cancelled if true, the TestSubscriber will be cancelled before subscribing to this
+     * @param cancelled if true, the TestObserver will be cancelled before subscribing to this
      * Single.
-     * @return the new TestSubscriber instance
+     * @return the new TestObserver instance
      * @since 2.0
      */
     @SchedulerSupport(SchedulerSupport.NONE)
-    public final TestSubscriber<T> test(boolean cancelled) {
-        TestSubscriber<T> ts = new TestSubscriber<T>();
+    public final TestObserver<T> test(boolean cancelled) {
+        TestObserver<T> ts = new TestObserver<T>();
 
         if (cancelled) {
             ts.cancel();
         }
 
-        toFlowable().subscribe(ts);
+        subscribe(ts);
         return ts;
     }
 }