2.x: Add missing @test annotation on tests (ReactiveX#4597)

* 2.x: Add missing @test annotation on tests

* Fix test

Author: vanniktech

src/test/java/io/reactivex/internal/operators/flowable/FlowableDelayTest.java

@@ -787,6 +787,8 @@ public void testErrorRunsBeforeOnNext() {
         ts.assertError(TestException.class);
         ts.assertNotComplete();
     }
+
+    @Test
     public void testDelaySupplierSimple() {
         final PublishProcessor<Integer> ps = PublishProcessor.create();
 

src/test/java/io/reactivex/internal/operators/flowable/FlowableTakeUntilTest.java

@@ -252,6 +252,8 @@ public void testDownstreamUnsubscribes() {
         assertFalse("Until still has observers", until.hasSubscribers());
         assertFalse("TestSubscriber is unsubscribed", ts.isCancelled());
     }
+
+    @Test
     public void testBackpressure() {
         PublishProcessor<Integer> until = PublishProcessor.create();
 
@@ -267,6 +269,11 @@ public void testBackpressure() {
         ts.assertNoErrors();
         ts.assertNotComplete();
 
+        until.onNext(5);
+
+        ts.assertComplete();
+        ts.assertNoErrors();
+
         assertFalse("Until still has observers", until.hasSubscribers());
         assertFalse("TestSubscriber is unsubscribed", ts.isCancelled());
     }

src/test/java/io/reactivex/internal/operators/observable/ObservableDelayTest.java

@@ -789,6 +789,7 @@ public void testErrorRunsBeforeOnNext() {
         ts.assertNotComplete();
     }
 
+    @Test
     public void testDelaySupplierSimple() {
         final PublishSubject<Integer> ps = PublishSubject.create();