3.x: Have unit tests extends RxJavaTest - 5 (#6604)

This commit updates the unit tests of the following operators:
* internal.operators.maybe
* internal.operator.mixed
* internal.operator.single

Related: #6583

Author: RomanWuattier

src/test/java/io/reactivex/internal/operators/maybe/AbstractMaybeWithUpstreamTest.java

@@ -13,14 +13,15 @@
 
 package io.reactivex.internal.operators.maybe;
 
+import io.reactivex.RxJavaTest;
 import org.junit.Test;
 import static org.junit.Assert.*;
 
 import io.reactivex.Maybe;
 import io.reactivex.internal.functions.Functions;
 import io.reactivex.internal.fuseable.HasUpstreamMaybeSource;
 
-public class AbstractMaybeWithUpstreamTest {
+public class AbstractMaybeWithUpstreamTest extends RxJavaTest {
 
     @SuppressWarnings("unchecked")
     @Test

src/test/java/io/reactivex/internal/operators/maybe/MaybeAmbTest.java

@@ -33,7 +33,7 @@
 import io.reactivex.subjects.*;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeAmbTest {
+public class MaybeAmbTest extends RxJavaTest {
 
     @Test
     public void ambLots() {

src/test/java/io/reactivex/internal/operators/maybe/MaybeCacheTest.java

@@ -27,7 +27,7 @@
 import io.reactivex.subscribers.TestSubscriber;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeCacheTest {
+public class MaybeCacheTest extends RxJavaTest {
 
     @Test
     public void offlineSuccess() {

src/test/java/io/reactivex/internal/operators/maybe/MaybeCallbackObserverTest.java

@@ -13,6 +13,7 @@
 
 package io.reactivex.internal.operators.maybe;
 
+import io.reactivex.RxJavaTest;
 import io.reactivex.disposables.*;
 import io.reactivex.exceptions.*;
 import io.reactivex.functions.*;
@@ -26,7 +27,7 @@
 
 import static org.junit.Assert.*;
 
-public class MaybeCallbackObserverTest {
+public class MaybeCallbackObserverTest extends RxJavaTest {
 
     @Test
     public void dispose() {

src/test/java/io/reactivex/internal/operators/maybe/MaybeConcatArrayTest.java

@@ -27,7 +27,7 @@
 import io.reactivex.subscribers.TestSubscriber;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeConcatArrayTest {
+public class MaybeConcatArrayTest extends RxJavaTest {
 
     @SuppressWarnings("unchecked")
     @Test

src/test/java/io/reactivex/internal/operators/maybe/MaybeConcatIterableTest.java

@@ -27,7 +27,7 @@
 import io.reactivex.subscribers.TestSubscriber;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeConcatIterableTest {
+public class MaybeConcatIterableTest extends RxJavaTest {
 
     @SuppressWarnings("unchecked")
     @Test

src/test/java/io/reactivex/internal/operators/maybe/MaybeConcatPublisherTest.java

@@ -18,7 +18,7 @@
 
 import io.reactivex.*;
 
-public class MaybeConcatPublisherTest {
+public class MaybeConcatPublisherTest extends RxJavaTest {
 
     @Test
     public void scalar() {

src/test/java/io/reactivex/internal/operators/maybe/MaybeContainsTest.java

@@ -25,7 +25,7 @@
 import io.reactivex.processors.PublishProcessor;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeContainsTest {
+public class MaybeContainsTest extends RxJavaTest {
 
     @Test
     public void doesContain() {

src/test/java/io/reactivex/internal/operators/maybe/MaybeCountTest.java

@@ -25,7 +25,7 @@
 import io.reactivex.processors.PublishProcessor;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeCountTest {
+public class MaybeCountTest extends RxJavaTest {
 
     @Test
     public void one() {

src/test/java/io/reactivex/internal/operators/maybe/MaybeCreateTest.java

@@ -26,7 +26,7 @@
 import io.reactivex.plugins.RxJavaPlugins;
 import io.reactivex.testsupport.TestHelper;
 
-public class MaybeCreateTest {
+public class MaybeCreateTest extends RxJavaTest {
 
     @Test
     public void callbackThrows() {