Upgrade tests to RxJava 3

Author: rschmitt

httpclient5-testing/pom.xml

@@ -99,7 +99,7 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>io.reactivex.rxjava2</groupId>
+      <groupId>io.reactivex.rxjava3</groupId>
       <artifactId>rxjava</artifactId>
       <scope>test</scope>
     </dependency>

httpclient5/pom.xml

@@ -63,7 +63,7 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>io.reactivex.rxjava2</groupId>
+      <groupId>io.reactivex.rxjava3</groupId>
       <artifactId>rxjava</artifactId>
       <scope>test</scope>
     </dependency>

httpclient5/src/test/java/org/apache/hc/client5/http/examples/ReactiveClientFullDuplexExchange.java

@@ -47,8 +47,8 @@
 import org.apache.hc.core5.reactor.IOReactorConfig;
 import org.reactivestreams.Publisher;
 
-import io.reactivex.Flowable;
-import io.reactivex.Observable;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Observable;
 
 /**
  * This example demonstrates a reactive, full-duplex HTTP/1.1 message exchange using RxJava.

httpclient5/src/test/java/org/apache/hc/client5/http/examples/UnixDomainSocketAsync.java

@@ -26,7 +26,7 @@
  */
 package org.apache.hc.client5.http.examples;
 
-import io.reactivex.Observable;
+import io.reactivex.rxjava3.core.Observable;
 import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
 import org.apache.hc.client5.http.async.methods.SimpleRequestProducer;
 import org.apache.hc.client5.http.config.RequestConfig;

pom.xml

@@ -73,7 +73,7 @@
     <hamcrest.version>3.0</hamcrest.version>
     <mockito.version>4.11.0</mockito.version>
     <hc.stylecheck.version>1</hc.stylecheck.version>
-    <rxjava.version>2.2.21</rxjava.version>
+    <rxjava3.version>3.1.10</rxjava3.version>
     <testcontainers.version>1.21.3</testcontainers.version>
     <junixsocket.version>2.10.1</junixsocket.version>
     <api.comparison.version>5.3</api.comparison.version>
@@ -161,9 +161,9 @@
         <version>${memcached.version}</version>
       </dependency>
       <dependency>
-        <groupId>io.reactivex.rxjava2</groupId>
+        <groupId>io.reactivex.rxjava3</groupId>
         <artifactId>rxjava</artifactId>
-        <version>${rxjava.version}</version>
+        <version>${rxjava3.version}</version>
         <scope>test</scope>
       </dependency>
       <dependency>