BAEL-5557 Split a stream into parts (#12238)

* BAEL-5557 Split a stream into parts

* BAEL-5557 fix main pom.xml

* BAEL-5557 fix mvn profiles

* BAEL-5557 articles with equals and hashcode

* BAEL-5557 migrate assertions to assertj

* BAEL-5557 better assertions

core-java-modules/core-java-streams-4/pom.xml

@@ -15,6 +15,16 @@
     </parent>
 
     <dependencies>
+        <dependency>
+            <groupId>io.reactivex</groupId>
+            <artifactId>rxjava</artifactId>
+            <version>${rx.java.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.reactivex.rxjava2</groupId>
+            <artifactId>rxjava</artifactId>
+            <version>${rx.java2.version}</version>
+        </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -27,6 +37,13 @@
             <type>pom</type>
             <scope>import</scope>
         </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>3.23.1</version>
+            <scope>test</scope>
+        </dependency>
+
     </dependencies>
 
     <build>
@@ -54,8 +71,10 @@
     <properties>
         <!-- testing -->
         <maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>12</maven.compiler.source>
+        <maven.compiler.target>12</maven.compiler.target>
+        <rx.java.version>1.2.5</rx.java.version>
+        <rx.java2.version>2.2.2</rx.java2.version>
     </properties>
 
 </project>