Merge branch 'master' of https://github.com/eugenp/tutorials into task/BAEL-9040

core-java-collections/README.md

@@ -4,37 +4,23 @@
 
 ### Relevant Articles: 
 - [Immutable ArrayList in Java](http://www.baeldung.com/java-immutable-list)
-- [Converting between an Array and a List in Java](http://www.baeldung.com/convert-array-to-list-and-list-to-array)
-- [Converting between an Array and a Set in Java](http://www.baeldung.com/convert-array-to-set-and-set-to-array)
-- [Converting between a List and a Set in Java](http://www.baeldung.com/convert-list-to-set-and-set-to-list)
-- [Convert a Map to an Array, List or Set in Java](http://www.baeldung.com/convert-map-values-to-array-list-set)
 - [Guide to the Java ArrayList](http://www.baeldung.com/java-arraylist)
 - [Random List Element](http://www.baeldung.com/java-random-list-element)
 - [Java - Combine Multiple Collections](http://www.baeldung.com/java-combine-multiple-collections)
-- [Guide to WeakHashMap in Java](http://www.baeldung.com/java-weakhashmap)
-- [Guide to the Guava BiMap](http://www.baeldung.com/guava-bimap)
-- [The Java HashMap Under the Hood](http://www.baeldung.com/java-hashmap)
-- [A Guide to LinkedHashMap in Java](http://www.baeldung.com/java-linked-hashmap)
-- [A Guide to TreeMap in Java](http://www.baeldung.com/java-treemap)
 - [Removing all nulls from a List in Java](http://www.baeldung.com/java-remove-nulls-from-list)
 - [Removing all duplicates from a List in Java](http://www.baeldung.com/java-remove-duplicates-from-list)
 - [Flattening Nested Collections in Java](http://www.baeldung.com/java-flatten-nested-collections)
 - [HashSet and TreeSet Comparison](http://www.baeldung.com/java-hashset-vs-treeset)
-- [Iterate over a Map in Java](http://www.baeldung.com/java-iterate-map)
 - [Collect a Java Stream to an Immutable Collection](http://www.baeldung.com/java-stream-immutable-collection)
-- [Converting a List to String in Java](http://www.baeldung.com/java-list-to-string)
 - [Introduction to the Java ArrayDeque](http://www.baeldung.com/java-array-deque)
 - [A Guide to HashSet in Java](http://www.baeldung.com/java-hashset)
 - [A Guide to TreeSet in Java](http://www.baeldung.com/java-tree-set)
-- [Java TreeMap vs HashMap](http://www.baeldung.com/java-treemap-vs-hashmap)
 - [How to TDD a List Implementation in Java](http://www.baeldung.com/java-test-driven-list)
-- [How to Store Duplicate Keys in a Map in Java?](http://www.baeldung.com/java-map-duplicate-keys)
 - [Getting the Size of an Iterable in Java](http://www.baeldung.com/java-iterable-size)
 - [Iterating Backward Through a List](http://www.baeldung.com/java-list-iterate-backwards)
 - [How to Filter a Collection in Java](http://www.baeldung.com/java-collection-filtering)
 - [Add Multiple Items to an Java ArrayList](http://www.baeldung.com/java-add-items-array-list)
 - [Remove the First Element from a List](http://www.baeldung.com/java-remove-first-element-from-list)
-- [How to Convert List to Map in Java](http://www.baeldung.com/java-list-to-map)
 - [Initializing HashSet at the Time of Construction](http://www.baeldung.com/java-initialize-hashset)
 - [Removing the First Element of an Array](https://www.baeldung.com/java-array-remove-first-element)
 - [Fail-Safe Iterator vs Fail-Fast Iterator](http://www.baeldung.com/java-fail-safe-vs-fail-fast-iterator)
@@ -47,12 +33,8 @@
 - [Remove All Occurrences of a Specific Value from a List](https://www.baeldung.com/java-remove-value-from-list)
 - [Thread Safe LIFO Data Structure Implementations](https://www.baeldung.com/java-lifo-thread-safe)
 - [Collections.emptyList() vs. New List Instance](https://www.baeldung.com/java-collections-emptylist-new-list)
-- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
 - [Differences Between Collection.clear() and Collection.removeAll()](https://www.baeldung.com/java-collection-clear-vs-removeall)
 - [Performance of contains() in a HashSet vs ArrayList](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
-- [Get the Key for a Value from a Java Map](https://www.baeldung.com/java-map-key-from-value)
 - [Time Complexity of Java Collections](https://www.baeldung.com/java-collections-complexity)
-- [Sort a HashMap in Java](https://www.baeldung.com/java-hashmap-sort)
-- [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max)
 - [Operating on and Removing an Item from Stream](https://www.baeldung.com/java-use-remove-item-stream)
 - [An Introduction to Synchronized Java Collections](https://www.baeldung.com/java-synchronized-collections)

core-java-collections/pom.xml

@@ -14,22 +14,11 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>net.sourceforge.collections</groupId>
-            <artifactId>collections-generic</artifactId>
-            <version>${collections-generic.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
             <version>${commons-collections4.version}</version>
         </dependency>
-        <dependency>
-            <groupId>com.jayway.awaitility</groupId>
-            <artifactId>awaitility</artifactId>
-            <version>${avaitility.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
@@ -67,12 +56,6 @@
             <artifactId>commons-exec</artifactId>
             <version>1.3</version>
         </dependency>
-        
-        <dependency>
-            <groupId>one.util</groupId>
-            <artifactId>streamex</artifactId>
-            <version>0.6.5</version>
-        </dependency>
     </dependencies>
 
     <properties>

core-java/README.md

@@ -29,7 +29,6 @@
 - [AWS Lambda With Java](http://www.baeldung.com/java-aws-lambda)
 - [Introduction to Nashorn](http://www.baeldung.com/java-nashorn)
 - [Chained Exceptions in Java](http://www.baeldung.com/java-chained-exceptions)
-- [A Quick JUnit vs TestNG Comparison](http://www.baeldung.com/junit-vs-testng)
 - [Java Primitive Conversions](http://www.baeldung.com/java-primitive-conversions)
 - [Java Money and the Currency API](http://www.baeldung.com/java-money-and-currency)
 - [JVM Log Forging](http://www.baeldung.com/jvm-log-forging)
@@ -150,9 +149,11 @@
 - [Throw Exception in Optional in Java 8](https://www.baeldung.com/java-optional-throw-exception)
 - [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
 - [Synthetic Constructs in Java](https://www.baeldung.com/java-synthetic)
+- [Calculating the nth Root in Java](https://www.baeldung.com/java-nth-root)
 - [Convert Double to String, Removing Decimal Places](https://www.baeldung.com/java-double-to-string)
 - [Different Ways to Capture Java Heap Dumps](https://www.baeldung.com/java-heap-dump-capture)
 - [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
 - [ZoneOffset in Java](https://www.baeldung.com/java-zone-offset)
 - [Hashing a Password in Java](https://www.baeldung.com/java-password-hashing)
 - [Java Switch Statement](https://www.baeldung.com/java-switch)
+- [The Modulo Operator in Java](https://www.baeldung.com/modulo-java)

java-collections-conversions/README.md

@@ -0,0 +1,11 @@
+=========
+
+## Java Collections Cookbooks and Examples
+
+### Relevant Articles: 
+- [Converting between an Array and a List in Java](http://www.baeldung.com/convert-array-to-list-and-list-to-array)
+- [Converting between an Array and a Set in Java](http://www.baeldung.com/convert-array-to-set-and-set-to-array)
+- [Converting between a List and a Set in Java](http://www.baeldung.com/convert-list-to-set-and-set-to-list)
+- [Convert a Map to an Array, List or Set in Java](http://www.baeldung.com/convert-map-values-to-array-list-set)
+- [Converting a List to String in Java](http://www.baeldung.com/java-list-to-string)
+- [How to Convert List to Map in Java](http://www.baeldung.com/java-list-to-map)

java-collections-conversions/pom.xml

@@ -0,0 +1,40 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>java-collections-conversions</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>java-collections-conversions</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <commons-lang3.version>3.5</commons-lang3.version>
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <assertj.version>3.6.1</assertj.version>
+    </properties>
+</project>

java-collections-maps/README.md

@@ -0,0 +1,18 @@
+=========
+
+## Java Collections Cookbooks and Examples
+
+### Relevant Articles: 
+- [Guide to WeakHashMap in Java](http://www.baeldung.com/java-weakhashmap)
+- [Guide to the Guava BiMap](http://www.baeldung.com/guava-bimap)
+- [The Java HashMap Under the Hood](http://www.baeldung.com/java-hashmap)
+- [A Guide to LinkedHashMap in Java](http://www.baeldung.com/java-linked-hashmap)
+- [A Guide to TreeMap in Java](http://www.baeldung.com/java-treemap)
+- [Iterate over a Map in Java](http://www.baeldung.com/java-iterate-map)
+- [Java TreeMap vs HashMap](http://www.baeldung.com/java-treemap-vs-hashmap)
+- [How to Store Duplicate Keys in a Map in Java?](http://www.baeldung.com/java-map-duplicate-keys)
+- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
+- [Get the Key for a Value from a Java Map](https://www.baeldung.com/java-map-key-from-value)
+- [Sort a HashMap in Java](https://www.baeldung.com/java-hashmap-sort)
+- [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max)
+- [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)

java-collections-maps/pom.xml

@@ -0,0 +1,54 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>java-collections-maps</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>java-collections-maps</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.jayway.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <version>${avaitility.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>one.util</groupId>
+            <artifactId>streamex</artifactId>
+            <version>0.6.5</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <commons-lang3.version>3.5</commons-lang3.version>
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <collections-generic.version>4.01</collections-generic.version>
+        <avaitility.version>1.7.0</avaitility.version>
+        <assertj.version>3.6.1</assertj.version>
+        <eclipse.collections.version>7.1.0</eclipse.collections.version>
+    </properties>
+</project>

parent-spring-4/pom.xml

@@ -29,7 +29,7 @@
     </dependencies>
 
     <properties>
-        <spring.version>4.3.17.RELEASE</spring.version>
+        <spring.version>4.3.20.RELEASE</spring.version>
         <junit.jupiter.version>5.0.2</junit.jupiter.version>
     </properties>
 

persistence-modules/core-java-persistence/pom.xml

@@ -1,71 +1,71 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung.core-java-persistence</groupId>
-    <artifactId>core-java-persistence</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <packaging>jar</packaging>
-    <name>core-java-persistence</name>
-    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-java</relativePath>
-    </parent>
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj-core.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.h2database</groupId>
-            <artifactId>h2</artifactId>
-            <version>${h2database.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-dbcp2</artifactId>
-            <version>${commons-dbcp2.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.zaxxer</groupId>
-            <artifactId>HikariCP</artifactId>
-            <version>${HikariCP.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.mchange</groupId>
-            <artifactId>c3p0</artifactId>
-            <version>${c3p0.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework</groupId>
-            <artifactId>spring-web</artifactId>
-            <version>${springframework.spring-web.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter</artifactId>
-            <version>${springframework.boot.spring-boot-starter.version}</version>
-        </dependency>
-    </dependencies>
-    <build>
-        <finalName>core-java-persistence</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
-    </build>    
-    <properties>
-        <assertj-core.version>3.10.0</assertj-core.version>
-        <h2database.version>1.4.197</h2database.version>
-        <commons-dbcp2.version>2.4.0</commons-dbcp2.version>
-        <HikariCP.version>3.2.0</HikariCP.version>
-        <c3p0.version>0.9.5.2</c3p0.version>
-        <springframework.boot.spring-boot-starter.version>1.5.8.RELEASE</springframework.boot.spring-boot-starter.version>
-        <springframework.spring-web.version>4.3.4.RELEASE</springframework.spring-web.version>
-    </properties>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung.core-java-persistence</groupId>
+    <artifactId>core-java-persistence</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>core-java-persistence</name>
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-java</relativePath>
+    </parent>
+    <dependencies>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj-core.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>${h2database.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-dbcp2</artifactId>
+            <version>${commons-dbcp2.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.zaxxer</groupId>
+            <artifactId>HikariCP</artifactId>
+            <version>${HikariCP.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.mchange</groupId>
+            <artifactId>c3p0</artifactId>
+            <version>${c3p0.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${springframework.spring-web.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+            <version>${springframework.boot.spring-boot-starter.version}</version>
+        </dependency>
+    </dependencies>
+    <build>
+        <finalName>core-java-persistence</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>    
+    <properties>
+        <assertj-core.version>3.10.0</assertj-core.version>
+        <h2database.version>1.4.197</h2database.version>
+        <commons-dbcp2.version>2.4.0</commons-dbcp2.version>
+        <HikariCP.version>3.2.0</HikariCP.version>
+        <c3p0.version>0.9.5.2</c3p0.version>
+        <springframework.boot.spring-boot-starter.version>1.5.8.RELEASE</springframework.boot.spring-boot-starter.version>
+        <springframework.spring-web.version>4.3.4.RELEASE</springframework.spring-web.version>
+    </properties>
 </project>

persistence-modules/core-java-persistence/src/test/java/com/baeldung/connectionpool/BasicConnectionPoolUnitTest.java

@@ -1,67 +1,67 @@
-package com.baeldung.connectionpool;
-
-import java.sql.Connection;
-import java.sql.SQLException;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-import org.junit.BeforeClass;
-import org.junit.Test;
-
-public class BasicConnectionPoolUnitTest {
-    
-    private static ConnectionPool connectionPool;
-
-    @BeforeClass
-    public static void setUpBasicConnectionPoolInstance() throws SQLException {
-        connectionPool = BasicConnectionPool.create("jdbc:h2:mem:test", "user", "password");
-    }
-    
-    @Test
-    public void givenBasicConnectionPoolInstance_whenCalledgetConnection_thenCorrect() throws Exception {
-        assertTrue(connectionPool.getConnection().isValid(1));
-    }
-    
-    @Test
-    public void givenBasicConnectionPoolInstance_whenCalledreleaseConnection_thenCorrect() throws Exception {
-        Connection connection = connectionPool.getConnection();
-        assertThat(connectionPool.releaseConnection(connection)).isTrue();
-    }
-    
-    @Test
-    public void givenBasicConnectionPoolInstance_whenCalledgetUrl_thenCorrect() {
-        assertThat(connectionPool.getUrl()).isEqualTo("jdbc:h2:mem:test");
-    }
-    
-    @Test
-    public void givenBasicConnectionPoolInstance_whenCalledgetUser_thenCorrect() {
-        assertThat(connectionPool.getUser()).isEqualTo("user");
-    }
-    
-    @Test
-    public void givenBasicConnectionPoolInstance_whenCalledgetPassword_thenCorrect() {
-        assertThat(connectionPool.getPassword()).isEqualTo("password");
-    }
-
-    @Test(expected = RuntimeException.class)
-    public void givenBasicConnectionPoolInstance_whenAskedForMoreThanMax_thenError() throws Exception {
-        // this test needs to be independent so it doesn't share the same connection pool as other tests
-        ConnectionPool cp = BasicConnectionPool.create("jdbc:h2:mem:test", "user", "password");
-        final int MAX_POOL_SIZE = 20;
-        for (int i = 0; i < MAX_POOL_SIZE + 1; i++) {
-            cp.getConnection();
-        }
-        fail();
-    }
-
-    @Test
-    public void givenBasicConnectionPoolInstance_whenSutdown_thenEmpty() throws Exception {
-        ConnectionPool cp = BasicConnectionPool.create("jdbc:h2:mem:test", "user", "password");
-        assertThat(((BasicConnectionPool)cp).getSize()).isEqualTo(10);
-
-        ((BasicConnectionPool) cp).shutdown();
-        assertThat(((BasicConnectionPool)cp).getSize()).isEqualTo(0);
-    }
-}
+package com.baeldung.connectionpool;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+public class BasicConnectionPoolUnitTest {
+    
+    private static ConnectionPool connectionPool;
+
+    @BeforeClass
+    public static void setUpBasicConnectionPoolInstance() throws SQLException {
+        connectionPool = BasicConnectionPool.create("jdbc:h2:mem:test", "user", "password");
+    }
+    
+    @Test
+    public void givenBasicConnectionPoolInstance_whenCalledgetConnection_thenCorrect() throws Exception {
+        assertTrue(connectionPool.getConnection().isValid(1));
+    }
+    
+    @Test
+    public void givenBasicConnectionPoolInstance_whenCalledreleaseConnection_thenCorrect() throws Exception {
+        Connection connection = connectionPool.getConnection();
+        assertThat(connectionPool.releaseConnection(connection)).isTrue();
+    }
+    
+    @Test
+    public void givenBasicConnectionPoolInstance_whenCalledgetUrl_thenCorrect() {
+        assertThat(connectionPool.getUrl()).isEqualTo("jdbc:h2:mem:test");
+    }
+    
+    @Test
+    public void givenBasicConnectionPoolInstance_whenCalledgetUser_thenCorrect() {
+        assertThat(connectionPool.getUser()).isEqualTo("user");
+    }
+    
+    @Test
+    public void givenBasicConnectionPoolInstance_whenCalledgetPassword_thenCorrect() {
+        assertThat(connectionPool.getPassword()).isEqualTo("password");
+    }
+
+    @Test(expected = RuntimeException.class)
+    public void givenBasicConnectionPoolInstance_whenAskedForMoreThanMax_thenError() throws Exception {
+        // this test needs to be independent so it doesn't share the same connection pool as other tests
+        ConnectionPool cp = BasicConnectionPool.create("jdbc:h2:mem:test", "user", "password");
+        final int MAX_POOL_SIZE = 20;
+        for (int i = 0; i < MAX_POOL_SIZE + 1; i++) {
+            cp.getConnection();
+        }
+        fail();
+    }
+
+    @Test
+    public void givenBasicConnectionPoolInstance_whenSutdown_thenEmpty() throws Exception {
+        ConnectionPool cp = BasicConnectionPool.create("jdbc:h2:mem:test", "user", "password");
+        assertThat(((BasicConnectionPool)cp).getSize()).isEqualTo(10);
+
+        ((BasicConnectionPool) cp).shutdown();
+        assertThat(((BasicConnectionPool)cp).getSize()).isEqualTo(0);
+    }
+}

persistence-modules/core-java-persistence/src/test/java/com/baeldung/connectionpool/C3poDataSourceUnitTest.java

@@ -1,13 +1,13 @@
-package com.baeldung.connectionpool;
-
-import java.sql.SQLException;
-import static org.junit.Assert.assertTrue;
-import org.junit.Test;
-
-public class C3poDataSourceUnitTest {
-    
-    @Test
-    public void givenC3poDataSourceClass_whenCalledgetConnection_thenCorrect() throws SQLException {
-        assertTrue(C3poDataSource.getConnection().isValid(1));
-    }   
+package com.baeldung.connectionpool;
+
+import java.sql.SQLException;
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+
+public class C3poDataSourceUnitTest {
+    
+    @Test
+    public void givenC3poDataSourceClass_whenCalledgetConnection_thenCorrect() throws SQLException {
+        assertTrue(C3poDataSource.getConnection().isValid(1));
+    }   
 }

persistence-modules/core-java-persistence/src/test/java/com/baeldung/connectionpool/DBCPDataSourceUnitTest.java

@@ -1,13 +1,13 @@
-package com.baeldung.connectionpool;
-
-import java.sql.SQLException;
-import static org.junit.Assert.assertTrue;
-import org.junit.Test;
-
-public class DBCPDataSourceUnitTest {
-    
-    @Test
-    public void givenDBCPDataSourceClass_whenCalledgetConnection_thenCorrect() throws SQLException {
-        assertTrue(DBCPDataSource.getConnection().isValid(1));
-    }   
+package com.baeldung.connectionpool;
+
+import java.sql.SQLException;
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+
+public class DBCPDataSourceUnitTest {
+    
+    @Test
+    public void givenDBCPDataSourceClass_whenCalledgetConnection_thenCorrect() throws SQLException {
+        assertTrue(DBCPDataSource.getConnection().isValid(1));
+    }   
 }

persistence-modules/core-java-persistence/src/test/java/com/baeldung/connectionpool/HikariCPDataSourceUnitTest.java

@@ -1,13 +1,13 @@
-package com.baeldung.connectionpool;
-
-import java.sql.SQLException;
-import static org.junit.Assert.assertTrue;
-import org.junit.Test;
-
-public class HikariCPDataSourceUnitTest {
-    
-    @Test
-    public void givenHikariDataSourceClass_whenCalledgetConnection_thenCorrect() throws SQLException {
-        assertTrue(HikariCPDataSource.getConnection().isValid(1));
-    }   
+package com.baeldung.connectionpool;
+
+import java.sql.SQLException;
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+
+public class HikariCPDataSourceUnitTest {
+    
+    @Test
+    public void givenHikariDataSourceClass_whenCalledgetConnection_thenCorrect() throws SQLException {
+        assertTrue(HikariCPDataSource.getConnection().isValid(1));
+    }   
 }

persistence-modules/deltaspike/pom.xml

@@ -14,6 +14,7 @@
         <groupId>com.baeldung</groupId>
         <artifactId>parent-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../../</relativePath>
     </parent>
 
     <dependencies>