BAEL-4007 Add jpa data equality unit test specs

persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByBusinessKey.java

@@ -0,0 +1,54 @@
+package com.baeldung.jpa.equality;
+
+import javax.persistence.*;
+
+@Entity
+public class EqualByBusinessKey {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private String email;
+
+    public EqualByBusinessKey() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((email == null) ? 0 : email.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (obj instanceof EqualByBusinessKey)
+            if (((EqualByBusinessKey) obj).getEmail() == getEmail())
+                return true;
+
+        return false;
+    }
+
+}

persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualById.java

@@ -0,0 +1,54 @@
+package com.baeldung.jpa.equality;
+
+import javax.persistence.*;
+
+@Entity
+public class EqualById {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private String email;
+
+    public EqualById() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (obj instanceof EqualById)
+            return ((EqualById) obj).getId() == getId();
+
+        return false;
+    }
+
+}

persistence-modules/java-jpa-3/src/main/java/com/baeldung/jpa/equality/EqualByJavaDefault.java

@@ -0,0 +1,38 @@
+package com.baeldung.jpa.equality;
+
+import javax.persistence.*;
+
+@Entity
+public class EqualByJavaDefault implements Cloneable{
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private String email;
+
+    public EqualByJavaDefault() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public Object clone() throws
+            CloneNotSupportedException
+    {
+        return super.clone();
+    }
+}

persistence-modules/java-jpa-3/src/main/resources/META-INF/persistence.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
+             http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
+	version="2.2">
+	<persistence-unit name="jpa-h2-equality">
+		<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
+		<class>com.baeldung.jpa.equality.EqualByJavaDefault</class>
+		<class>com.baeldung.jpa.equality.EqualById</class>
+		<class>com.baeldung.jpa.equality.EqualByBusinessKey</class>
+		<exclude-unlisted-classes>true</exclude-unlisted-classes>
+		<properties>
+			<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
+			<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
+			<property name="javax.persistence.jdbc.user" value="sa" />
+			<property name="javax.persistence.jdbc.password" value="" />
+			<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
+			<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
+			<property name="hibernate.hbm2ddl.auto" value="create-drop" />
+			<property name="show_sql" value="false" />
+			<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false" />
+		</properties>
+	</persistence-unit>
+</persistence>

persistence-modules/java-jpa-3/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT"
+        class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} -
+                %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>