Testing with Aliens: How to test a JPA type converter with Arquillian (http://www.thoughts-on-java.org/2014/06/testing-with-aliens-how-to-test-jpa.html)

cc.yml

CreditCard:
  - id: 1
    name: My Name
    ccNumber: egFfkhd8cRh82tvsh3VVUg==

CryptoConverter.java

@Converter
public class CryptoConverter implements AttributeConverter<String, String> {

    private static final String ALGORITHM = "AES/ECB/PKCS5Padding";
    private static final byte[] KEY = "MySuperSecretKey".getBytes();

    @Override
    public String convertToDatabaseColumn(String ccNumber) {
      // do some encryption
      Key key = new SecretKeySpec(KEY, "AES");
      try {
         Cipher c = Cipher.getInstance(ALGORITHM);
         c.init(Cipher.ENCRYPT_MODE, key);
         return Base64.encodeBytes(c.doFinal(ccNumber.getBytes()));
      } catch (Exception e) {
         throw new RuntimeException(e);
      }
    }

    @Override
    public String convertToEntityAttribute(String dbData) {
      // do some decryption
      Key key = new SecretKeySpec(KEY, "AES");
      try {
        Cipher c = Cipher.getInstance(ALGORITHM);
        c.init(Cipher.DECRYPT_MODE, key);
        return new String(c.doFinal(Base64.decode(dbData)));
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    
    ...

    <properties>
        <version.junit>4.11</version.junit>
        <version.arquillian>1.1.3.Final</version.arquillian>
        <version.arquillian_persistence>1.0.0.Alpha7</version.arquillian_persistence>
        <version.wildfly>8.1.0.Final</version.wildfly>
    </properties>

    <dependencyManagement>
        <dependencies>
            ...
            <dependency>
                <groupId>org.jboss.arquillian</groupId>
                <artifactId>arquillian-bom</artifactId>
                <version>${version.arquillian}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        ...
        <dependency>
            <groupId>javax.enterprise</groupId>
            <artifactId>cdi-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${version.junit}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.jboss.arquillian.junit</groupId>
            <artifactId>arquillian-junit-container</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.jboss.arquillian.extension</groupId>
            <artifactId>arquillian-persistence-dbunit</artifactId>
            <version>${version.arquillian_persistence}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

testDeployment.java

@RunWith(Arquillian.class)
public class TestCryptoConverter {

    @Deployment
    public static JavaArchive createDeployment() {
        return ShrinkWrap
                .create(JavaArchive.class)
                .addClasses(CreditCard.class, CryptoConverter.class,
                        TestCryptoConverter.class)
                .addAsManifestResource("META-INF/persistence.xml",
                        "persistence.xml")
                .addAsManifestResource("META-INF/orm.xml", "orm.xml")
                .addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml");
    }

testEncryption.java

    @PersistenceContext
    private EntityManager em;

    @Test
    @ShouldMatchDataSet(value = "data/cc.yml", excludeColumns = "id")
    public void testEncryption() {
        CreditCard cc = new CreditCard();
        cc.setName("My Name");
        cc.setCcNumber("123456789");

        this.em.persist(cc);
    }

testRead.java

    @Test
    @UsingDataSet("data/cc.yml")
    public void testRead() {
        CreditCard cc = this.em
                .createNamedQuery(CreditCard.BY_NUMBER, CreditCard.class)
                .setParameter("number", "123456789").getSingleResult();
        Assert.assertEquals("My Name", cc.getName());
    }