HBase uses JUnit 4 for unit tests

This example will add unit tests to the following example class:

public class MyHBaseDAO {

    public static void insertRecord(HTableInterface table, HBaseTestObj obj)
    throws Exception {
        Put put = createPut(obj);
        table.put(put);
    }
    
    private static Put createPut(HBaseTestObj obj) {
        Put put = new Put(Bytes.toBytes(obj.getRowKey()));
        put.add(Bytes.toBytes("CF"), Bytes.toBytes("CQ-1"),
                    Bytes.toBytes(obj.getData1()));
        put.add(Bytes.toBytes("CF"), Bytes.toBytes("CQ-2"),
                    Bytes.toBytes(obj.getData2()));
        return put;
    }
}                
            

The first step is to add JUnit dependencies to your Maven POM file:

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
</dependency>                
                

Next, add some unit tests to your code. Tests are annotated with @Test. Here, the unit tests are in bold.

public class TestMyHbaseDAOData {
  @Test
  public void testCreatePut() throws Exception {
  HBaseTestObj obj = new HBaseTestObj();
  obj.setRowKey("ROWKEY-1");
  obj.setData1("DATA-1");
  obj.setData2("DATA-2");
  Put put = MyHBaseDAO.createPut(obj);
  assertEquals(obj.getRowKey(), Bytes.toString(put.getRow()));
  assertEquals(obj.getData1(), Bytes.toString(put.get(Bytes.toBytes("CF"), Bytes.toBytes("CQ-1")).get(0).getValue()));
  assertEquals(obj.getData2(), Bytes.toString(put.get(Bytes.toBytes("CF"), Bytes.toBytes("CQ-2")).get(0).getValue()));
  }
}                
            

These tests ensure that your createPut method creates, populates, and returns a Put object with expected values. Of course, JUnit can do much more than this. For an introduction to JUnit, see https://github.com/junit-team/junit/wiki/Getting-started.