| # Single Operator Unit Test |
| |
| It is possible to run an end to end test of an operator in isolation by extending |
| [PhysicalOpUnitTestBase](../../exec/java-exec/src/test/java/org/apache/drill/exec/physical/unit/PhysicalOpUnitTestBase.java). |
| |
| A simple example of an operator level unit test is the following: |
| |
| ``` |
| public class BasicPhysicalOpUnitTest extends PhysicalOpUnitTestBase { |
| |
| @Test |
| public void testSimpleProject() { |
| Project projectConf = new Project(parseExprs("x+5", "x"), null); |
| List<String> jsonBatches = Lists.newArrayList( |
| "[{\"x\": 5 },{\"x\": 10 }]", |
| "[{\"x\": 20 },{\"x\": 30 },{\"x\": 40 }]"); |
| opTestBuilder() |
| .physicalOperator(projectConf) |
| .inputDataStreamJson(jsonBatches) |
| .baselineColumns("x") |
| .baselineValues(10l) |
| .baselineValues(15l) |
| .baselineValues(25l) |
| .baselineValues(35l) |
| .baselineValues(45l) |
| .go(); |
| } |
| } |
| |
| ``` |
| |
