InterpreterFactoryTest.java

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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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package org.apache.zeppelin.interpreter;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Properties;

import org.apache.commons.lang.NullArgumentException;
import org.apache.zeppelin.conf.ZeppelinConfiguration;
import org.apache.zeppelin.conf.ZeppelinConfiguration.ConfVars;
import org.apache.zeppelin.interpreter.mock.MockInterpreter1;
import org.apache.zeppelin.interpreter.mock.MockInterpreter2;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class InterpreterFactoryTest {

	private InterpreterFactory factory;
  private File tmpDir;
  private ZeppelinConfiguration conf;
  private InterpreterContext context;

  @Before
	public void setUp() throws Exception {
    tmpDir = new File(System.getProperty("java.io.tmpdir")+"/ZeppelinLTest_"+System.currentTimeMillis());
    tmpDir.mkdirs();
    new File(tmpDir, "conf").mkdirs();

    MockInterpreter1.register("mock1", "org.apache.zeppelin.interpreter.mock.MockInterpreter1");
	  MockInterpreter2.register("mock2", "org.apache.zeppelin.interpreter.mock.MockInterpreter2");

	  System.setProperty(ConfVars.ZEPPELIN_HOME.getVarName(), tmpDir.getAbsolutePath());
	  System.setProperty(ConfVars.ZEPPELIN_INTERPRETERS.getVarName(), "org.apache.zeppelin.interpreter.mock.MockInterpreter1,org.apache.zeppelin.interpreter.mock.MockInterpreter2");
	  conf = new ZeppelinConfiguration();
	  factory = new InterpreterFactory(conf, new InterpreterOption(false), null);
	  context = new InterpreterContext("note", "id", "title", "text", null, null, null, null);

	}

	@After
	public void tearDown() throws Exception {
	  delete(tmpDir);
	}

  private void delete(File file){
    if(file.isFile()) file.delete();
    else if(file.isDirectory()){
      File [] files = file.listFiles();
      if(files!=null && files.length>0){
        for(File f : files){
          delete(f);
        }
      }
      file.delete();
    }
  }

	@Test
	public void testBasic() {
	  List<String> all = factory.getDefaultInterpreterSettingList();

		// get interpreter
		Interpreter repl1 = factory.get(all.get(0)).getInterpreterGroup().getFirst();
		assertFalse(((LazyOpenInterpreter) repl1).isOpen());
		repl1.interpret("repl1", context);
		assertTrue(((LazyOpenInterpreter) repl1).isOpen());

		// try to get unavailable interpreter
		assertNull(factory.get("unknown"));

		// restart interpreter
		factory.restart(all.get(0));
		repl1 = factory.get(all.get(0)).getInterpreterGroup().getFirst();
		assertFalse(((LazyOpenInterpreter) repl1).isOpen());
	}

  @Test
  public void testFactoryDefaultList() throws IOException {
    // get default list from default setting
    List<String> all = factory.getDefaultInterpreterSettingList();
    assertEquals(2, all.size());
    assertEquals(factory.get(all.get(0)).getInterpreterGroup().getFirst().getClassName(), "org.apache.zeppelin.interpreter.mock.MockInterpreter1");

    // add setting
    factory.add("a mock", "mock2", new InterpreterOption(false), new Properties());
    all = factory.getDefaultInterpreterSettingList();
    assertEquals(2, all.size());
    assertEquals("mock1", factory.get(all.get(0)).getName());
    assertEquals("a mock", factory.get(all.get(1)).getName());
  }

  @Test
  public void testExceptions() throws IOException {
    List<String> all = factory.getDefaultInterpreterSettingList();
    // add setting with null option & properties expected nullArgumentException.class
    try {
      factory.add("a mock", "mock2", null, new Properties());
    } catch(NullArgumentException e) {
        assertEquals("Test null option" , e.getMessage(),new NullArgumentException("option").getMessage());
      }
    try {
      factory.add("a mock" , "mock2" , new InterpreterOption(false),null);
    } catch (NullArgumentException e){
      assertEquals("Test null properties" , e.getMessage(),new NullArgumentException("properties").getMessage());
    }
  }


  @Test
  public void testSaveLoad() throws InterpreterException, IOException {
    // interpreter settings
    assertEquals(2, factory.get().size());

    // check if file saved
    assertTrue(new File(conf.getInterpreterSettingPath()).exists());

    factory.add("newsetting", "mock1", new InterpreterOption(false), new Properties());
    assertEquals(3, factory.get().size());

    InterpreterFactory factory2 = new InterpreterFactory(conf, null);
    assertEquals(3, factory2.get().size());
  }
}