/*
 *  Copyright 2017 TWO SIGMA OPEN SOURCE, LLC
 *
 *  Licensed 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
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.twosigma.beaker.scala.handler;

import com.twosigma.beaker.scala.ScalaKernelMock;
import com.twosigma.jupyter.message.Header;
import com.twosigma.jupyter.message.Message;
import com.twosigma.jupyter.message.MessageTest;
import org.assertj.core.api.Assertions;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import java.io.Serializable;
import java.util.Map;

import static com.twosigma.beaker.jupyter.msg.JupyterMessages.KERNEL_INFO_REPLY;

public class ScalaKernelInfoHandlerTest {

  private Message message;
  private static ScalaKernelMock kernel;
  private static ScalaKernelInfoHandler handler;

  @BeforeClass
  public static void setUpClass() throws Exception {
    kernel = new ScalaKernelMock();
    handler =  new ScalaKernelInfoHandler(kernel);
  }

  @Before
  public void setUp() throws Exception {
    message = MessageTest.createMessage();
  }

  @After
  public void tearDown() throws Exception {
    kernel.clearSentMessages();
  }

  @Test
  public void handle_shouldSendMessage() throws Exception {
    //when
    handler.handle(message);
    //then
    Assertions.assertThat(kernel.getSentMessages()).isNotEmpty();
  }

  @Test
  public void handle_sentMessageHasContent() throws Exception {
    //when
    handler.handle(message);
    //then
    Message sentMessage = kernel.getSentMessages().get(0);
    Assertions.assertThat(sentMessage.getContent()).isNotEmpty();
  }

  @Test
  public void handle_sentMessageHasHeaderTypeIsKernelInfoReply() throws Exception {
    //when
    handler.handle(message);
    //then
    Message sentMessage = kernel.getSentMessages().get(0);
    Header header = sentMessage.getHeader();
    Assertions.assertThat(header).isNotNull();
    Assertions.assertThat(header.getType()).isEqualTo(KERNEL_INFO_REPLY.getName());
  }

  @Test
  public void handle_sentMessageHasLanguageInfo() throws Exception {
    //when
    handler.handle(message);
    //then
    Message sentMessage = kernel.getSentMessages().get(0);
    Map<String, Serializable> map = sentMessage.getContent();
    Assertions.assertThat(map).isNotNull();
    Assertions.assertThat(map.get("language_info")).isNotNull();
  }

  @Test
  public void handle_messageContentHasScalaLabel() throws Exception {
    //when
    handler.handle(message);
    //then
    Message sentMessage = kernel.getSentMessages().get(0);
    Map<String, Serializable> map = sentMessage.getContent();
    Assertions.assertThat(map).isNotNull();
    Assertions.assertThat(map.get("implementation")).isEqualTo("scala");
  }

}