package com.atlassian.plugin.loaders;
   
   import com.google.common.collect.ImmutableMap;
   import org.dom4j.DocumentHelper;
   import org.dom4j.Element;
   import org.junit.Test;
   
   import java.util.HashMap;
   import java.util.Map;
  
  import static org.junit.Assert.assertEquals;
  
  public class LoaderUtilsTest {
      @Test
      public void noParamsMeansAnEmptyMap() {
          Element element = DocumentHelper.createElement("parent");
          assertEquals(ImmutableMap.of(), LoaderUtils.getParams(element));
      }
  
      @Test
      public void getParamsWorksWhenNameAndValueAreSpecified() {
          Element element = DocumentHelper.createElement("parent");
  
          Element param = DocumentHelper.createElement("param");
          param.addAttribute("name", "param-name");
          param.addAttribute("value", "param-value");
          element.add(param);
  
          assertEquals(ImmutableMap.of("param-name", "param-value"),
                  LoaderUtils.getParams(element));
      }
  
      /**
       * Allowing maps with null keys and values into the system is not a good idea.
       * This test is to document current behaviour.
       */
      @Test
      public void getParamsReturnsNullMapWhenNameAndValueAreOmitted() {
          Element element = DocumentHelper.createElement("parent");
  
          Element param = DocumentHelper.createElement("param");
          element.add(param);
  
          Map<String, String> expected = new HashMap<>();
          expected.put(null, null);
  
          assertEquals(expected,
                  LoaderUtils.getParams(element));
      }
  
      @Test
      public void valueIsTakenFromElementContentIfNoValueSet() {
          Element element = DocumentHelper.createElement("parent");
  
          Element param = DocumentHelper.createElement("param");
          param.addAttribute("name", "param-name");
          param.addText("param-content");
          element.add(param);
  
          assertEquals(ImmutableMap.of("param-name", "param-content"),
                  LoaderUtils.getParams(element));
      }
  }