Improve test on empty crate comparison.

Author: Pfeil

src/main/java/edu/kit/datamanager/ro_crate/entities/AbstractEntity.java

@@ -91,6 +91,14 @@ public Set<String> getLinkedTo() {
     return linkedTo;
   }
 
+  /**
+   * Returns the types of this entity.
+   * @return a set of type strings.
+   */
+  public Set<String> getTypes() {
+    return types;
+  }
+
   /**
    * Returns a Json object containing the properties of the entity.
    *

src/test/java/edu/kit/datamanager/ro_crate/crate/BuilderTest.java

@@ -38,6 +38,8 @@ void testEmptyCrates() throws JsonProcessingException {
 
     assertEquals(built.getAllDataEntities(), constructed.getAllDataEntities());
     assertEquals(built.getAllContextualEntities(), constructed.getAllContextualEntities());
+    assertEquals(built.getJsonDescriptor().getTypes(), constructed.getJsonDescriptor().getTypes());
+    assertEquals(built.getJsonDescriptor().getProperties(), constructed.getJsonDescriptor().getProperties());
     HelpFunctions.compareTwoCrateJson(built, constructed);
   }
 }