Add test-case for issue #278

(cherry picked from commit 25f2da3)

Author: cboehme

metafacture-biblio/src/test/java/org/metafacture/biblio/marc21/Marc21EncoderTest.java

@@ -15,6 +15,8 @@
  */
 package org.metafacture.biblio.marc21;
 
+import static org.metafacture.biblio.marc21.Marc21EventNames.LEADER_ENTITY;
+import static org.metafacture.biblio.marc21.Marc21EventNames.RECORD_STATUS_LITERAL;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.matches;
 import static org.mockito.Mockito.verify;
@@ -35,8 +37,6 @@
  */
 public final class Marc21EncoderTest {
 
-    private static final String LEADER_LITERAL = "leader";
-
     private Marc21Encoder marc21Encoder;
 
     @Mock
@@ -102,4 +102,15 @@ public void issue231ShouldIgnoreTypeLiterals() {
         verify(receiver).process(any(String.class));
     }
 
+    @Test
+    public void issue278ShouldNotFailWhenProcessingLeaderEntity() {
+        marc21Encoder.startRecord("");
+        marc21Encoder.startEntity(LEADER_ENTITY);
+        marc21Encoder.literal(RECORD_STATUS_LITERAL, "a");
+        marc21Encoder.endEntity();
+        marc21Encoder.endRecord();
+
+        verify(receiver).process(any(String.class));
+    }
+
 }