added test for error being thrown when payload oxum doesn't exist and a

quick verify is performed

Author: jscancella

src/test/java/gov/loc/repository/bagit/verify/BagVerifierTest.java

@@ -27,6 +27,7 @@
 import gov.loc.repository.bagit.exceptions.MissingBagitFileException;
 import gov.loc.repository.bagit.exceptions.MissingPayloadDirectoryException;
 import gov.loc.repository.bagit.exceptions.MissingPayloadManifestException;
+import gov.loc.repository.bagit.exceptions.PayloadOxumDoesNotExistException;
 import gov.loc.repository.bagit.hash.StandardSupportedAlgorithms;
 import gov.loc.repository.bagit.reader.BagReader;
 
@@ -65,6 +66,13 @@ public void testQuickVerify() throws Exception{
     sut.quicklyVerify(bag, true);
   }
 
+  @Test(expected=PayloadOxumDoesNotExistException.class)
+  public void testExceptionIsThrownWhenPayloadOxumDoesntExist() throws Exception{
+    Bag bag = reader.read(rootDir);
+    sut.quicklyVerify(bag, true);
+    
+  }
+  
   @Test(expected=InvalidPayloadOxumException.class)
   public void testInvalidByteSizeForQuickVerify() throws Exception{
     Path badRootDir = Paths.get(getClass().getClassLoader().getResource("badPayloadOxumByteSize/bag").toURI());