is it sourceContainer vs targetContainer?

Author: bcully

server/src/test/java/org/elasticsearch/common/blobstore/fs/FsBlobContainerTests.java

@@ -395,7 +395,9 @@ public void testCopy() throws IOException {
             () -> sourceContainer.copyBlob(randomPurpose(), sourceBlobName, targetContainer, targetBlobName, true)
         );
 
+        var sourceContents = Streams.readFully(sourceContainer.readBlob(randomPurpose(), sourceBlobName));
         var targetContents = Streams.readFully(targetContainer.readBlob(randomPurpose(), targetBlobName));
+        assertEquals(sourceContents, targetContents);
         assertEquals(contents, targetContents);
     }