private void verifyStartupFailure(BlobStore blobStore, StoreErrorCodes expectedErrorCode) {
    try {
      blobStore.start();
      fail("Store start should have failed");
    } catch (StoreException e) {
      assertEquals("Unexpected StoreErrorCode", expectedErrorCode, e.getErrorCode());
    }
  }
Verifies that {@link BlobStore#start()} fails.
@param blobStore the {@link BlobStore} to start.
@param expectedErrorCode the expected {@link StoreErrorCodes} for the failure.
ambry-store/src/test/java/com/github/ambry/store/BlobStoreTest.java