public.extract_marc_field( TEXT, BIGINT, TEXT, TEXT ) needs test

[Liam Whalen]

Test Writing Day - 2015/08/14

public.extract_marc_field( TEXT, BIGINT, TEXT, TEXT ) is a potential target for tests.

Do not confuse this with public.extract_marc_field( TEXT, BIGINT, TEXT, TEXT ) RETURNS SETOF TEXT.

While writing this test, a similar test should work for public.extract_marc_field( TEXT, BIGINT, TEXT ).