Github user tomatophantastico commented on the issue: https://github.com/apache/metamodel/pull/158 I found those "toString" test to be quite problematic too, even in small tests and i encountered a lot of them during the arrays->collection conversion and i would be happy to see them phased out, even the small ones. The schema uses a lot of interfaces but tests against the string serialisation, which is meant for human consumption. `assertTrue(Lists.newArrayList("a","b").equals(table.getColumnNames()))` is short, but does not depend on the toString() of the implementing List.
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