Metacat

It would be a good start to be able to insert a single test EML document into the index and then be able to query the index using different fields to show that the document is found, and also not found based on different queries. We can expand on this basic motif as more features are added (ORE packaging, access control, etc).

These tests should run with only minimal configuration of Metacat and should not rely on any resources external to what is included in the Metacat project or what Metacat can reasonably pull in during build time. See existing test packages for examples/templates.