Add proper tests #2
Description
Add a test which works with both GHCJS and GHC: ask the real API e.g. https://rata.digitraffic.fi/api/v1/metadata/train-types
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Add a test which works with both GHCJS and GHC: ask the real API e.g. https://rata.digitraffic.fi/api/v1/metadata/train-types