Test to assert mainnet configuration is valid

[newhoggy]

Ensures that configuration/cardano/mainnet-config.json is always valid.

[newhoggy]

When the mainnet configuration has a bad hash, the test fails in the following way:

test/Spec.hs
  Spec
    Spec.Config.Mainnet: FAIL (0.32s)
        ✗ Spec.Config.Mainnet failed
          after 1 test.

             ┏━━ test/Spec/Config/Mainnet.hs ━━━
          42 ┃ hprop_configMainnet :: Property
          43 ┃ hprop_configMainnet = H.propertyOnce $ do
          44 ┃   projectBase <- H.note =<< H.evalIO . IO.canonicalizePath =<< H.getProjectBase
             ┃   │ /Users/jky/wrk/iohk/cardano-node
          45 ┃   result <- H.evalIO $ runExceptT $ initialLedgerState $ projectBase </> "configuration/cardano/mainnet-config.json"
          46 ┃   case result of
          47 ┃     Right (env, ledgerState) -> True === True
          48 ┃     Left e -> H.failWithCustom GHC.callStack Nothing (T.unpack (renderInitialLedgerStateError e))

          Failed to read or parse a genesis file linked from the network config file: Failed reading Byron genesis file "/Users/jky/wrk/iohk/cardano-node/configuration/cardano/mainnet-byron-genesis.json": GenesisHashMismatch (GenesisHash {unGenesisHash = 5f20df933584822601f9e3f8c024eb5eb252fe8cefb24d1317dc3d432e940ebb}) 5f20df933584822601f9e3f8c024eb5eb252fe8cefb24d1317dc3d432e940eb0

          This failure can be reproduced by running:
          > recheck (Size 0) (Seed 37402807113868204 7424638759470100821) Spec.Config.Mainnet

      Use '--hedgehog-replay "Size 0 Seed 37402807113868204 7424638759470100821"' to reproduce.

[Jimbo4350]

Hm...this test would probably be better placed in cardano-cli as we aren't starting a testnet to run it.

[newhoggy]

Moved the tests.

[Jimbo4350]

LGTM! Just squash the commits before merging 👍

[newhoggy]

bors merge

[iohk-bors]

Build succeeded:

• ci/hydra-build:required
• buildkite/cardano-node