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7669 :: Testing that a macro throws an exception

• zidsal2 (orginal) [2021-03-20T17:21:57+01:00] view original

  I'm currently trying to test that my macro throws an exception if you give it a malformed file I've gone down the route of using testament for this as its the only way I can see this working as I'm expecting my test to not compile! however when I run my testament test it returns a reFilesDiffer

  discard """
    errormsg: "unhandled exception: missing `sheets` attribute [CastleDbError]"
    line: 6
  """
  import castledb
  generateCastleDbModel("""{}""", exportTypes = false)     #this is a macro from the castledb module that throws a CastleDbError
  Run

  the output of testament was as followed

  
  $ testament r tests/tcastledb_macro_errors.nim
  FAIL: tests/tcastledb_macro_errors.nim C
  Test "tests\tcastledb_macro_errors.nim" in category "tests"
  Failure: reFilesDiffer
  Expected:
  tests\tcastledb_macro_errors.nim
  
  Gotten:
  castledb.nim
  
  FAILURE! total: 1 passed: 0 skipped: 0 failed: 1
  Run

  I think I am getting this error as its the castledb module that throws the exception instead of the exception being thrown in the test file. Is there anyway around this? I've tried using include instead of import

  testing that a macro throws an exception

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• DeletedUser (orginal) [2021-03-20T22:42:26+01:00] view original

  You can use the error proc to have user defined errors in macros, and you can give it a node argument that helps with line and column information.

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• zidsal2 (orginal) [2021-03-20T23:57:54+01:00] view original

  Hi Hlaaftana, that does infact raise the error however testament still fails for Failure: reFilesDiffer

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• zidsal2 (orginal) [2021-03-23T21:26:46+01:00] view original

  After digging through the testament code I've found an undocumented part of testament that solves this. The final output is the following

  
  discard """
    errormsg: "missing `sheets` attribute"
    file: "castledb.nim"
  """
  import castledb
  generateCastleDbModel("test.json", """{}""", exportTypes = false)     #this is a macro from the castledb module that throws a CastleDbError
  Run

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