elm-test-extra
Write concise tests for JSON decoders and more
MIT License
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Ecosystems:
Elm
elm-test-extra
Extra expectations, fuzzers, testers and describers.
elm package install ktonon/elm-test-extra
Example: Describing JSON Decoders
Write concise test for JSON decoders.
Use the high level describeDecoder to quickly write tests that exercise a Json.Decode.Decoder. For example,
describeDecoder "int"
Json.Decode.int
Debug.toString
[ ( "", FailsToDecode )
, ( "\"foo\"", FailsToDecode )
, ( "1", DecodesTo 1 )
, ( "1.5", FailsToDecode )
, ( "\"this-will-fail\"", DecodesTo 5)
]
In this example, the last test will fail, giving helpful feedback:
โ int
โ this-will-fail DecodesTo 5
Expected input:
"this-will-fail"
to decode successfully, but instead it failed with message:
Problem with the given value:
"this-will-fail"
Expecting an INT
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