65 lines
2.3 KiB
Elm
65 lines
2.3 KiB
Elm
module Tests exposing (..)
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import Test exposing (..)
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import Fuzz exposing (..)
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import Expect exposing (Expectation)
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import ElmHub exposing (responseDecoder)
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import Json.Decode exposing (decodeString, Value)
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import String
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all : Test
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all =
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describe "GitHub Response Decoder"
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[ test "it results in an Err for invalid JSON" <|
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\() ->
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let
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json =
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"""{ "pizza": [] }"""
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isErrorResult result =
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case result of
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Err _ ->
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True
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Ok _ ->
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False
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in
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json
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|> decodeString responseDecoder
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|> isErrorResult
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|> Expect.true "Expected decoding an invalid response to return an Err."
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, test "it successfully decodes a valid response" <|
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\() ->
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"""{ "items": [
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{ "id": 5, "full_name": "foo", "stargazers_count": 42 },
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{ "id": 3, "full_name": "bar", "stargazers_count": 77 }
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] }"""
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|> decodeString responseDecoder
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|> Expect.equal
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(Ok
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[ { id = 5, name = "foo", stars = 42 }
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, { id = 3, name = "bar", stars = 77 }
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]
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)
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, fuzz (list int) "it decodes one SearchResult for each 'item' in the JSON" <|
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\ids ->
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let
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jsonFromId id =
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"""{"id": """ ++ toString id ++ """, "full_name": "foo", "stargazers_count": 42}"""
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jsonItems =
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String.join ", " (List.map jsonFromId ids)
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json =
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"""{ "items": [""" ++ jsonItems ++ """] }"""
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in
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case decodeString responseDecoder json of
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Ok results ->
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List.length results
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|> Expect.equal (List.length ids)
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Err err ->
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Expect.fail ("JSON decoding failed unexpectedly: " ++ err)
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]
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