29 lines
683 B
Nix
29 lines
683 B
Nix
msg:
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{ actual, expected, asString ? false, asJSON ? false, removeDunders ? false
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, safeToPrint ? true }:
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let
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preProcess = v:
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if removeDunders then
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undunder v
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else if asString then
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toString v
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else if asJSON then
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builtins.toJSON v
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else
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v;
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a = preProcess actual;
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e = preProcess expected;
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undunder = v: if builtins.isAttrs v then builtins.removeAttrs v [ "__toString" "__functor" ] else v;
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out = (if safeToPrint then builtins.toJSON (undunder actual) else ''{"msg": "refusing to print"}'');
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in if (a == e) then ''
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echo 'it ${msg}'
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'' else
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builtins.trace "FAILED ${msg}" ''
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echo FAILED ${msg}
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echo '${out}' | jq '.'
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''
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