42 lines
910 B
Nix
42 lines
910 B
Nix
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msg:
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{ actual, expected ? { }, asString ? false, asJSON ? false
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, removeDunders ? false, safeToPrint ? true, throws ? false }:
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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:
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if builtins.isAttrs v then
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builtins.removeAttrs v [ "__toString" "__functor" ]
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else
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v;
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out = (if safeToPrint then
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builtins.toJSON (undunder (if throws then
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(builtins.tryEval actual).value
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else {
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inherit actual expected;
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}))
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else
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''{"msg": "cannot be stringified ):"}'');
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success =
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if throws then (builtins.tryEval actual).success == false else (a == e);
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in {
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inherit success msg;
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} // (if success then
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{ }
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else
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builtins.trace "FAILED ${msg}" { inherit actual expected; })
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