core/lib/tests/modules/test-mergeAttrDefinitionsWithPrio.nix

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{ lib, options, ... }:
let
defs = lib.modules.mergeAttrDefinitionsWithPrio options._module.args;
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assertLazy =
pos:
throw "${pos.file}:${toString pos.line}:${toString pos.column}: The test must not evaluate this the assertLazy thunk, but it did. Unexpected strictness leads to unexpected errors and performance problems.";
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in
{
options.result = lib.mkOption { };
config._module.args = {
default = lib.mkDefault (assertLazy __curPos);
regular = null;
force = lib.mkForce (assertLazy __curPos);
unused = assertLazy __curPos;
};
config.result =
assert defs.default.highestPrio == (lib.mkDefault (assertLazy __curPos)).priority;
assert defs.regular.highestPrio == lib.modules.defaultOverridePriority;
assert defs.force.highestPrio == (lib.mkForce (assertLazy __curPos)).priority;
true;
}