nixpkgs/pkgs/test/kernel.nix

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# to run these tests:
# nix-instantiate --eval --strict . -A tests.kernel-config
#
# make sure to use NON EXISTING kernel settings else they may conflict with
# common-config.nix
{ lib, pkgs }:
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with lib;
with kernel;
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let
lts_kernel = pkgs.linuxPackages.kernel;
# to see the result once the module transformed the lose structured config
getConfig = structuredConfig:
(lts_kernel.override {
structuredExtraConfig = structuredConfig;
}).configfile.structuredConfig;
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mandatoryVsOptionalConfig = mkMerge [
{ NIXOS_FAKE_USB_DEBUG = yes;}
{ NIXOS_FAKE_USB_DEBUG = option yes; }
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];
freeformConfig = mkMerge [
{ NIXOS_FAKE_MMC_BLOCK_MINORS = freeform "32"; } # same as default, won't trigger any error
{ NIXOS_FAKE_MMC_BLOCK_MINORS = freeform "64"; } # will trigger an error but the message is not great:
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];
mkDefaultWorksConfig = mkMerge [
{ "NIXOS_TEST_BOOLEAN" = yes; }
{ "NIXOS_TEST_BOOLEAN" = lib.mkDefault no; }
];
allOptionalRemainOptional = mkMerge [
{ NIXOS_FAKE_USB_DEBUG = option yes;}
{ NIXOS_FAKE_USB_DEBUG = option yes;}
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];
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in
runTests {
testEasy = {
expr = (getConfig { NIXOS_FAKE_USB_DEBUG = yes;}).NIXOS_FAKE_USB_DEBUG;
expected = { tristate = "y"; optional = false; freeform = null; };
};
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# mandatory flag should win over optional
testMandatoryCheck = {
expr = (getConfig mandatoryVsOptionalConfig).NIXOS_FAKE_USB_DEBUG.optional;
expected = false;
};
testYesWinsOverNo = {
expr = (getConfig mkDefaultWorksConfig)."NIXOS_TEST_BOOLEAN".tristate;
expected = "y";
};
testAllOptionalRemainOptional = {
expr = (getConfig allOptionalRemainOptional)."NIXOS_FAKE_USB_DEBUG".optional;
expected = true;
};
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# check that freeform options are unique
# Should trigger
# > The option `settings.NIXOS_FAKE_MMC_BLOCK_MINORS.freeform' has conflicting definitions, in `<unknown-file>' and `<unknown-file>'
testTreeform = let
res = builtins.tryEval ( (getConfig freeformConfig).NIXOS_FAKE_MMC_BLOCK_MINORS.freeform);
in {
expr = res.success;
expected = false;
};
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}