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# make sure to use NON EXISTING kernel settings else they may conflict with
# common-config.nix
{ lib, pkgs }:
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;
mandatoryVsOptionalConfig = lib.mkMerge [
{ NIXOS_FAKE_USB_DEBUG = lib.kernel.yes; }
{ NIXOS_FAKE_USB_DEBUG = lib.kernel.option lib.kernel.yes; }
];
freeformConfig = lib.mkMerge [
{ NIXOS_FAKE_MMC_BLOCK_MINORS = lib.kernel.freeform "32"; } # same as default, won't trigger any error
{ NIXOS_FAKE_MMC_BLOCK_MINORS = lib.kernel.freeform "64"; } # will trigger an error but the message is not great:
];
mkDefaultWorksConfig = lib.mkMerge [
{ "NIXOS_TEST_BOOLEAN" = lib.kernel.yes; }
{ "NIXOS_TEST_BOOLEAN" = lib.mkDefault lib.kernel.no; }
];
allOptionalRemainOptional = lib.mkMerge [
{ NIXOS_FAKE_USB_DEBUG = lib.kernel.option lib.kernel.yes; }
{ NIXOS_FAKE_USB_DEBUG = lib.kernel.option lib.kernel.yes; }
];
failures = lib.runTests {
testEasy = {
expr = (getConfig { NIXOS_FAKE_USB_DEBUG = lib.kernel.yes; }).NIXOS_FAKE_USB_DEBUG;
expected = {
tristate = "y";
optional = false;
freeform = null;
};
};
# 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;
};
# 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;
};
};
in
lib.debug.throwTestFailures {
inherit failures;
description = "kernel unit tests";
}
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