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nixpkgs/pkgs/test/kernel.nix
Matthieu Coudron b9a4e6953d kernel: fix config generation
Addresses https://github.com/NixOS/nixpkgs/issues/71803:
Kernel options are not merged as described, especially the "optional"
aspects. The error silences legitimate warnings.
2020-04-01 22:25:57 +02:00

80 lines
2.2 KiB
Nix

# 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 }:
with lib;
with kernel;
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 = mkMerge [
{ NIXOS_FAKE_USB_DEBUG = yes;}
{ NIXOS_FAKE_USB_DEBUG = option yes; }
];
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:
];
yesWinsOverNoConfig = mkMerge [
# default for "NIXOS_TEST_BOOLEAN" is no
{ "NIXOS_TEST_BOOLEAN" = yes; } # yes wins over no by default
{ "NIXOS_TEST_BOOLEAN" = no; }
];
optionalNoWins = mkMerge [
{ NIXOS_FAKE_USB_DEBUG = option yes;}
{ NIXOS_FAKE_USB_DEBUG = yes;}
];
allOptionalRemainOptional = mkMerge [
{ NIXOS_FAKE_USB_DEBUG = option yes;}
{ NIXOS_FAKE_USB_DEBUG = option yes;}
];
in
runTests {
testEasy = {
expr = (getConfig { NIXOS_FAKE_USB_DEBUG = 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 yesWinsOverNoConfig)."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;
};
}