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# SPDX-License-Identifier: LGPL-2.1-only
# SPDX-FileCopyrightText: © 2022 The TVL Contributors
# SPDX-FileCopyrightText: © 2004-2022 The Nix Contributors
#
# Execute language tests found in tvix_tests and nix_tests
# using the C++ Nix implementation. Based on NixOS/nix:tests/lang.sh.
{ depot, pkgs, lib, ... }:
let
testRoot = ../eval/src/tests;
inherit (pkgs.buildPackages) nix nix_latest;
parseTest = dir: baseName:
let
tokens = builtins.match "(eval|parse)-(okay|fail).+\\.nix" baseName;
in
if tokens == null
then null
else {
type = builtins.elemAt tokens 0;
expectedSuccess = (builtins.elemAt tokens 1) == "okay";
fileName = "${dir}/${baseName}";
};
allLangTests =
lib.concatMap
(
dir:
lib.pipe
(builtins.readDir (testRoot + "/${dir}"))
[
builtins.attrNames
(builtins.map (parseTest dir))
(builtins.filter (t: t != null))
]
) [ "nix_tests" "nix_tests/notyetpassing" "tvix_tests" "tvix_tests/notyetpassing" ];
skippedLangTests = {
# TODO(sterni): set up NIX_PATH in sandbox
"eval-okay-search-path.nix" = true;
# Floating point precision differs between tvix and Nix
"eval-okay-fromjson.nix" = true;
# C++ Nix can't TCO
"eval-okay-tail-call-1.nix" = true;
# Ordering change after 2.3
"eval-okay-xml.nix" = [ nix ];
# Missing builtins in Nix 2.3
"eval-okay-ceil.nix" = [ nix ];
"eval-okay-floor-ceil.nix" = [ nix ];
"eval-okay-floor.nix" = [ nix ];
"eval-okay-groupBy.nix" = [ nix ];
"eval-okay-zipAttrsWith.nix" = [ nix ];
# Comparable lists are not in Nix 2.3
"eval-okay-sort.nix" = [ nix ];
"eval-okay-compare-lists.nix" = [ nix ];
"eval-okay-value-pointer-compare.nix" = [ nix ];
"eval-okay-builtins-genericClosure-pointer-equality.nix" = [ nix ];
"eval-okay-list-comparison.nix" = [ nix ];
# getAttrPos gains support for functionArgs-returned sets after 2.3
"eval-okay-getattrpos-functionargs.nix" = [ nix ];
# groupBy appeared (long) after 2.3
"eval-okay-builtins-groupby-thunk.nix" = [ nix ];
# import is no longer considered a curried primop in Nix > 2.3
"eval-okay-import-display.nix" = [ nix ];
# Cycle detection and formatting changed sometime after Nix 2.3
"eval-okay-cycle-display-cpp-nix-2.13.nix" = [ nix ];
# builtins.replaceStrings becomes lazier in Nix 2.16
"eval-okay-replacestrings.nix" = [ nix ];
# builtins.readFileType is added in Nix 2.15
"eval-okay-readFileType.nix" = [ nix ];
# builtins.fromTOML gains support for timestamps in Nix 2.16
"eval-okay-fromTOML-timestamps.nix" = [ nix ];
# identifier formatting changed in Nix 2.17 due to cppnix commit
# b72bc4a972fe568744d98b89d63adcd504cb586c
"eval-okay-identifier-formatting.nix" = [ nix ];
# TODO(sterni): support diffing working directory and home relative paths
# like C++ Nix test suite (using string replacement).
"eval-okay-path-antiquotation.nix" = true;
};
runCppNixLangTests = cpp-nix:
let
testCommand = { fileName, type, expectedSuccess, ... }:
let
testBase = lib.removeSuffix ".nix" fileName;
expFile =
let
possibleFiles =
builtins.filter
(path: builtins.pathExists (testRoot + "/${path}"))
(builtins.map
(ext: "${testBase}.${ext}")
[ "exp" "exp.xml" ]);
in
if possibleFiles == [ ] then null else builtins.head possibleFiles;
outFile = "${testBase}.out";
# Skip if skippedLangTests prescribes it (possibly just for the current nix)
# or if we are missing an exp file for an eval-okay test.
skip =
let
doSkip = skippedLangTests.${builtins.baseNameOf fileName} or false;
in
if type == "eval" && expectedSuccess && (expFile == null) then true
else if builtins.isBool doSkip then doSkip
else builtins.any (drv: cpp-nix == drv) doSkip;
flagsFile = "${testBase}.flags";
instantiateFlags =
lib.escapeShellArgs
(
[ "--${type}" fileName ]
++ lib.optionals (type == "eval") [ "--strict" ]
++ lib.optionals (expFile != null && lib.hasSuffix "xml" expFile)
[
"--no-location"
"--xml"
]
)
+ lib.optionalString (builtins.pathExists (testRoot + "/${flagsFile}"))
" $(cat '${flagsFile}')";
in
if skip
then "echo \"SKIP ${type} ${fileName}\"\n"
else ''
thisTestPassed=true
echo "RUN ${type} ${fileName} ${
lib.optionalString (!expectedSuccess) "(expecting failure)"
}"
if ! expect ${if expectedSuccess then "0" else "1"} \
nix-instantiate ${instantiateFlags} \
${if expectedSuccess then "1" else "2"}> \
${if expFile != null then outFile else "/dev/null"};
then
echo -n "FAIL"
thisTestPassed=false
fi
'' + lib.optionalString (expFile != null) ''
if ! diff --color=always -u '${outFile}' '${expFile}'; then
thisTestPassed=false
fi
'' + ''
if $thisTestPassed; then
echo -n "PASS"
else
echo -n "FAIL"
passed=false
fi
echo " ${type} ${fileName}"
unset thisTestPassed
'';
in
pkgs.stdenv.mkDerivation {
name = "cpp-${cpp-nix.name}-run-lang-tests";
nativeBuildInputs = [ cpp-nix ];
# Obtain tests via the unpackPhase
src = testRoot;
dontConfigure = true;
# Environment expected by the test suite
TEST_VAR = "foo";
buildPhase = ''
# Make nix-instantiate happy in the sandbox
export NIX_STORE_DIR="$(realpath "$(mktemp -d store.XXXXXXXXXX)")"
export NIX_STATE_DIR="$(realpath "$(mktemp -d state.XXXXXXXXXX)")"
# Helper function to check expected exit code
expect() {
local expected res
expected="$1"
shift
set +e
"$@"
res="$?"
set -e
[[ $res -eq $expected ]]
}
# Track test results so far
passed=true
source "$testCommandsPath"
'';
# Actually runs into the argv limit
passAsFile = [ "testCommands" ];
testCommands = lib.concatMapStrings testCommand allLangTests;
installPhase = ''
if $passed; then
touch $out
else
echo "Some test(s) failed!"
exit 1
fi
'';
};
in
depot.nix.readTree.drvTargets {
"nix-2.3" = runCppNixLangTests nix;
"nix-${lib.versions.majorMinor nix_latest.version}" = runCppNixLangTests nix_latest;
}
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