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feat: add new assertions test type

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technofab 2026-10-15 19:27:05 +02:00
parent 6c4c1bace6
commit 17d08b9975
Signed by: technofab
SSH key fingerprint: SHA256:bV4h88OqS/AxjbPn66uUdvK9JsgIW4tv3vwJQ8tpMqQ
10 changed files with 603 additions and 16 deletions
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84
lib/module.nix
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@ -73,9 +73,9 @@
in "${fileRelative}:${toString val.line}";
};
type = mkOption {
type = types.enum ["unit" "snapshot" "script" "vm"];
type = types.enum ["unit" "snapshot" "script" "assertions" "vm"];
description = ''
Type of test, has to be one of "unit", "snapshot", "script", or "vm".
Type of test, has to be one of "unit", "snapshot", "script", "assertions", or "vm".
'';
default = "unit";
apply = value:
@ -84,7 +84,9 @@
assert assertMsg (value == "unit" -> !isUnset config.expected)
"test '${config.name}' as type 'unit' requires 'expected' to be set";
assert assertMsg (value == "unit" -> (xor (isUnset config.actual) (isUnset config.actualDrv)))
"test '${config.name}' as type 'unit' requires only 'actual' OR 'actualDrv' to be set"; value;
"test '${config.name}' as type 'unit' requires only 'actual' OR 'actualDrv' to be set";
assert assertMsg (value == "assertions" -> !isUnset config.assertions)
"test '${config.name}' as type 'assertions' requires 'assertions' to be set"; value;
};
name = mkOption {
type = types.str;
@ -172,6 +174,16 @@
'';
};
};
assertions = mkUnsetOption {
type = types.attrsOf (types.oneOf [types.bool types.str types.attrs]);
description = ''
Attribute set of assertions to run for this test.
Each assertion can evaluate to:
- boolean (`true` for pass, `false` for fail)
- string (custom failure message)
- matcher result attrset (e.g. from `ntlib.asserts.*`)
'';
};
finalConfig = mkOption {
internal = true;
@ -180,11 +192,75 @@
};
config = {
finalConfig = builtins.addErrorContext "[nixtest] while processing test ${config.name}" {
inherit (config) name expected actual actualDrv;
inherit (config) name expected actual actualDrv pos description;
type =
if config.type == "vm"
then "script"
else config.type;
assertions =
if config.type == "assertions"
then
assert assertMsg (!isUnset config.assertions)
"test '${config.name}' as type 'assertions' requires 'assertions' to be set";
assert assertMsg (builtins.isAttrs config.assertions)
"test '${config.name}' assertions must be an attribute set";
builtins.mapAttrs (
assertName: assertionExpr: let
evalRes = builtins.tryEval assertionExpr;
in
if !evalRes.success
then {
ok = false;
error = true;
message = "Nix evaluation error (expression threw or aborted)";
}
else let
val = evalRes.value;
in
if builtins.isBool val
then {
ok = val;
message =
if val
then ""
else "Assertion evaluated to false";
}
else if builtins.isString val
then {
ok = false;
message = val;
}
else if builtins.isAttrs val && (val ? ok)
then {
ok = val.ok;
error = val.error or false;
message = val.message or "";
expected =
if val ? expected
then
(
if builtins.isString val.expected
then val.expected
else generators.toPretty {} val.expected
)
else "";
actual =
if val ? actual
then
(
if builtins.isString val.actual
then val.actual
else generators.toPretty {} val.actual
)
else "";
}
else {
ok = false;
message = "Invalid assertion return type: expected boolean, failure message string, or matcher result";
}
)
config.assertions
else unset;
script =
if config.type == "vm"
then