helpers/mkSnapshot

Assert the outputs of a result check match expected values.

Compares exitCode, stdout, and/or stderr of the wrapped check against expected strings. Any mismatch is reported to the snapshot’s own stderr output. At least one of exitCode, stdout, or stderr must be provided.

For extra derivation attributes, use mkSnapshotWith directly.

Type

mkSnapshot :: String -> AttrSet -> Derivation -> Derivation

Arguments

name

Check name. Becomes the derivation name snapshot-<name>.

expectations

Attribute set with the following keys:

exitCode (optional)

Expected exit code string, e.g. "0" or "1".

stdout (optional)

Expected stdout content.

stderr (optional)

Expected stderr content.

resultCheck

The result check derivation to test.

Example

mkSnapshot "hello-snapshot" { exitCode = "0"; stdout = "hi\n"; }
<| mkResult "hello" "echo hi"