depot/third_party/nixpkgs/nixos/tests/timidity/with-vorbis.nix

40 lines
1.4 KiB
Nix

import ../make-test-python.nix (
{ pkgs, ... }:
{
name = "timidity-with-vorbis";
nodes.machine =
{ pkgs, ... }:
{
environment.systemPackages = with pkgs; [
(timidity.override { enableVorbis = true; })
ffmpeg # # for `ffprobe`
];
};
testScript = ''
import json
start_all()
## TiMidity++ is around and it claims to support Ogg Vorbis.
machine.succeed("command -v timidity")
machine.succeed("timidity --help | grep 'Ogg Vorbis'")
## TiMidity++ manages to process a MIDI input and produces an Ogg Vorbis
## output file. NOTE: the `timidity` CLI succeeds even when the input file
## does not exist; hence our test for the output file's existence.
machine.succeed("cp ${./tam-lin.midi} tam-lin.midi")
machine.succeed("timidity -Ov tam-lin.midi && test -e tam-lin.ogg")
## The output file has the expected characteristics.
metadata_as_text = machine.succeed("ffprobe -show_format -print_format json -i tam-lin.ogg")
metadata = json.loads(metadata_as_text)
assert metadata['format']['format_name'] == 'ogg', \
f"expected 'format_name' to be 'ogg', got '{metadata['format']['format_name']}'"
assert 37 <= float(metadata['format']['duration']) <= 38, \
f"expected 'duration' to be between 37s and 38s, got {metadata['format']['duration']}s"
'';
}
)