yq: Add test

nixos/tests/all-tests.nix

@@ -411,6 +411,7 @@ in
   xterm = handleTest ./xterm.nix {};
   yabar = handleTest ./yabar.nix {};
   yggdrasil = handleTest ./yggdrasil.nix {};
+  yq = handleTest ./yq.nix {};
   zfs = handleTest ./zfs.nix {};
   zigbee2mqtt = handleTest ./zigbee2mqtt.nix {};
   zoneminder = handleTest ./zoneminder.nix {};

nixos/tests/yq.nix

@@ -0,0 +1,12 @@
+import ./make-test-python.nix ({ pkgs, ... }: {
+  name = "yq";
+  meta = with pkgs.stdenv.lib.maintainers; { maintainers = [ nequissimus ]; };
+
+  nodes.yq = { pkgs, ... }: { environment.systemPackages = with pkgs; [ jq yq ]; };
+
+  testScript = ''
+    assert "hello:\n  foo: bar\n" in yq.succeed(
+        'echo \'{"hello":{"foo":"bar"}}\' | yq -y .'
+    )
+  '';
+})

pkgs/development/python-modules/yq/default.nix

@@ -1,4 +1,5 @@
 { lib
+, nixosTests
 , buildPythonPackage
 , fetchPypi
 , pkgs
@@ -46,6 +47,8 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "yq" ];
 
+  passthru.tests = { inherit (nixosTests) yq; };
+
   meta = with lib; {
     description = "Command-line YAML processor - jq wrapper for YAML documents";
     homepage = "https://github.com/kislyuk/yq";