espup: simplify version tester

pkgs/development/tools/espup/default.nix

@@ -9,7 +9,7 @@
 , zstd
 , stdenv
 , darwin
-, runCommand
+, testers
 , espup
 }:
 
@@ -62,15 +62,8 @@ rustPlatform.buildRustPackage rec {
       --zsh <($out/bin/espup completions zsh)
   '';
 
-  passthru.tests = {
-    simple = runCommand "${pname}-test" { } ''
-      if [[ `${espup}/bin/espup --version` != *"${version}"*  ]]; then
-        echo "Error: program version does not match package version"
-        exit 1
-      fi
-
-      touch $out
-    '';
+  passthru.tests.version = testers.testVersion {
+    package = espup;
   };
 
   meta = with lib; {