cue: move custom installCheckPhase to passthru.tests

As recommended by the Nixpkgs documentation, custom tests are better served by
passthru.tests, whilst installCheckPhase is recommended for tests that come from
the upstream.

pkgs/development/tools/cue/default.nix

@@ -27,21 +27,16 @@ buildGoModule rec {
   ldflags = [ "-s" "-w" "-X cuelang.org/go/cmd/cue/cmd.version=${version}" ];
 
   postInstall = ''
-    # Completions
     installShellCompletion --cmd cue \
       --bash <($out/bin/cue completion bash) \
       --fish <($out/bin/cue completion fish) \
       --zsh <($out/bin/cue completion zsh)
   '';
 
-  doInstallCheck = true;
-  installCheckPhase = ''
-    $out/bin/cue eval - <<<'a: "all good"' > /dev/null
-  '';
-
   passthru = {
     writeCueValidator = callPackage ./validator.nix { };
     tests = {
+      test-001-all-good = callPackage ./tests/001-all-good.nix { };
       version = testers.testVersion {
         package = cue;
         command = "cue version";

pkgs/development/tools/cue/tests/001-all-good.nix

@@ -0,0 +1,11 @@
+{ lib
+, cue
+, runCommand
+}:
+
+runCommand "cue-test-001-all-good-${cue.version}" {
+  nativeBuildInputs = [ cue ];
+  meta.timeout = 10;
+} ''
+    cue eval - <<<'a: "all good"' > $out
+  ''