From ebfada36a1d07159141bcb0fb60e7a4f934d448b Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Mon, 27 May 2024 09:58:49 +0200
Subject: [PATCH] Add repl completion test

---
 flake.nix                 |  1 +
 tests/repl-completion.nix | 40 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 tests/repl-completion.nix

diff --git a/flake.nix b/flake.nix
index 987f25305..6356eedc0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -393,6 +393,7 @@
           in pkgs.buildPackages.runCommand "test-rl-next-release-notes" { } ''
           LANG=C.UTF-8 ${pkgs.changelog-d-nix}/bin/changelog-d ${./doc/manual/rl-next} >$out
         '';
+        repl-completion = nixpkgsFor.${system}.native.callPackage ./tests/repl-completion.nix { };
       } // (lib.optionalAttrs (builtins.elem system linux64BitSystems)) {
         dockerImage = self.hydraJobs.dockerImage.${system};
       } // (lib.optionalAttrs (!(builtins.elem system linux32BitSystems))) {
diff --git a/tests/repl-completion.nix b/tests/repl-completion.nix
new file mode 100644
index 000000000..3ba198a98
--- /dev/null
+++ b/tests/repl-completion.nix
@@ -0,0 +1,40 @@
+{ runCommand, nix, expect }:
+
+# We only use expect when necessary, e.g. for testing tab completion in nix repl.
+# See also tests/functional/repl.sh
+
+runCommand "repl-completion" {
+  nativeBuildInputs = [
+    expect
+    nix
+  ];
+  expectScript = ''
+    # Regression https://github.com/NixOS/nix/pull/10778
+    spawn nix repl --offline --extra-experimental-features nix-command
+    expect "nix-repl>"
+    send "foo = import ./does-not-exist.nix\n"
+    expect "nix-repl>"
+    send "foo.\t"
+    expect {
+      "nix-repl>" {
+        puts "Got another prompt. Good."
+      }
+      eof {
+        puts "Got EOF. Bad."
+        exit 1
+      }
+    }
+    exit 0
+  '';
+  passAsFile = [ "expectScript" ];
+}
+''
+  export NIX_STORE=$TMPDIR/store
+  export NIX_STATE_DIR=$TMPDIR/state
+  export HOME=$TMPDIR/home
+  mkdir $HOME
+
+  nix-store --init
+  expect $expectScriptPath
+  touch $out
+''
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