1 files changed, 20 insertions, 3 deletions
diff --git a/tvix/eval/src/tests/nix_tests/notyetpassing/eval-okay-context-introspection.nix b/tvix/eval/src/tests/nix_tests/notyetpassing/eval-okay-context-introspection.nix
index 43178bd2eef9..50a78d946e76 100644
--- a/tvix/eval/src/tests/nix_tests/notyetpassing/eval-okay-context-introspection.nix
+++ b/tvix/eval/src/tests/nix_tests/notyetpassing/eval-okay-context-introspection.nix
@@ -18,7 +18,24 @@ let
     };
   };
 
-  legit-context = builtins.getContext "${path}${drv.outPath}${drv.foo.outPath}${drv.drvPath}";
+  combo-path = "${path}${drv.outPath}${drv.foo.outPath}${drv.drvPath}";
+  legit-context = builtins.getContext combo-path;
 
-  constructed-context = builtins.getContext (builtins.appendContext "" desired-context);
-in legit-context == constructed-context
+  reconstructed-path = builtins.appendContext
+    (builtins.unsafeDiscardStringContext combo-path)
+    desired-context;
+
+  # Eta rule for strings with context.
+  etaRule = str:
+    str == builtins.appendContext
+      (builtins.unsafeDiscardStringContext str)
+      (builtins.getContext str);
+
+in [
+  (legit-context == desired-context)
+  (reconstructed-path == combo-path)
+  (etaRule "foo")
+  (etaRule drv.drvPath)
+  (etaRule drv.foo.outPath)
+  (etaRule (builtins.unsafeDiscardOutputDependency drv.drvPath))
+]