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-rw-r--r--tvix/glue/src/builtins/mod.rs36
1 files changed, 36 insertions, 0 deletions
diff --git a/tvix/glue/src/builtins/mod.rs b/tvix/glue/src/builtins/mod.rs
index 6ae99ba14759..455fdbd0fc37 100644
--- a/tvix/glue/src/builtins/mod.rs
+++ b/tvix/glue/src/builtins/mod.rs
@@ -143,6 +143,42 @@ mod tests {
         );
     }
 
+    /// Construct two FODs with the same name, and same known output (but
+    /// slightly different recipe), ensure they have the same output hash.
+    #[test]
+    fn test_fod_outpath() {
+        let code = r#"
+          (builtins.derivation { name = "foo"; builder = "/bin/sh"; system = "x86_64-linux"; outputHash = "sha256-Q3QXOoy+iN4VK2CflvRulYvPZXYgF0dO7FoF7CvWFTA="; }).outPath ==
+          (builtins.derivation { name = "foo"; builder = "/bin/aa"; system = "x86_64-linux"; outputHash = "sha256-Q3QXOoy+iN4VK2CflvRulYvPZXYgF0dO7FoF7CvWFTA="; }).outPath
+        "#;
+
+        let value = eval(code).value.expect("must succeed");
+        match value {
+            tvix_eval::Value::Bool(v) => {
+                assert!(v);
+            }
+            _ => panic!("unexpected value type: {:?}", value),
+        }
+    }
+
+    /// Construct two FODs with the same name, and same known output (but
+    /// slightly different recipe), ensure they have the same output hash.
+    #[test]
+    fn test_fod_outpath_different_name() {
+        let code = r#"
+          (builtins.derivation { name = "foo"; builder = "/bin/sh"; system = "x86_64-linux"; outputHash = "sha256-Q3QXOoy+iN4VK2CflvRulYvPZXYgF0dO7FoF7CvWFTA="; }).outPath ==
+          (builtins.derivation { name = "foo"; builder = "/bin/aa"; system = "x86_64-linux"; outputHash = "sha256-Q3QXOoy+iN4VK2CflvRulYvPZXYgF0dO7FoF7CvWFTA="; }).outPath
+        "#;
+
+        let value = eval(code).value.expect("must succeed");
+        match value {
+            tvix_eval::Value::Bool(v) => {
+                assert!(v);
+            }
+            _ => panic!("unexpected value type: {:?}", value),
+        }
+    }
+
     /// Construct two derivations with the same parameters except
     /// one of them lost a context string for a dependency, causing
     /// the loss of an element in the `inputDrvs` derivation.