lib/tests: evaluate value from subflake with callLocklessFlake

lib/tests/flakes/subflakeTest/flake.nix

@@ -1,8 +1,8 @@
 {
-  inputs = {
-    subflake.url = "path:subflake";
-  };
-  outputs = { self, subflake }: {
-    x = subflake;
+  outputs = { self, subflake, callLocklessFlake }: rec {
+    x = (callLocklessFlake {
+      path = subflake;
+      inputs = {};
+    }).subflakeOutput;
   };
 }

lib/tests/flakes/subflakeTest/subflake/flake.nix

@@ -1,5 +1,5 @@
 {
   outputs = { self }: {
-    y = 1;
+    subflakeOutput = 1;
   };
 }

lib/tests/misc.nix

@@ -27,9 +27,9 @@ runTests {
   testCallLocklessFlake = {
     expr = callLocklessFlake {
       path = ./flakes/subflakeTest;
-      inputs = { subflake = ./flakes/subflakeTest/subflake; };
+      inputs = { subflake = ./flakes/subflakeTest/subflake; inherit callLocklessFlake; };
     };
-    expected = { x = ./flakes/subflakeTest/subflake; outPath = ./flakes/subflakeTest; };
+    expected = { x = 1; outPath = ./flakes/subflakeTest; };
   };
 
 # TRIVIAL