Merge pull request #269552 from adisbladis/lib-matchattrs-list-allocs

lib.attrsets.matchAttrs: Avoid some list allocations when walking structure

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/tests/misc.nix b/lib/tests/misc.nix
index 8f4a37149d92c..9f1fee2ba2341 100644
--- a/lib/tests/misc.nix
+++ b/lib/tests/misc.nix
@@ -831,6 +831,26 @@ runTests {
     };
   };
 
+  testMatchAttrsMatchingExact = {
+    expr = matchAttrs { cpu = { bits = 64; }; } { cpu = { bits = 64; }; };
+    expected = true;
+  };
+
+  testMatchAttrsMismatch = {
+    expr = matchAttrs { cpu = { bits = 128; }; } { cpu = { bits = 64; }; };
+    expected = false;
+  };
+
+  testMatchAttrsMatchingImplicit = {
+    expr = matchAttrs { cpu = { }; } { cpu = { bits = 64; }; };
+    expected = true;
+  };
+
+  testMatchAttrsMissingAttrs = {
+    expr = matchAttrs { cpu = {}; } { };
+    expected = false;
+  };
+
   testOverrideExistingEmpty = {
     expr = overrideExisting {} { a = 1; };
     expected = {};