test: test behavior of .-prefixed attrPaths

tests/flakes/absolute-attr-paths.sh

@@ -0,0 +1,17 @@
+source ./common.sh
+
+flake1Dir=$TEST_ROOT/flake1
+
+mkdir -p $flake1Dir
+cat > $flake1Dir/flake.nix <<EOF
+{
+    outputs = { self }: {
+        x = 1;
+        packages.$system.x = 2;
+    };
+}
+EOF
+
+[ "$(nix eval --impure --json $flake1Dir#.x)" -eq 1 ]
+[ "$(nix eval --impure --json $flake1Dir#x)" -eq 2 ]
+[ "$(nix eval --impure --json $flake1Dir#.packages.$system.x)" -eq 2 ]

tests/local.mk

@@ -12,6 +12,7 @@ nix_tests = \
   flakes/check.sh \
   flakes/unlocked-override.sh \
   flakes/absolute-paths.sh \
+  flakes/absolute-attr-paths.sh \
   flakes/build-paths.sh \
   flakes/flake-in-submodule.sh \
   gc.sh \