From cbe4d1b33981c258a1451abe447ca199dd7b539a Mon Sep 17 00:00:00 2001
From: eldritch horrors <pennae@lix.systems>
Date: Sun, 22 Feb 2026 23:57:48 +0100
Subject: [PATCH] testing: migrate flakes/flakes.sh (part 15)

flake follows handling during locking

Change-Id: Ia3f2b7a8df1d0ec51fd97d14d49788b33dda7754
---
 tests/functional/flakes/flakes.sh    | 41 ----------------------------
 tests/functional2/flakes/test_cli.py | 35 ++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 41 deletions(-)

diff --git a/tests/functional/flakes/flakes.sh b/tests/functional/flakes/flakes.sh
index 2b031874b..4063ea99f 100644
--- a/tests/functional/flakes/flakes.sh
+++ b/tests/functional/flakes/flakes.sh
@@ -215,47 +215,6 @@ git -C $flake3Dir add flake.nix flake.lock
 git -C $flake3Dir commit -m 'Remove packages.xyzzy'
 git -C $flake3Dir checkout master
 
-# Test 'follows' inputs.
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.foo = {
-    type = "indirect";
-    id = "flake1";
-  };
-  inputs.bar.follows = "foo";
-
-  outputs = { self, foo, bar }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq -c .nodes.root.inputs.bar $flake3Dir/flake.lock) = '["foo"]' ]]
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.bar.follows = "flake2/flake1";
-
-  outputs = { self, flake2, bar }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq -c .nodes.root.inputs.bar $flake3Dir/flake.lock) = '["flake2","flake1"]' ]]
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.bar.follows = "flake2";
-
-  outputs = { self, flake2, bar }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq -c .nodes.root.inputs.bar $flake3Dir/flake.lock) = '["flake2"]' ]]
-
 # Test overriding inputs of inputs.
 writeTrivialFlake $flake7Dir
 git -C $flake7Dir add flake.nix
diff --git a/tests/functional2/flakes/test_cli.py b/tests/functional2/flakes/test_cli.py
index 7aef08894..f7d2ecce7 100644
--- a/tests/functional2/flakes/test_cli.py
+++ b/tests/functional2/flakes/test_cli.py
@@ -577,6 +577,41 @@ class TestLock:
         assert lock["nodes"]["flake1"]["locked"]["rev"] == flake1_modified_commit
         assert lock["nodes"]["flake1_2"]["locked"]["rev"] == flake1_modified_commit
 
+    class TestFollows:
+        def test_simple_explicit(self, nix: Nix, flake3: Path):
+            (flake3 / "flake.nix").write_text("""{
+                inputs.foo = {
+                  type = "indirect";
+                  id = "flake1";
+                };
+                inputs.bar.follows = "foo";
+
+                outputs = { self, foo, bar }: {};
+            }""")
+            nix.nix(["flake", "lock", flake3]).run().ok()
+            lock = json.loads((flake3 / "flake.lock").read_text())
+            assert lock["nodes"]["root"]["inputs"]["bar"] == ["foo"]
+
+        def test_nested_implicit(self, nix: Nix, flake3: Path):
+            (flake3 / "flake.nix").write_text("""{
+                inputs.bar.follows = "flake2/flake1";
+
+                outputs = { self, flake2, bar }: {};
+            }""")
+            nix.nix(["flake", "lock", flake3]).run().ok()
+            lock = json.loads((flake3 / "flake.lock").read_text())
+            assert lock["nodes"]["root"]["inputs"]["bar"] == ["flake2", "flake1"]
+
+        def test_simple_implicit(self, nix: Nix, flake3: Path):
+            (flake3 / "flake.nix").write_text("""{
+                inputs.bar.follows = "flake2";
+
+                outputs = { self, flake2, bar }: {};
+            }""")
+            nix.nix(["flake", "lock", flake3]).run().ok()
+            lock = json.loads((flake3 / "flake.lock").read_text())
+            assert lock["nodes"]["root"]["inputs"]["bar"] == ["flake2"]
+
 
 @pytest.mark.usefixtures("registry")
 class TestMetadata: