3 files changed, 59 insertions, 0 deletions
diff --git a/tests/local.mk b/tests/local.mk
index b100e7f15..067ece24d 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -44,6 +44,7 @@ nix_tests = \
   recursive.sh \
   describe-stores.sh \
   flakes.sh \
+  text-hashed-output.sh \
   build.sh \
   compute-levels.sh \
   repl.sh \
diff --git a/tests/text-hashed-output.nix b/tests/text-hashed-output.nix
new file mode 100644
index 000000000..23434c0a1
--- /dev/null
+++ b/tests/text-hashed-output.nix
@@ -0,0 +1,29 @@
+with import ./config.nix;
+
+# A simple content-addressed derivation.
+# The derivation can be arbitrarily modified by passing a different `seed`,
+# but the output will always be the same
+rec {
+  root = mkDerivation {
+    name = "text-hashed-root";
+    buildCommand = ''
+      set -x
+      echo "Building a CA derivation"
+      mkdir -p $out
+      echo "Hello World" > $out/hello
+    '';
+    __contentAddressed = true;
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+  };
+  dependent = mkDerivation {
+    name = "text-hashed-root.drv";
+    buildCommand = ''
+      echo "Copying the derivation"
+      cp ${root.drvPath} $out
+    '';
+    __contentAddressed = true;
+    outputHashMode = "text";
+    outputHashAlgo = "sha256";
+  };
+}
diff --git a/tests/text-hashed-output.sh b/tests/text-hashed-output.sh
new file mode 100644
index 000000000..1c4d3a438
--- /dev/null
+++ b/tests/text-hashed-output.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+# Globally enable the ca derivations experimental flag
+sed -i 's/experimental-features = .*/& ca-derivations ca-references/' "$NIX_CONF_DIR/nix.conf"
+
+# In the corresponding nix file, we have two derivations: the first, named root,
+# is a normal recursive derivation, while the second, named dependent, has the
+# new outputHashMode "text". Note that in "dependent", we don't refer to the
+# build output of root, but only to the path of the drv file. For this reason,
+# we only need to:
+#
+# - instantiate the root derivation
+# - build the dependent derivation
+# - check that the path of the output coincides with that of the original derivation
+
+drv=$(nix-instantiate --experimental-features ca-derivations ./text-hashed-output.nix -A root)
+nix show-derivation --derivation "$drv"
+
+drvDep=$(nix-instantiate --experimental-features ca-derivations ./text-hashed-output.nix -A dependent)
+nix show-derivation --derivation "$drvDep"
+
+out1=$(nix-build --experimental-features ca-derivations ./text-hashed-output.nix -A dependent --no-out-link)
+
+nix path-info $drv --derivation --json | jq
+nix path-info $out1 --derivation --json | jq
+
+test $out1 == $drv