4 files changed, 92 insertions, 0 deletions
diff --git a/tests/fixtures/bazzite-44/usr/bin/bazzite-steam b/tests/fixtures/bazzite-44/usr/bin/bazzite-steam
new file mode 100644
index 0000000..9249ce1
--- /dev/null
+++ b/tests/fixtures/bazzite-44/usr/bin/bazzite-steam
@@ -0,0 +1,10 @@
+#!/usr/bin/bash
+
+# Minimal structural fixture from Bazzite 44.20260820.
+if [[ $IMAGE_NAME =~ "deck" ]]; then
+  if [[ ! -d $HOME/.local/share/Steam ]]; then
+    mkdir -p "$HOME/.local/share"
+  fi
+
+  DECK_OPTION="-steamdeck"
+fi
diff --git a/tests/fixtures/bazzite-44/usr/libexec/bazzite-hardware-setup b/tests/fixtures/bazzite-44/usr/libexec/bazzite-hardware-setup
new file mode 100644
index 0000000..54aa246
--- /dev/null
+++ b/tests/fixtures/bazzite-44/usr/libexec/bazzite-hardware-setup
@@ -0,0 +1,10 @@
+#!/usr/bin/bash
+
+# Minimal structural fixture from Bazzite 44.20260820.
+if [[ "$IMAGE_NAME" != *deck* && "$IMAGE_NAME" != *dx* ]]; then
+  rm -f /etc/sddm.conf.d/steamos.conf
+fi
+
+if [[ $IMAGE_NAME =~ "deck" ]]; then
+  systemctl mask tuned.service
+fi
diff --git a/tests/fixtures/bazzite-44/usr/libexec/bazzite-user-setup b/tests/fixtures/bazzite-44/usr/libexec/bazzite-user-setup
new file mode 100644
index 0000000..90a1ea8
--- /dev/null
+++ b/tests/fixtures/bazzite-44/usr/libexec/bazzite-user-setup
@@ -0,0 +1,14 @@
+#!/usr/bin/bash
+
+# Minimal structural fixture from Bazzite 44.20260820.
+if [[ $IMAGE_NAME =~ "deck" ]]; then
+  touch "$HOME/Desktop/Return.desktop"
+fi
+
+if [[ $IMAGE_NAME =~ "deck" ]]; then
+  touch "$HOME/.config/bazzite/desktop-configured"
+fi
+
+if [[ $IMAGE_NAME =~ "deck" ]]; then
+  systemctl --user enable --now sdgyrodsu.service
+fi
diff --git a/tests/test-patch-bazzite-deck-identity.sh b/tests/test-patch-bazzite-deck-identity.sh
new file mode 100755
index 0000000..fa420ce
--- /dev/null
+++ b/tests/test-patch-bazzite-deck-identity.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+fixture_root="${repo_root}/tests/fixtures/bazzite-44"
+test_root="$(mktemp -d -t aerocore-deck-identity.XXXXXXXXXX)"
+trap 'rm -rf "${test_root}"' EXIT
+
+cp -a "${fixture_root}/." "${test_root}/"
+
+run_patch() {
+  AEROCORE_DECK_COMPAT_ROOT="${test_root}" \
+    bash "${repo_root}/build_files/patch-bazzite-deck-identity.sh"
+}
+
+assert_count() {
+  local expected="$1"
+  local pattern="$2"
+  local file="$3"
+  local actual
+
+  actual="$(grep -Foc "${pattern}" "${file}" || true)"
+  if [[ "${actual}" != "${expected}" ]]; then
+    echo "Expected ${expected} occurrence(s) of '${pattern}' in ${file}, found ${actual}" >&2
+    exit 1
+  fi
+}
+
+hardware_setup="${test_root}/usr/libexec/bazzite-hardware-setup"
+steam="${test_root}/usr/bin/bazzite-steam"
+user_setup="${test_root}/usr/libexec/bazzite-user-setup"
+# shellcheck disable=SC2016
+deck_condition='if [[ $IMAGE_NAME =~ "deck" || $IMAGE_NAME == aerocore-os ]]; then'
+# shellcheck disable=SC2016
+non_deck_condition='if [[ "$IMAGE_NAME" != aerocore-os && "$IMAGE_NAME" != *deck* && "$IMAGE_NAME" != *dx* ]]; then'
+
+run_patch
+
+assert_count 1 "${non_deck_condition}" "${hardware_setup}"
+assert_count 1 "${deck_condition}" "${hardware_setup}"
+assert_count 1 "${deck_condition}" "${steam}"
+assert_count 3 "${deck_condition}" "${user_setup}"
+assert_count 1 'AeroCore Steam state migration' "${steam}"
+
+# A second run must recognize the patched fixture and make no further changes.
+first_digest="$(sha256sum "${hardware_setup}" "${steam}" "${user_setup}")"
+run_patch
+second_digest="$(sha256sum "${hardware_setup}" "${steam}" "${user_setup}")"
+
+if [[ "${first_digest}" != "${second_digest}" ]]; then
+  echo "Deck identity patch is not idempotent" >&2
+  exit 1
+fi
+
+assert_count 1 'AeroCore Steam state migration' "${steam}"
+
+echo "Bazzite 44 Deck identity fixture passed"