Add a test for the repair command

This should ensure that https://github.com/flatpak/flatpak/issues/4618
stays fixed.

(cherry picked from commit 45c7f5071c)

tests/Makefile-test-matrix.am.inc

@@ -43,6 +43,7 @@ TEST_MATRIX_DIST= \
 	tests/test-unused.sh \
 	tests/test-prune.sh \
 	tests/test-seccomp.sh \
+	tests/test-repair.sh \
 	$(NULL)
 TEST_MATRIX_EXTRA_DIST= \
 	tests/test-run.sh \

tests/Makefile.am.inc

@@ -281,6 +281,7 @@ TEST_MATRIX_SOURCE = \
 	tests/test-subset.sh{user+system} \
 	tests/test-prune.sh \
 	tests/test-seccomp.sh \
+	tests/test-repair.sh \
 	$(NULL)
 
 update-test-matrix:

tests/test-repair.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+#
+# Copyright (C) 2021 Matthew Leeds <mwleeds@protonmail.com>
+#
+# SPDX-License-Identifier: LGPL-2.0-or-later
+
+set -euo pipefail
+
+. $(dirname $0)/libtest.sh
+
+echo "1..1"
+
+setup_repo
+${FLATPAK} ${U} install -y test-repo org.test.Hello
+
+# delete the object for files/bin/hello.sh
+rm ${FL_DIR}/repo/objects/0d/30582c0ac8a2f89f23c0f62e548ba7853f5285d21848dd503460a567b5d253.file
+
+# dry run repair shouldn't replace the missing file
+${FLATPAK} ${U} repair --dry-run
+assert_not_has_file ${FL_DIR}/repo/objects/0d/30582c0ac8a2f89f23c0f62e548ba7853f5285d21848dd503460a567b5d253.file
+
+# normal repair should replace the missing file
+${FLATPAK} ${U} repair
+assert_has_file ${FL_DIR}/repo/objects/0d/30582c0ac8a2f89f23c0f62e548ba7853f5285d21848dd503460a567b5d253.file
+
+# app should've been reinstalled
+${FLATPAK} ${U} list -d > list-log
+assert_file_has_content list-log "org\.test\.Hello/"
+
+# clean up
+${FLATPAK} ${U} uninstall -y org.test.Platform org.test.Hello
+${FLATPAK} ${U} remote-delete test-repo
+
+ok "repair command handles missing files"