From fcc389466763ce5e83f1b20e2ff46abfd7fffb51 Mon Sep 17 00:00:00 2001
From: Andrea Mazzoleni <amadvance@gmail.com>
Date: Fri, 4 Dec 2015 22:38:43 +0100
Subject: [PATCH] Add regression test for UUID change

---
 Makefile.am        | 3 +++
 cmdline/snapraid.c | 7 +++++++
 cmdline/state.c    | 5 +++++
 cmdline/state.h    | 1 +
 4 files changed, 16 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index 78a968ec..20666a56 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -305,6 +305,9 @@ endif
 	rm bench/disk1/EXTRA1
 	touch bench/disk1/EXTRA2
 	$(TESTENV) ./snapraid$(EXEEXT) $(CHECKFLAGS) -c $(CONF) -E sync
+# Change UUID
+	$(TESTENV) ./snapraid$(EXEEXT) $(CHECKFLAGS) -c $(CONF) --test-fake-uuid sync
+	$(TESTENV) ./snapraid$(EXEEXT) $(CHECKFLAGS) -c $(CONF) sync
 #### NOT EMPTY ####
 	echo --- Create some files
 	$(TESTENV) ./mktest$(EXEEXT) generate 1 6 $(CHECKCOUNT) $(CHECKSIZE)
diff --git a/cmdline/snapraid.c b/cmdline/snapraid.c
index 7c2bcceb..5b911dc8 100644
--- a/cmdline/snapraid.c
+++ b/cmdline/snapraid.c
@@ -246,6 +246,7 @@ void config(char* conf, size_t conf_size, const char* argv0)
 #define OPT_TEST_FAKE_DEVICE 284
 #define OPT_TEST_EXPECT_NEED_SYNC 285
 #define OPT_NO_WARNINGS 286
+#define OPT_TEST_FAKE_UUID 287
 
 #if HAVE_GETOPT_LONG
 struct option long_options[] = {
@@ -364,6 +365,9 @@ struct option long_options[] = {
 	/* Disable annoying warnings */
 	{ "test-no-warnings", 0, 0, OPT_NO_WARNINGS },
 
+	/* Fake UUID */
+	{ "test-fake-uuid", 0, 0, OPT_TEST_FAKE_UUID },
+
 	{ 0, 0, 0, 0 }
 };
 #endif
@@ -733,6 +737,9 @@ int main(int argc, char* argv[])
 		case OPT_NO_WARNINGS :
 			opt.no_warnings = 1;
 			break;
+		case OPT_TEST_FAKE_UUID :
+			opt.fake_uuid = 2;
+			break;
 		default :
 			/* LCOV_EXCL_START */
 			log_fatal("Unknown option '%c'\n", (char)c);
diff --git a/cmdline/state.c b/cmdline/state.c
index cfb6a888..586e75e7 100644
--- a/cmdline/state.c
+++ b/cmdline/state.c
@@ -1271,6 +1271,11 @@ static void state_map(struct snapraid_state* state)
 				continue;
 			}
 
+			if (state->opt.fake_uuid) {
+				snprintf(uuid, sizeof(uuid), "fake-uuid-%d", state->opt.fake_uuid);
+				--state->opt.fake_uuid;
+			}
+
 			/* if the uuid is changed */
 			if (strcmp(uuid, map->uuid) != 0) {
 				/* mark the disk as with an UUID change */
diff --git a/cmdline/state.h b/cmdline/state.h
index b073e0e7..f36227b8 100644
--- a/cmdline/state.h
+++ b/cmdline/state.h
@@ -105,6 +105,7 @@ struct snapraid_option {
 	int fake_device; /**< Fake device data. */
 	int no_warnings; /**< Remove some warning messages. */
 	int expected_missing; /**< If missing files are expected and should not be reported. */
+	int fake_uuid; /**< Set fakes UUID for testing. */
 };
 
 /**