tests: fs: fcb: Make fixed endmarker test optional

The commit splits default FCB scenario into one with endmarker
enabled, the original one, and one with disabled.
This allows to test the FCB in cases when CONFIG_FCB_ALLOW_FIXED_ENDMARKER
is set and not set.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>

tests/subsys/fs/fcb/CMakeLists.txt

@@ -5,5 +5,8 @@ find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(fs_fcb)
 
 FILE(GLOB app_sources src/*.c)
+if(NOT CONFIG_FCB_ALLOW_FIXED_ENDMARKER)
+  list(REMOVE_ITEM "src/fcb_test_crc_disabled_after_enabled.c")
+endif()
 target_sources(app PRIVATE ${app_sources})
 target_include_directories(app PRIVATE ${ZEPHYR_BASE}/subsys/fs/fcb)

tests/subsys/fs/fcb/src/fcb_test.h

@@ -24,7 +24,9 @@ extern "C" {
 #define TEST_FCB_FLASH_AREA_ID		FIXED_PARTITION_ID(TEST_FCB_FLASH_AREA)
 
 extern struct fcb test_fcb;
+#if defined(CONFIG_FCB_ALLOW_FIXED_ENDMARKER)
 extern struct fcb test_fcb_crc_disabled;
+#endif
 
 extern struct flash_sector test_fcb_sector[];
 

tests/subsys/fs/fcb/src/main.c

@@ -14,7 +14,9 @@
 #include <zephyr/device.h>
 
 struct fcb test_fcb = {0};
+#if defined(CONFIG_FCB_ALLOW_FIXED_ENDMARKER)
 struct fcb test_fcb_crc_disabled = { .f_flags = FCB_FLAGS_CRC_DISABLED };
+#endif
 
 uint8_t fcb_test_erase_value;
 
@@ -139,7 +141,11 @@ static void fcb_pretest_4_sectors(void *data)
 
 static void fcb_pretest_crc_disabled(void *data)
 {
+#if defined(CONFIG_FCB_ALLOW_FIXED_ENDMARKER)
 	fcb_tc_pretest(2, &test_fcb_crc_disabled);
+#else
+	ztest_test_skip();
+#endif
 }
 
 /*

tests/subsys/fs/fcb/testcase.yaml

@@ -16,6 +16,18 @@ tests:
   filesystem.fcb.native_sim.no_erase:
     extra_args: CONFIG_FLASH_SIMULATOR_EXPLICIT_ERASE=n
     platform_allow: native_sim
+  filesystem.fcb.fixed_endmarker:
+    platform_allow:
+      - nrf52840dk/nrf52840
+      - nrf52dk/nrf52832
+      - nrf51dk/nrf51822
+      - native_sim
+      - native_sim/native/64
+      - mr_canhubk3
+    tags: flash_circural_buffer
+    integration_platforms:
+      - nrf52840dk/nrf52840
+    extra_args: CONFIG_FCB_ALLOW_FIXED_ENDMARKER=y
   filesystem.fcb.native_sim.fcb_0x00:
     extra_args: DTC_OVERLAY_FILE=boards/native_sim_ev_0x00.overlay
     platform_allow: native_sim