tests: cover ownership across ipc connections

tests/Makefile

@@ -10,7 +10,7 @@ LIBS = -lthread -lbio $(FT_LIBS) $(IBUS_LIBS)
 PROG = unit_test
 TESTSRC = unit_test.c test_util.c str_test.c hash_test.c trie_test.c \
 	ko_test.c vi_test.c engine_test.c dict_test.c ipc_test.c \
-	popup_test.c font_test.c ibus_test.c
+	popup_test.c font_test.c ibus_test.c server_test.c
 TESTOBJ = $(TESTSRC:.c=.o)
 PARENTSRC = str.c hash.c trie.c dict.c ko.c vi.c ipc.c popup_layout.c \
 	font.c
@@ -29,6 +29,7 @@ $(TESTOBJ): test.h ../dat.h ../fn.h ../ipc.h ../cutest/cutest.h
 engine_test.o: ../strans.c
 ibus_test.o: CFLAGS += $(IBUS_CFLAGS)
 ibus_test.o: ../ibus.c
+server_test.o: ../srv.c
 unit_font.o: CFLAGS += $(FT_CFLAGS)
 
 unit_%.o: ../%.c ../dat.h ../fn.h ../ipc.h