Add property write tests.

lib/packet_datatypes.c

@@ -231,8 +231,6 @@ int packet__write_varint(struct mosquitto__packet *packet, int32_t word)
 	uint8_t byte;
 	int count = 0;
 
-	packet->payload = NULL;
-	packet->remaining_count = 0;
 	do{
 		byte = word % 128;
 		word = word / 128;

test/unit/Makefile

@@ -9,6 +9,7 @@ TEST_OBJS = test.o \
 			datatype_read.o \
 			datatype_write.o \
 			property_read.o \
+			property_write.o \
 			stubs.o \
 			util_topic_test.o \
 			utf8.o

test/unit/property_read.c

@@ -338,7 +338,7 @@ static void varint_prop_read_helper(
 	CU_ASSERT_PTR_NULL(properties);
 }
 
-void packet_helper_reason_string_user_property(void)
+static void packet_helper_reason_string_user_property(void)
 {
 	uint8_t payload[24] = {23,
 		PROP_REASON_STRING, 0, 6, 'r', 'e', 'a', 's', 'o', 'n',

test/unit/test.c

@@ -6,6 +6,7 @@
 int init_datatype_read_tests(void);
 int init_datatype_write_tests(void);
 int init_property_read_tests(void);
+int init_property_write_tests(void);
 int init_utf8_tests(void);
 int init_util_topic_tests(void);
 
@@ -22,6 +23,7 @@ int main(int argc, char *argv[])
 			|| init_datatype_read_tests()
 			|| init_datatype_write_tests()
 			|| init_property_read_tests()
+			|| init_property_write_tests()
 			|| init_util_topic_tests()
 			){