1 files changed, 85 insertions, 0 deletions
diff --git a/tests/trau_sync/trau_sync_test.c b/tests/trau_sync/trau_sync_test.c
new file mode 100644
index 0000000..392a236
--- /dev/null
+++ b/tests/trau_sync/trau_sync_test.c
@@ -0,0 +1,85 @@
+
+#include <osmocom/core/application.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/bits.h>
+
+#include <osmocom/trau/trau_sync.h>
+
+static void frame_out_cb(void *user_data, const ubit_t *bits, unsigned int num_bits)
+{
+	char *str = user_data;
+	printf("demux_bits_cb '%s': %s\n", str, osmo_ubit_dump(bits, num_bits));
+}
+
+static const uint8_t sync_pattern[] = {
+	0x00, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00,
+	0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00,
+	0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00,
+	0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00,
+	0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00,
+};
+
+#define ASSERT_STATE(fi, x) OSMO_ASSERT(!strcmp(osmo_fsm_inst_state_name(fi), x))
+
+static void test_body(void)
+{
+	struct osmo_fsm_inst *fi = osmo_trau_sync_alloc(NULL, "test", frame_out_cb, OSMO_TRAU_SYNCP_16_FR_EFR, "test");
+	OSMO_ASSERT(fi);
+
+	printf("\n==> %s\n", __func__);
+
+	ubit_t bits[40*8];
+
+	/* send some invalid data */
+	memset(bits, 0, sizeof(bits));
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	osmo_trau_sync_rx_ubits(fi, bits, 23);
+
+	/* first valid frame */
+	osmo_pbit2ubit(bits, sync_pattern, sizeof(sync_pattern)*8);
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	ASSERT_STATE(fi, "FRAME_ALIGNED");
+
+	/* second valid frame */
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	ASSERT_STATE(fi, "FRAME_ALIGNED");
+
+	/* send wrong frame */
+	memset(bits, 1, sizeof(bits));
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	ASSERT_STATE(fi, "FRAME_ALIGNED");
+
+	/* intersperse a valid frame */
+	osmo_pbit2ubit(bits, sync_pattern, sizeof(sync_pattern)*8);
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+
+	/* second wrong frame - but not consecutive */
+	memset(bits, 1, sizeof(bits));
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	ASSERT_STATE(fi, "FRAME_ALIGNED");
+
+	/* third wrong frame - second consecutive */
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	ASSERT_STATE(fi, "FRAME_ALIGNED");
+
+	/* only from third consecutive invalid frame onwards we should loose alignment */
+	osmo_trau_sync_rx_ubits(fi, bits, sizeof(bits));
+	ASSERT_STATE(fi, "FRAME_ALIGNMENT_LOST");
+}
+
+
+static const struct log_info_cat default_categories[] = {
+};
+
+const struct log_info log_info = {
+	.cat = default_categories,
+	.num_cat = ARRAY_SIZE(default_categories),
+};
+
+int main(int argc, char **argv)
+{
+	osmo_init_logging2(NULL, NULL);
+	osmo_fsm_log_addr(false);
+	log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE);
+	test_body();
+}