MAC unit tests: Updated CCA prepare test

Author: Jarkko Paso

test/nanostack/unittest/mac/mac_pd_sap/test_mac_pd_sap.c

@@ -829,17 +829,18 @@ bool test_mac_cca_prepare_cb()
 
     memset(&test_packet, 0, sizeof(mac_pre_build_frame_t));
     rf_ptr.active_pd_data_request = &test_packet;
+    test_packet.csma_periods_left = 1;
     test_packet.fcf_dsn.frametype = FC_BEACON_FRAME;
     test_packet.asynch_request = false;
     fhss_callback_response = -1;
     ret = mac_pd_sap_data_cb(&rf_ptr, &phy_message);
-    if (ret != -2) {
+    if (ret != -1) {
         return false;
     }
     fhss_callback_response = -3;
     rf_ptr.macRfRadioTxActive = true;
     ret = mac_pd_sap_data_cb(&rf_ptr, &phy_message);
-    if (ret != -3) {
+    if (ret != -1) {
         return false;
     }