rf_file: fix check for number of channels and cleanup after test

lib/src/phy/rf/rf_file_imp.c

@@ -172,7 +172,7 @@ int rf_file_open_multi(char* args, void** h, uint32_t nof_channels)
   FILE* rx_files[SRSRAN_MAX_CHANNELS] = {NULL};
   FILE* tx_files[SRSRAN_MAX_CHANNELS] = {NULL};
 
-  if (h && nof_channels < SRSRAN_MAX_CHANNELS) {
+  if (h && nof_channels <= SRSRAN_MAX_CHANNELS) {
     uint32_t base_srate = FILE_BASERATE_DEFAULT_HZ;
 
     // parse args

lib/src/phy/rf/rf_file_test.c

@@ -228,6 +228,11 @@ void create_file(const char* filename)
   fclose(f);
 }
 
+void remove_file(const char* filename)
+{
+  remove(filename);
+}
+
 int main()
 {
   // create files for testing
@@ -306,6 +311,16 @@ int main()
     return -1;
   }
 
+  // clean workspace
+  remove_file("rx_file0");
+  remove_file("rx_file1");
+  remove_file("rx_file2");
+  remove_file("rx_file3");
+  remove_file("tx_file0");
+  remove_file("tx_file1");
+  remove_file("tx_file2");
+  remove_file("tx_file3");
+
   fprintf(stdout, "Test passed!\n");
 
   return SRSRAN_SUCCESS;