Split functionality into test code in pure C and helper code in XC

tests/xua_unit_tests/src/test_hid.c

@@ -0,0 +1,12 @@
+// Copyright 2021 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+#include <stddef.h>
+
+#include "xua_unit_tests.h"
+#include "xua_hid_report_descriptor.h"
+
+void test_uninitialised_hidGetReportDescriptor()
+{
+    unsigned char* reportDescPtr = hidGetReportDescriptor();
+    TEST_ASSERT_NULL( reportDescPtr );
+}

tests/xua_unit_tests/src/xua_unit_test_helper.xc

@@ -1,6 +1,13 @@
 // Copyright 2021 XMOS LIMITED.
 // This Software is subject to the terms of the XMOS Public Licence: Version 1.
-#include "xua_unit_tests.h"
+#ifdef __XC__
+
+#include <xs1.h>
+#include <platform.h>
+#include <xclib.h>
+
+#endif // __XC__
+
 
 in port p_mclk_in                   = XS1_PORT_1D;
 
@@ -19,7 +26,3 @@ void AudioHwInit()
 {
     ; // nothing
 }
-
-void test_null(){
-    TEST_ASSERT_MESSAGE(1, "Success!");
-}

tests/xua_unit_tests/src/xua_unit_tests.h

@@ -4,15 +4,6 @@
 #define XUA_UNIT_TESTS_H_
 
 #include "unity.h"
-
-#ifdef __XC__
-
-#include <xs1.h>
-#include <platform.h>
-#include <xclib.h>
-
 #include "xua_conf.h"
 
-#endif // __XC__
-
 #endif /* XUA_UNIT_TESTS_H_ */