Add example for the weak linking

examples/weak_linking/test/test_common.c

@@ -0,0 +1,33 @@
+#include "test_common.h"
+#include <assert.h>
+#include <stdio.h>
+
+char GLOBAL_TEST_bus_read_ret[32];
+
+
+void spoof_runtime_error( const char* info )
+{
+    fprintf(stderr, "Runtime error: %s\n", info );
+    assert(0);
+}
+
+bool spoof_bus_read_write( uint8_t dev, uint8_t registry, uint8_t* buffer, int len, bool assume_echo )
+{
+    memcpy( buffer, GLOBAL_TEST_bus_read_ret, len );
+    fprintf(stderr, "bus spoof %d %d\n", (int)dev, (int)registry );
+    return true;
+}
+
+void init_tests()
+{
+    memset( GLOBAL_TEST_bus_read_ret, 0x00, sizeof(GLOBAL_TEST_bus_read_ret));
+    FFF_RESET_HISTORY();
+    
+    RESET_FAKE(bus_read_write);
+    RESET_FAKE(bus_write);
+    RESET_FAKE(runtime_error);
+    
+    runtime_error_fake.custom_fake = spoof_runtime_error;
+    bus_read_write_fake.custom_fake = spoof_bus_read_write;
+    bus_write_fake.return_val = true;
+}