Add test example

CMakeLists.txt

@@ -180,3 +180,12 @@ endif()
 if (TN_WITH_SHARED)
   set(THROUGHNET_LIBRARIES_SHARED throughnet_shared CACHE STRING "ThroughNet shared library")
 endif()
+
+
+# ============================================================================
+# Test example
+# ============================================================================
+
+add_executable(example src/test/example.cc)
+target_link_libraries(example throughnet)
+add_test(example example)

src/test/example.cc

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define CHECK_ERR(err, msg) { \
+    if (err != 0) { \
+        fprintf(stderr, "%s error: %d\n", msg, err); \
+        exit(1); \
+    } \
+}
+
+
+/* ===========================================================================
+ * Test connect_peer1() with valid condition
+ */
+void connect_peer1()
+{
+  int err = 0;
+  CHECK_ERR(err, "nothing");
+}
+
+
+/* ===========================================================================
+ * Usage:  example
+ */
+
+int main(int argc, char *argv[])
+{
+  printf("===== Test started.   =====\n");
+
+  connect_peer1();
+
+  printf("===== Test completed. =====\n");
+  return 0;
+}