task queue tests and extensions (#18)

* task queue tests and extensions

* clean up test

test/common_tests.c

@@ -0,0 +1,27 @@
+#include "greatest.h"
+
+#include "common.h"
+
+SUITE(common_tests);
+
+TEST sha1_test(void) {
+  static char hex[2 * UNIQUE_ID_SIZE + 1];
+  static unsigned char id[UNIQUE_ID_SIZE];
+  unique_id uid = globally_unique_id();
+  sha1_to_hex(&uid.id[0], &hex[0]);
+  hex_to_sha1(&hex[0], &id[0]);
+  ASSERT(memcmp(&uid.id[0], &id[0], 20) == 0);
+  PASS();
+}
+
+SUITE(common_tests) {
+  RUN_TEST(sha1_test);
+}
+
+GREATEST_MAIN_DEFS();
+
+int main(int argc, char **argv) {
+  GREATEST_MAIN_BEGIN();
+  RUN_SUITE(common_tests);
+  GREATEST_MAIN_END();
+}