Normalize sds test mechanism together with some compile warnings. (#7854)

src/Makefile

@@ -362,10 +362,6 @@ lcov:
 	@geninfo -o redis.info .
 	@genhtml --legend -o lcov-html redis.info
 
-test-sds: sds.c sds.h
-	$(REDIS_CC) sds.c zmalloc.c -DSDS_TEST_MAIN $(FINAL_LIBS) -o /tmp/sds_test
-	/tmp/sds_test
-
 .PHONY: lcov
 
 bench: $(REDIS_BENCHMARK_NAME)

src/sds.c

@@ -1121,13 +1121,16 @@ void *sds_malloc(size_t size) { return s_malloc(size); }
 void *sds_realloc(void *ptr, size_t size) { return s_realloc(ptr,size); }
 void sds_free(void *ptr) { s_free(ptr); }
 
-#if defined(SDS_TEST_MAIN)
+#ifdef REDIS_TEST
 #include <stdio.h>
 #include "testhelp.h"
 #include "limits.h"
 
 #define UNUSED(x) (void)(x)
-int sdsTest(void) {
+int sdsTest(int argc, char **argv) {
+    UNUSED(argc);
+    UNUSED(argv);
+
     {
         sds x = sdsnew("foo"), y;
 
@@ -1254,7 +1257,8 @@ int sdsTest(void) {
         {
             unsigned int oldfree;
             char *p;
-            int step = 10, j, i;
+            int i;
+            size_t step = 10, j;
 
             sdsfree(x);
             sdsfree(y);
@@ -1264,7 +1268,7 @@ int sdsTest(void) {
             /* Run the test a few times in order to hit the first two
              * SDS header types. */
             for (i = 0; i < 10; i++) {
-                int oldlen = sdslen(x);
+                size_t oldlen = sdslen(x);
                 x = sdsMakeRoomFor(x,step);
                 int type = x[-1]&SDS_TYPE_MASK;
 
@@ -1272,6 +1276,7 @@ int sdsTest(void) {
                 if (type != SDS_TYPE_5) {
                     test_cond("sdsMakeRoomFor() free", sdsavail(x) >= step);
                     oldfree = sdsavail(x);
+                    UNUSED(oldfree);
                 }
                 p = x+oldlen;
                 for (j = 0; j < step; j++) {
@@ -1290,9 +1295,3 @@ int sdsTest(void) {
     return 0;
 }
 #endif
-
-#ifdef SDS_TEST_MAIN
-int main(void) {
-    return sdsTest();
-}
-#endif

src/server.c

@@ -5247,6 +5247,8 @@ int main(int argc, char **argv) {
             return crc64Test(argc, argv);
         } else if (!strcasecmp(argv[2], "zmalloc")) {
             return zmalloc_test(argc, argv);
+        } else if (!strcasecmp(argv[2], "sds")) {
+            return sdsTest(argc, argv);
         }
 
         return -1; /* test not found */