add failed test for INTEGER decode OER

skeletons/tests/check-OER-INTEGER.c

@@ -5,11 +5,41 @@
 #include <INTEGER.c>
 #include <INTEGER_oer.c>
 
+#define CHECK_DECODE_OK(a, b, c)    check_decode_ok(__LINE__, a, b, c)
+
 void
-check_decode_ok(intmax_t control, uint8_t *buf, size_t size) {
+check_decode_ok(int lineno, intmax_t control, char *buf, size_t size) {
+
+    INTEGER_t *st = NULL;
+    asn_dec_rval_t ret;
+
+    ret = asn_DEF_INTEGER.oer_decoder(0, &asn_DEF_INTEGER, 0, (void **)&st, buf, size);
+    if(ret.code != RC_OK) {
+        /* Basic OER decode does not work */
+        fprintf(stderr, "%d: Failed oer_decode(ctl=%" PRIdMAX ", size=%zu)\n",
+                lineno, control, size);
+        assert(ret.code == RC_OK);
+    } else {
+        intmax_t outcome;
+        if(asn_INTEGER2imax(st, &outcome) != 0) {
+            /* Result of decode is structurally incorrect */
+            fprintf(stderr, "%d: Failed to convert INTEGER 2 imax\n",
+                    lineno);
+            assert(!"Unreachable");
+        } else if(outcome != control) {
+            /* Decoded value is wrong */
+            fprintf(stderr,
+                    "%d: Decode result %" PRIdMAX " is not expected %" PRIdMAX
+                    "\n",
+                    lineno, outcome, control);
+            assert(outcome == control);
+        }
+    }
+
+    fprintf(stderr, "%d: Decode result %" PRIdMAX "\n", lineno, control);
 }
 
 int
 main() {
-	check_decode_ok(0, "", 1);
+	CHECK_DECODE_OK(0, "", 1);
 }