--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test_asprintf.c	Wed Dec 03 03:04:39 2025 -0500
@@ -0,0 +1,45 @@
+#include "printf.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <float.h>
+
+int test_asprintf(void)
+{
+	int n, n2;
+	char *s1, *s2;
+
+	n = my_asprintf(&s1,
+#include "test.h"
+		);
+	if (n < 0) {
+		fprintf(stderr, "my_asprintf: %s\n", my_strerror(n));
+		return -1;
+	}
+	n2 = asprintf(&s2,
+#include "test.h"
+		);
+	if (n2 < 0) {
+		my_free(s1);
+		perror("asprintf");
+		return -1;
+	}
+
+	if (strcmp(s1, s2) || (n != n2)) {
+		fprintf(stderr, "Got different results!!\n");
+		fprintf(stderr, " fprintf: %d; %s", n, s1);
+		fprintf(stderr, " my_fprintf: %d; %s", n2, s2);
+
+		my_free(s1);
+		free(s2);
+
+		return -1;
+	}
+
+	my_free(s1);
+	free(s2);
+
+	return 0;
+}