--- /dev/null
+#include <string.h>
+#include "test.h"
+
+#define N(s, sub) { \
+ char *p = s; \
+ char *q = strstr(p, sub); \
+ if (q) \
+ error("strstr(%s,%s) returned str+%d, wanted 0\n", #s, #sub, q-p); \
+}
+
+#define T(s, sub, n) { \
+ char *p = s; \
+ char *q = strstr(p, sub); \
+ if (q == 0) \
+ error("strstr(%s,%s) returned 0, wanted str+%d\n", #s, #sub, n); \
+ else if (q - p != n) \
+ error("strstr(%s,%s) returned str+%d, wanted str+%d\n", #s, #sub, q-p, n); \
+}
+
+int main(void)
+{
+ N("", "a")
+ N("a", "aa")
+ N("a", "b")
+ N("aa", "ab")
+ N("aa", "aaa")
+ N("abba", "aba")
+ N("abc abc", "abcd")
+ N("0-1-2-3-4-5-6-7-8-9", "-3-4-56-7-8-")
+ N("0-1-2-3-4-5-6-7-8-9", "-3-4-5+6-7-8-")
+ N("_ _ _\xff_ _ _", "_\x7f_")
+ N("_ _ _\x7f_ _ _", "_\xff_")
+
+ T("", "", 0)
+ T("abcd", "", 0)
+ T("abcd", "a", 0)
+ T("abcd", "b", 1)
+ T("abcd", "c", 2)
+ T("abcd", "d", 3)
+ T("abcd", "ab", 0)
+ T("abcd", "bc", 1)
+ T("abcd", "cd", 2)
+ T("ababa", "baba", 1)
+ T("ababab", "babab", 1)
+ T("abababa", "bababa", 1)
+ T("abababab", "bababab", 1)
+ T("ababababa", "babababa", 1)
+ T("nanabanabanana", "aba", 3)
+ T("nanabanabanana", "ban", 4)
+ T("nanabanabanana", "anab", 1)
+ T("nanabanabanana", "banana", 8)
+ T("_ _\xff_ _", "_\xff_", 2)
+
+ return test_status;
+}