utils_test: add osmo_print_n_test()
A couple of times recently I've needed to copy out a substring to a buffer with
limited size. Use of strncpy() or osmo_strlcpy() are nontrivial here.
I wanted to have a dedicated function.
After I wrote that function with a test, I noticed that I had already
implemented the same thing a while ago, as osmo_print_n() :P
So here is just the test.
Change-Id: Ia716abdc1f58af6065b84f4f567388a32a7b39fc
diff --git a/tests/utils/utils_test.c b/tests/utils/utils_test.c
index 55c9e7f..69510af 100644
--- a/tests/utils/utils_test.c
+++ b/tests/utils/utils_test.c
@@ -1138,6 +1138,59 @@
talloc_free(ctx);
}
+static void osmo_print_n_test(void)
+{
+ struct token_test {
+ const char *src;
+ size_t token_len;
+ size_t buf_size;
+ const char *expect_token;
+ int expect_rc;
+ };
+ struct token_test tests[] = {
+ { "foo=bar", 3, 100, "foo", 3 },
+ { "foo", 10, 100, "foo", 3 },
+ { "foo", 3, 100, "foo", 3 },
+ { NULL, 10, 100, "", 0 },
+ { "", 10, 100, "", 0 },
+ { "foo=bar", 0, 100, "", 0 },
+
+ { "foo=bar", 3, 2, "f", 3 },
+ { "foo", 10, 2, "f", 3 },
+ { "foo", 3, 2, "f", 3 },
+ { NULL, 10, 2, "", 0 },
+ { "", 10, 2, "", 0 },
+ { "foo=bar", 0, 2, "", 0 },
+
+ { "foo=bar", 3, 1, "", 3 },
+ { "foo", 10, 1, "", 3 },
+ { "foo", 3, 1, "", 3 },
+ { NULL, 10, 1, "", 0 },
+ { "", 10, 1, "", 0 },
+ { "foo=bar", 0, 1, "", 0 },
+
+ { "foo=bar", 3, 0, "unchanged", 3 },
+ { "foo", 10, 0, "unchanged", 3 },
+ { "foo", 3, 0, "unchanged", 3 },
+ { NULL, 10, 0, "unchanged", 0 },
+ { "", 10, 0, "unchanged", 0 },
+ { "foo=bar", 0, 0, "unchanged", 0 },
+ };
+ struct token_test *t;
+ printf("\n%s()\n", __func__);
+ for (t = tests; t - tests < ARRAY_SIZE(tests); t++) {
+ char buf[100] = "unchanged";
+ int rc = osmo_print_n(buf, t->buf_size, t->src, t->token_len);
+ printf("%s token_len=%zu buf_size=%zu", osmo_quote_str(t->src, -1), t->token_len, t->buf_size);
+ printf(" -> token=%s rc=%d", osmo_quote_str(buf, -1), rc);
+ if (strcmp(buf, t->expect_token))
+ printf(" ERROR: expected token %s", osmo_quote_str(t->expect_token, -1));
+ if (rc != t->expect_rc)
+ printf(" ERROR: expected rc %d", t->expect_rc);
+ printf("\n");
+ }
+}
+
int main(int argc, char **argv)
{
static const struct log_info log_info = {};
@@ -1159,5 +1212,6 @@
strbuf_test_nolen();
startswith_test();
name_c_impl_test();
+ osmo_print_n_test();
return 0;
}