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test: test UTF-16 truncation in snprintf()

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Check that snprintf() returns the correct required buffer length and prints
the correct string for UTF-16 strings.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2022-01-29 18:28:08 +01:00
parent fe14f88050
commit c672dd770e
1 changed files with 31 additions and 0 deletions
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31
test/unicode_ut.c
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@ -97,6 +97,7 @@ UNICODE_TEST(unicode_test_u16_strcpy);
static int unicode_test_string16(struct unit_test_state *uts)
{
char buf[20];
int ret;
/* Test length and precision */
memset(buf, 0xff, sizeof(buf));
@ -130,6 +131,36 @@ static int unicode_test_string16(struct unit_test_state *uts)
sprintf(buf, "%ls", i3);
ut_asserteq_str("i3?", buf);
memset(buf, 0xff, sizeof(buf));
ret = snprintf(buf, 4, "%ls", c1);
ut_asserteq(6, ret);
ut_asserteq_str("U-B", buf);
memset(buf, 0xff, sizeof(buf));
ret = snprintf(buf, 6, "%ls", c2);
ut_asserteq_str("kafb", buf);
ut_asserteq(9, ret);
memset(buf, 0xff, sizeof(buf));
ret = snprintf(buf, 7, "%ls", c2);
ut_asserteq_str("kafb\xC3\xA1", buf);
ut_asserteq(9, ret);
memset(buf, 0xff, sizeof(buf));
ret = snprintf(buf, 8, "%ls", c3);
ut_asserteq_str("\xE6\xBD\x9C\xE6\xB0\xB4", buf);
ut_asserteq(9, ret);
memset(buf, 0xff, sizeof(buf));
ret = snprintf(buf, 11, "%ls", c4);
ut_asserteq_str("\xF0\x90\x92\x8D\xF0\x90\x92\x96", buf);
ut_asserteq(12, ret);
memset(buf, 0xff, sizeof(buf));
ret = snprintf(buf, 4, "%ls", c4);
ut_asserteq_str("", buf);
ut_asserteq(12, ret);
return 0;
}
UNICODE_TEST(unicode_test_string16);