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kernel32/tests: Improve the WideCharToMultiByte() null-termination and truncation tests.

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Check the content of the output buffer in addition to checking the
return value.
Also show that multibyte characters are not truncated when the output
buffer is too small.
This commit is contained in:
Francois Gouget 2023-04-07 15:52:37 +02:00 • committed by Alexandre Julliard
parent f75fc81c38
commit 11934d2c92
1 changed files with 23 additions and 0 deletions
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23
dlls/kernel32/tests/codepage.c
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@ -54,6 +54,7 @@ static void test_destination_buffer(void)
len = WideCharToMultiByte(CP_ACP, 0, foobarW, -1, buffer, needed+1, NULL, NULL);
ok( (len > 0), "returned %d with %lu and '%s' (expected '> 0')\n",
len, GetLastError(), buffer);
ok(!lstrcmpA(buffer, "foobar"), "expected \"foobar\" got \"%s\"\n", buffer);
memset(buffer, 'x', maxsize);
buffer[maxsize] = '\0';
@ -61,6 +62,7 @@ static void test_destination_buffer(void)
len = WideCharToMultiByte(CP_ACP, 0, foobarW, -1, buffer, needed, NULL, NULL);
ok( (len > 0), "returned %d with %lu and '%s' (expected '> 0')\n",
len, GetLastError(), buffer);
ok(!lstrcmpA(buffer, "foobar"), "expected \"foobar\" got \"%s\"\n", buffer);
memset(buffer, 'x', maxsize);
buffer[maxsize] = '\0';
@ -69,6 +71,8 @@ static void test_destination_buffer(void)
ok( !len && (GetLastError() == ERROR_INSUFFICIENT_BUFFER),
"returned %d with %lu and '%s' (expected '0' with "
"ERROR_INSUFFICIENT_BUFFER)\n", len, GetLastError(), buffer);
ok(!strncmp(buffer, "foobar", 6), "expected \"foobar\" got \"%s\"\n", buffer);
ok(buffer[6] == 'x', "expected buf[5]=='x', got \"%s\"\n", buffer);
memset(buffer, 'x', maxsize);
buffer[maxsize] = '\0';
@ -77,6 +81,8 @@ static void test_destination_buffer(void)
ok( !len && (GetLastError() == ERROR_INSUFFICIENT_BUFFER),
"returned %d with %lu and '%s' (expected '0' with "
"ERROR_INSUFFICIENT_BUFFER)\n", len, GetLastError(), buffer);
ok(buffer[0] == 'f', "expected buf[1]=='f', got \"%s\"\n", buffer);
ok(buffer[1] == 'x', "expected buf[1]=='x', got \"%s\"\n", buffer);
SetLastError(0xdeadbeef);
len = WideCharToMultiByte(CP_ACP, 0, foobarW, -1, buffer, 0, NULL, NULL);
@ -428,6 +434,23 @@ static void test_string_conversion(LPBOOL bUsedDefaultChar)
ok(!strcmp(mbs, "\xf3\xe7\x3d\xa3\xbf\xa3\xbf\xa3\xbf"), "mbs is %s\n", mbs);
if(bUsedDefaultChar) ok(*bUsedDefaultChar == TRUE, "bUsedDefaultChar is %d\n", *bUsedDefaultChar);
/* Show that characters are not truncated */
ZeroMemory(mbs, 5);
ret = WideCharToMultiByte(936, 0, dbwcs2, -1, mbs, 1, (const char *)default_char, bUsedDefaultChar);
ok(!ret, "ret is %d\n", ret);
ok(mbs[0] == '\0', "mbs is %s\n", mbs);
if(bUsedDefaultChar) ok(*bUsedDefaultChar == FALSE, "bUsedDefaultChar is %d\n", *bUsedDefaultChar);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "GetLastError() is %lu\n", GetLastError());
/* And destination is not null-terminated even when too short */
FillMemory(mbs, 5, 'x');
mbs[5] = '\0';
ret = WideCharToMultiByte(936, 0, dbwcs2, -1, mbs, 2, (const char *)default_char, bUsedDefaultChar);
ok(!ret, "ret is %d\n", ret);
ok(!strcmp(mbs, "\xf3\xe7""xxx"), "mbs is %s\n", mbs);
if(bUsedDefaultChar) ok(*bUsedDefaultChar == FALSE, "bUsedDefaultChar is %d\n", *bUsedDefaultChar);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "GetLastError() is %lu\n", GetLastError());
/* Length-only tests */
SetLastError(0xdeadbeef);
ret = WideCharToMultiByte(1252, 0, &wc2, 1, NULL, 0, NULL, bUsedDefaultChar);