lib-charset: Updated test-charset unit test to check for iconv() E2BIG result

diff --git a/src/lib-charset/test-charset.c b/src/lib-charset/test-charset.c
index 6d04af73ed6ed515a6c446efc64ea811839a208e..ba97be51c8581ab25e8956fbd587037aca790508 100644 (file)
--- a/src/lib-charset/test-charset.c
+++ b/src/lib-charset/test-charset.c
@@ -25,7 +25,7 @@ static void test_charset_utf8_common(const char *input_charset)
                { "p\xC3\xA4\xC3", "p\xC3\xA4", CHARSET_RET_INCOMPLETE_INPUT },
                { "p\xC3\xA4\xC3""a", "p\xC3\xA4"UNICODE_REPLACEMENT_CHAR_UTF8"a", CHARSET_RET_INVALID_INPUT }
        };
-       string_t *str = t_str_new(128);
+       string_t *src, *str = t_str_new(256);
        enum charset_result result;
        unsigned int i;
 
@@ -36,6 +36,18 @@ static void test_charset_utf8_common(const char *input_charset)
                test_assert_idx(strcmp(tests[i].output, str_c(str)) == 0, i);
                test_assert_idx(result == tests[i].result, i);
        }
+       /* check that E2BIG handling works. We assume that iconv() is called
+          with 8192 byte buffer (tmpbuf[8192]) */
+       src = str_new(default_pool, 16384);
+       for (i = 0; i < 8190; i++)
+               str_append_c(src, 'a' + i % ('z'-'a'+1));
+       for (i = 0; i < 256; i++) {
+               str_truncate(str, 0);
+               str_append_c(src, 'A' + i % ('Z'-'A'+1));
+               test_assert_idx(charset_to_utf8_str(input_charset, NULL,
+                                                   str_c(src), str, &result) == 0, i);
+       }
+       str_free(&src);
 }
 
 static void test_charset_utf8(void)