/****************************************************************************
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 Copyright (c) 2019-present Axmol Engine contributors (see AUTHORS.md).

 https://axmolengine.github.io/

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 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 ****************************************************************************/

#include <doctest.h>
#include "ui/UIHelper.h"

USING_NS_AX;
using ax::ui::Helper;


TEST_SUITE("ui/Helper") {
    TEST_CASE("getSubStringOfUTF8String") {
        SUBCASE("normal_cases") {
            std::string source = "abcdefghij";
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 2) == "ab");
            CHECK(Helper::getSubStringOfUTF8String(source, 2, 2) == "cd");
            CHECK(Helper::getSubStringOfUTF8String(source, 4, 2) == "ef");
        }

        SUBCASE("empty_string") {
            std::string source = "";

            // OK
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 1) == "");

            // Error: These cases cause "out of range" error
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 1) == "");
        }

        SUBCASE("ascii") {
            std::string source = "abc";

            // OK
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 2, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 3, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 3) == "abc");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 4) == "abc");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 2) == "bc");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 3) == "bc");
            CHECK(Helper::getSubStringOfUTF8String(source, 2, 1) == "c");
            CHECK(Helper::getSubStringOfUTF8String(source, 2, 2) == "c");
            CHECK(Helper::getSubStringOfUTF8String(source, 3, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 3, 2) == "");

            // Error: These cases cause "out of range" error
            CHECK(Helper::getSubStringOfUTF8String(source, 4, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 4, 1) == "");
        }

        SUBCASE("CJK") {
            std::string source = "这里是中文测试例";

            // OK
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 7, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 8, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 8, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 1) == "\xe8\xbf\x99");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 4) == "\xe8\xbf\x99\xe9\x87\x8c\xe6\x98\xaf\xe4\xb8\xad");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 8) ==
                    "\xe8\xbf\x99\xe9\x87\x8c\xe6\x98\xaf\xe4\xb8\xad\xe6\x96\x87\xe6\xb5\x8b\xe8\xaf\x95\xe4\xbe\x8b");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 100) ==
                    "\xe8\xbf\x99\xe9\x87\x8c\xe6\x98\xaf\xe4\xb8\xad\xe6\x96\x87\xe6\xb5\x8b\xe8\xaf\x95\xe4\xbe\x8b");
            CHECK(Helper::getSubStringOfUTF8String(source, 2, 5) ==
                    "\xe6\x98\xaf\xe4\xb8\xad\xe6\x96\x87\xe6\xb5\x8b\xe8\xaf\x95");
            CHECK(Helper::getSubStringOfUTF8String(source, 6, 2) == "\xe8\xaf\x95\xe4\xbe\x8b");
            CHECK(Helper::getSubStringOfUTF8String(source, 6, 100) == "\xe8\xaf\x95\xe4\xbe\x8b");

            // Error: These cases cause "out of range" error
            CHECK(Helper::getSubStringOfUTF8String(source, 9, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 9, 1) == "");
        }

        SUBCASE("redundant_utf8_sequence_for_directory_traversal_attack") {
            // Redundant UTF-8 sequence for Directory traversal attack (1)
            std::string source = "\xC0\xAF";

            // Error: Can't convert string to correct encoding such as UTF-32
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 2) == "");
        }

        SUBCASE("redundant_utf8_sequence_for_directory_traversal_attack_2") {
            std::string source = "\xE0\x80\xAF";

            // Error: Can't convert string to correct encoding such as UTF-32
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 3) == "");
        }

        SUBCASE("redundant_utf8_sequence_for_directory_traversal_attack_3") {
            std::string source = "\xF0\x80\x80\xAF";

            // Error: Can't convert string to correct encoding such as UTF-32
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 0) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 1, 1) == "");
            CHECK(Helper::getSubStringOfUTF8String(source, 0, 4) == "");
        }
    }
}