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// Unit Tests for Scintilla internal data structures
#include <cstring>
#include <string>
#include <algorithm>
#include "Platform.h"
#include "UniConversion.h"
#include "catch.hpp"
using namespace Scintilla;
// Test UniConversion.
// Use examples from Wikipedia:
// https://en.wikipedia.org/wiki/UTF-8
TEST_CASE("UTF16Length") {
SECTION("UTF16Length ASCII") {
// Latin Small Letter A
const char *s = "a";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 1U);
}
SECTION("UTF16Length Example1") {
// Dollar Sign
const char *s = "\x24";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 1U);
}
SECTION("UTF16Length Example2") {
// Cent Sign
const char *s = "\xC2\xA2";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 1U);
}
SECTION("UTF16Length Example3") {
// Euro Sign
const char *s = "\xE2\x82\xAC";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 1U);
}
SECTION("UTF16Length Example4") {
// Gothic Letter Hwair
const char *s = "\xF0\x90\x8D\x88";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 2U);
}
SECTION("UTF16Length Invalid Trail byte in lead position") {
const char *s = "a\xB5yz";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 4U);
}
SECTION("UTF16Length Invalid Lead byte at end") {
const char *s = "a\xC2";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 2U);
}
SECTION("UTF16Length Invalid Lead byte implies 3 trails but only 2") {
const char *s = "a\xF1yz";
size_t len = UTF16Length(s, strlen(s));
REQUIRE(len == 2U);
}
}
TEST_CASE("UniConversion") {
// UTF16FromUTF8
SECTION("UTF16FromUTF8 ASCII") {
const char s[] = {'a', 0};
wchar_t tbuf[1] = {0};
size_t tlen = UTF16FromUTF8(s, 1, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 'a');
}
SECTION("UTF16FromUTF8 Example1") {
const char s[] = {'\x24', 0};
wchar_t tbuf[1] = {0};
size_t tlen = UTF16FromUTF8(s, 1, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0x24);
}
SECTION("UTF16FromUTF8 Example2") {
const char s[] = {'\xC2', '\xA2', 0};
wchar_t tbuf[1] = {0};
size_t tlen = UTF16FromUTF8(s, 2, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0xA2);
}
SECTION("UTF16FromUTF8 Example3") {
const char s[] = {'\xE2', '\x82', '\xAC', 0};
wchar_t tbuf[1] = {0};
size_t tlen = UTF16FromUTF8(s, 3, tbuf, 1);;
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0x20AC);
}
SECTION("UTF16FromUTF8 Example4") {
const char s[] = {'\xF0', '\x90', '\x8D', '\x88', 0};
wchar_t tbuf[2] = {0, 0};
size_t tlen = UTF16FromUTF8(s, 4, tbuf, 2);
REQUIRE(tlen == 2U);
REQUIRE(tbuf[0] == 0xD800);
REQUIRE(tbuf[1] == 0xDF48);
}
SECTION("UTF16FromUTF8 Invalid Trail byte in lead position") {
const char s[] = "a\xB5yz";
wchar_t tbuf[4] = {};
size_t tlen = UTF16FromUTF8(s, 4, tbuf, 4);
REQUIRE(tlen == 4U);
REQUIRE(tbuf[0] == 'a');
REQUIRE(tbuf[1] == 0xB5);
REQUIRE(tbuf[2] == 'y');
REQUIRE(tbuf[3] == 'z');
}
SECTION("UTF16FromUTF8 Invalid Lead byte at end") {
const char s[] = "a\xC2";
wchar_t tbuf[2] = {};
size_t tlen = UTF16FromUTF8(s, 2, tbuf, 2);
REQUIRE(tlen == 2U);
REQUIRE(tbuf[0] == 'a');
REQUIRE(tbuf[1] == 0xC2);
}
SECTION("UTF16FromUTF8 Invalid Lead byte implies 3 trails but only 2") {
const char *s = "a\xF1yz";
wchar_t tbuf[4] = {};
size_t tlen = UTF16FromUTF8(s, 4, tbuf, 4);
REQUIRE(tlen == 2U);
REQUIRE(tbuf[0] == 'a');
REQUIRE(tbuf[1] == 0xF1);
}
// UTF32FromUTF8
SECTION("UTF32FromUTF8 ASCII") {
const char s[] = {'a', 0};
unsigned int tbuf[1] = {0};
size_t tlen = UTF32FromUTF8(s, 1, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == static_cast<unsigned int>('a'));
}
SECTION("UTF32FromUTF8 Example1") {
const char s[] = {'\x24', 0};
unsigned int tbuf[1] = {0};
size_t tlen = UTF32FromUTF8(s, 1, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0x24);
}
SECTION("UTF32FromUTF8 Example2") {
const char s[] = {'\xC2', '\xA2', 0};
unsigned int tbuf[1] = {0};
size_t tlen = UTF32FromUTF8(s, 2, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0xA2);
}
SECTION("UTF32FromUTF8 Example3") {
const char s[] = {'\xE2', '\x82', '\xAC', 0};
unsigned int tbuf[1] = {0};
size_t tlen = UTF32FromUTF8(s, 3, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0x20AC);
}
SECTION("UTF32FromUTF8 Example4") {
const char s[] = {'\xF0', '\x90', '\x8D', '\x88', 0};
unsigned int tbuf[1] = {0};
size_t tlen = UTF32FromUTF8(s, 4, tbuf, 1);
REQUIRE(tlen == 1U);
REQUIRE(tbuf[0] == 0x10348);
}
SECTION("UTF32FromUTF8 Invalid Trail byte in lead position") {
const char s[] = "a\xB5yz";
unsigned int tbuf[4] = {};
size_t tlen = UTF32FromUTF8(s, 4, tbuf, 4);
REQUIRE(tlen == 4U);
REQUIRE(tbuf[0] == static_cast<unsigned int>('a'));
REQUIRE(tbuf[1] == 0xB5);
REQUIRE(tbuf[2] == static_cast<unsigned int>('y'));
REQUIRE(tbuf[3] == static_cast<unsigned int>('z'));
}
SECTION("UTF32FromUTF8 Invalid Lead byte at end") {
const char s[] = "a\xC2";
unsigned int tbuf[2] = {};
size_t tlen = UTF32FromUTF8(s, 2, tbuf, 2);
REQUIRE(tlen == 2U);
REQUIRE(tbuf[0] == static_cast<unsigned int>('a'));
REQUIRE(tbuf[1] == 0xC2);
}
SECTION("UTF32FromUTF8 Invalid Lead byte implies 3 trails but only 2") {
const char *s = "a\xF1yz";
unsigned int tbuf[4] = {};
size_t tlen = UTF32FromUTF8(s, 4, tbuf, 4);
REQUIRE(tlen == 2U);
REQUIRE(tbuf[0] == static_cast<unsigned int>('a'));
REQUIRE(tbuf[1] == 0xF1);
}
}
namespace {
// Simple adapter to avoid casting
int UTFClass(const char *s) {
return UTF8Classify(reinterpret_cast<const unsigned char *>(s), static_cast<int>(strlen(s)));
}
}
TEST_CASE("UTF8Classify") {
// These tests are supposed to hit every return statement in UTF8Classify once in order
// except the last which is hit twice.
// Single byte
SECTION("UTF8Classify Simple ASCII") {
REQUIRE(UTFClass("a") == 1);
}
SECTION("UTF8Classify Invalid Too large lead") {
REQUIRE(UTFClass("\xF5") == (1|UTF8MaskInvalid));
}
// 4 byte lead
SECTION("UTF8Classify 4 byte lead, string less than 4 long") {
REQUIRE(UTFClass("\xF0") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 1FFFF non-character") {
REQUIRE(UTFClass("\xF0\x9F\xBF\xBF") == (4 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 1 Greater than max Unicode 110000") {
// Maximum Unicode value is 10FFFF so 110000 is out of range
REQUIRE(UTFClass("\xF4\x90\x80\x80") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 4 byte overlong") {
REQUIRE(UTFClass("\xF0\x80\x80\x80") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 4 byte valid character") {
REQUIRE(UTFClass("\xF0\x9F\x8C\x90") == 4);
}
SECTION("UTF8Classify 4 byte bad trails") {
REQUIRE(UTFClass("\xF0xyz") == (1 | UTF8MaskInvalid));
}
// 3 byte lead
SECTION("UTF8Classify 3 byte lead, string less than 3 long") {
REQUIRE(UTFClass("\xEF") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 3 byte lead, overlong") {
REQUIRE(UTFClass("\xE0\x80\xAF") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 3 byte lead, surrogate") {
REQUIRE(UTFClass("\xED\xA0\x80") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify FFFE non-character") {
REQUIRE(UTFClass("\xEF\xBF\xBE") == (3 | UTF8MaskInvalid));
}
SECTION("UTF8Classify FFFF non-character") {
REQUIRE(UTFClass("\xEF\xBF\xBF") == (3 | UTF8MaskInvalid));
}
SECTION("UTF8Classify FDD0 non-character") {
REQUIRE(UTFClass("\xEF\xB7\x90") == (3 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 3 byte valid character") {
REQUIRE(UTFClass("\xE2\x82\xAC") == 3);
}
SECTION("UTF8Classify 3 byte bad trails") {
REQUIRE(UTFClass("\xE2qq") == (1 | UTF8MaskInvalid));
}
// 2 byte lead
SECTION("UTF8Classify 2 byte lead, string less than 2 long") {
REQUIRE(UTFClass("\xD0") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify 2 byte valid character") {
REQUIRE(UTFClass("\xD0\x80") == 2);
}
SECTION("UTF8Classify 2 byte lead trail is invalid") {
REQUIRE(UTFClass("\xD0q") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify Overlong") {
REQUIRE(UTFClass("\xC0") == (1 | UTF8MaskInvalid));
}
SECTION("UTF8Classify single trail byte") {
REQUIRE(UTFClass("\x80") == (1 | UTF8MaskInvalid));
}
}
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