Add unit tests for UniCoversion.

1 files changed, 264 insertions, 0 deletions

diff --git a/test/unit/testUniConversion.cxx b/test/unit/testUniConversion.cxx
new file mode 100644
index 000000000..16ea1d974
--- /dev/null
+++ b/test/unit/testUniConversion.cxx
@@ -0,0 +1,264 @@
+// 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);
+	}
+}
+
+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);
+	}
+
+	// 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);
+	}
+}
+
+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") {
+		const char *s = "a";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == 1);
+	}
+
+	SECTION("UTF8Classify Invalid Too large lead") {
+		const char *s = "\xF5";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1|UTF8MaskInvalid));
+	}
+
+	// 4 byte lead
+
+	SECTION("UTF8Classify 4 byte lead, string less than 4 long") {
+		const char *s = "\xF0";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 1FFFF non-character") {
+		const char *s = "\xF0\x9F\xBF\xBF";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (4 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 1 Greater than max Unicode 110000") {
+		// Maximum Unicode value is 10FFFF so 110000 is out of range
+		const char *s = "\xF4\x90\x80\x80";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 4 byte overlong") {
+		const char *s = "\xF0\x80\x80\x80";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 4 byte valid character") {
+		const char *s = "\xF0\x9F\x8C\x90";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == 4);
+	}
+
+	SECTION("UTF8Classify 4 byte bad trails") {
+		const char *s = "\xF0xyz";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	// 3 byte lead
+
+	SECTION("UTF8Classify 3 byte lead, string less than 3 long") {
+		const char *s = "\xEF";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 3 byte lead, overlong") {
+		const char *s = "\xE0\x80\xAF";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 3 byte lead, surrogate") {
+		const char *s = "\xED\xA0\x80";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify FFFE non-character") {
+		const char *s = "\xEF\xBF\xBE";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (3 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify FFFF non-character") {
+		const char *s = "\xEF\xBF\xBF";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (3 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify FDD0 non-character") {
+		const char *s = "\xEF\xB7\x90";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (3 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 3 byte valid character") {
+		const char *s = "\xE2\x82\xAC";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == 3);
+	}
+
+	SECTION("UTF8Classify 3 byte bad trails") {
+		const char *s = "\xE2qq";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	// 2 byte lead
+
+	SECTION("UTF8Classify 2 byte lead, string less than 2 long") {
+		const char *s = "\xD0";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify 2 byte valid character") {
+		const char *s = "\xD0\x80";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == 2);
+	}
+
+	SECTION("UTF8Classify 2 byte lead trail is invalid") {
+		const char *s = "\xD0q";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify Overlong") {
+		const char *s = "\xC0";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+
+	SECTION("UTF8Classify single trail byte") {
+		const char *s = "\x80";
+		REQUIRE(UTF8Classify(reinterpret_cast<const unsigned char *>(s), strlen(s)) == (1 | UTF8MaskInvalid));
+	}
+}
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