NStack/NStackTests/Utf8Test.cs at develop · tui-cs/NStack · GitHub

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// Utf8Tescs: UTF8 tests

// Based on the Go UTF8 tests

// C# ification by Miguel de Icaza

using NUnit.Framework;

using System;

using NStack;

namespace NStackTests

{

[TestFixture]

public class Utf8Test

{

struct RuneMap

{

public uint Rune;

public byte [] Bytes;

public RuneMap (uint rune, params byte [] bytes)

{

Rune = rune;

Bytes = bytes;

}

};

ustring [] testStrings = new ustring [] {

ustring.Empty,

ustring.Make ("abcd"),

ustring.Make (0xE2, 0x98, 0xBA, 0xE2, 0x98, 0xBB, 0xE2, 0x98, 0xB9),

ustring.Make (

0xE6, 0x97, 0xA5, 0x61, 0xE6, 0x9C, 0xAC, 0x62, 0xE8, 0xAA, 0x9E, 0xC3,

0xA7, 0xE6, 0x97, 0xA5, 0xC3, 0xB0, 0xE6, 0x9C, 0xAC, 0xC3, 0x8A, 0xE8,

0xAA, 0x9E, 0xC3, 0xBE, 0xE6, 0x97, 0xA5, 0xC2, 0xA5, 0xE6, 0x9C, 0xAC,

0xC2, 0xBC, 0xE8, 0xAA, 0x9E, 0x69, 0xE6, 0x97, 0xA5, 0xC2, 0xA9),

ustring.Make (

0xE6, 0x97, 0xA5, 0x61, 0xE6, 0x9C, 0xAC, 0x62, 0xE8, 0xAA, 0x9E, 0xC3,

0xA7, 0xE6, 0x97, 0xA5, 0xC3, 0xB0, 0xE6, 0x9C, 0xAC, 0xC3, 0x8A, 0xE8,

0xAA, 0x9E, 0xC3, 0xBE, 0xE6, 0x97, 0xA5, 0xC2, 0xA5, 0xE6, 0x9C, 0xAC,

0xC2, 0xBC, 0xE8, 0xAA, 0x9E, 0x69, 0xE6, 0x97, 0xA5, 0xC2, 0xA9, 0xE6,

0x97, 0xA5, 0x61, 0xE6, 0x9C, 0xAC, 0x62, 0xE8, 0xAA, 0x9E, 0xC3, 0xA7,

0xE6, 0x97, 0xA5, 0xC3, 0xB0, 0xE6, 0x9C, 0xAC, 0xC3, 0x8A, 0xE8, 0xAA,

0x9E, 0xC3, 0xBE, 0xE6, 0x97, 0xA5, 0xC2, 0xA5, 0xE6, 0x9C, 0xAC, 0xC2,

0xBC, 0xE8, 0xAA, 0x9E, 0x69, 0xE6, 0x97, 0xA5, 0xC2, 0xA9, 0xE6, 0x97,

0xA5, 0x61, 0xE6, 0x9C, 0xAC, 0x62, 0xE8, 0xAA, 0x9E, 0xC3, 0xA7, 0xE6,

0x97, 0xA5, 0xC3, 0xB0, 0xE6, 0x9C, 0xAC, 0xC3, 0x8A, 0xE8, 0xAA, 0x9E,

0xC3, 0xBE, 0xE6, 0x97, 0xA5, 0xC2, 0xA5, 0xE6, 0x9C, 0xAC, 0xC2, 0xBC,

0xE8, 0xAA, 0x9E, 0x69, 0xE6, 0x97, 0xA5, 0xC2, 0xA9),

ustring.Make (0x80, 0x80, 0x80, 0x80)

};

RuneMap [] runeMap = new RuneMap [] {

new RuneMap (0x0000, 0x00),

new RuneMap (0x0001, 0x01),

new RuneMap (0x007e, 0x7e),

new RuneMap (0x007f, 0x7f),

new RuneMap (0x0080, 0xc2, 0x80),

new RuneMap (0x0081, 0xc2, 0x81),

new RuneMap (0x00bf, 0xc2, 0xbf),

new RuneMap (0x00c0, 0xc3, 0x80),

new RuneMap (0x00c1, 0xc3, 0x81),

new RuneMap (0x00c8, 0xc3, 0x88),

new RuneMap (0x00d0, 0xc3, 0x90),

new RuneMap (0x00e0, 0xc3, 0xa0),

new RuneMap (0x00f0, 0xc3, 0xb0),

new RuneMap (0x00f8, 0xc3, 0xb8),

new RuneMap (0x00ff, 0xc3, 0xbf),

new RuneMap (0x0100, 0xc4, 0x80),

new RuneMap (0x07ff, 0xdf, 0xbf),

new RuneMap (0x0400, 0xd0, 0x80),

new RuneMap (0x0800, 0xe0, 0xa0, 0x80),

new RuneMap (0x0801, 0xe0, 0xa0, 0x81),

new RuneMap (0x1000, 0xe1, 0x80, 0x80),

new RuneMap (0xd000, 0xed, 0x80, 0x80),

new RuneMap (0xd7ff, 0xed, 0x9f, 0xbf), // last code point before surrogate hal),

new RuneMap (0xe000, 0xee, 0x80, 0x80), // first code point after surrogate hal),

new RuneMap (0xfffe, 0xef, 0xbf, 0xbe),

new RuneMap (0xffff, 0xef, 0xbf, 0xbf),

new RuneMap (0x10000, 0xf0, 0x90, 0x80, 0x80),

new RuneMap (0x10001, 0xf0, 0x90, 0x80, 0x81),

new RuneMap (0x40000, 0xf1, 0x80, 0x80, 0x80),

new RuneMap (0x10fffe, 0xf4, 0x8f, 0xbf, 0xbe),

new RuneMap (0x10ffff, 0xf4, 0x8f, 0xbf, 0xbf),

new RuneMap (0xFFFD, 0xef, 0xbf, 0xbd)

};

RuneMap [] surrogateMap = new RuneMap [] {

new RuneMap (0xd800, 0xed, 0xa0, 0x80),

new RuneMap (0xdfff, 0xed, 0xbf, 0xbf),

};

[Test]

public void TestFullRune ()

{

foreach (var rm in runeMap) {

Assert.IsTrue (Utf8.FullRune (rm.Bytes), "Error with FullRune on ({0})", rm.Bytes);

Assert.IsTrue (Utf8.FullRune (ustring.Make (rm.Bytes)), "Error with FullRune(ustring) on {0}", rm.Bytes);

var brokenSequence = new byte [rm.Bytes.Length - 1];

Array.Copy (rm.Bytes, brokenSequence, rm.Bytes.Length - 1);

Assert.IsFalse (Utf8.FullRune (brokenSequence), "Expected false for a partial sequence");

Assert.IsFalse (Utf8.FullRune (ustring.Make (brokenSequence)), "Expected false for a partial sequence");

}

Assert.IsTrue (Utf8.FullRune (ustring.Make (0xc0)));

}

[Test]

public void TestEncodeRune ()

{

var result = new byte [10];

Utf8.EncodeRune (0x10000, result);

foreach (var rm in runeMap) {

var n = Utf8.EncodeRune (rm.Rune, result);

for (int i = 0; i < rm.Bytes.Length; i++)

Assert.AreEqual (rm.Bytes [i], result [i], "Failure with rune {0} (0x{0:x}) at index {1}", rm.Rune, i);

}

[Test]

public void TestDecodeRune ()

{

foreach (var rm in runeMap) {

var buffer = rm.Bytes;

(var rune, var size) = Utf8.DecodeRune (buffer);

Assert.AreEqual (rune, rm.Rune, "Decoding rune 0x{0:x} got 0x{1:x}", rm.Rune, rune);

Assert.AreEqual (rm.Bytes.Length, size, "Decoding rune size for 0x{0:x} got 0x{1:x}", rm.Bytes.Length, size);

(rune, size) = Utf8.DecodeRune (ustring.Make (rm.Bytes));

Assert.AreEqual (rune, rm.Rune, "Decoding rune from string 0x{0:x} got 0x{1:x}", rm.Rune, rune);

Assert.AreEqual (rm.Bytes.Length, size, "Decoding rune size for 0x{0:x} got 0x{1:x}", rm.Bytes.Length, size);

// Add trailing zero;

var buffer2 = new byte [rm.Bytes.Length + 1];

Array.Copy (buffer, buffer2, rm.Bytes.Length);

(rune, size) = Utf8.DecodeRune (buffer2);

Assert.AreEqual (rune, rm.Rune, "Decoding rune 0x{0:x} got 0x{1:x}", rm.Rune, rune);

Assert.AreEqual (rm.Bytes.Length, size, "Decoding rune size for 0x{0:x} got 0x{1:x}", rm.Bytes.Length, size);

(rune, size) = Utf8.DecodeRune (ustring.Make (buffer2));

Assert.AreEqual (rune, rm.Rune, "Decoding rune from string 0x{0:x} got 0x{1:x}", rm.Rune, rune);

Assert.AreEqual (rm.Bytes.Length, size, "Decoding rune size for 0x{0:x} got 0x{1:x}", rm.Bytes.Length, size);

// Tru removing one byte

var wantsize = 1;

if (wantsize >= rm.Bytes.Length)

wantsize = 0;

var buffer3 = new byte [rm.Bytes.Length - 1];

Array.Copy (buffer, buffer3, buffer3.Length);

(rune, size) = Utf8.DecodeRune (buffer3);

Assert.AreEqual (rune, Utf8.RuneError, "Expected an error for short buffer in 0x{0:0}", rm.Rune);

Assert.AreEqual (wantsize, size, "Expected {0}={1} for 0x{2}", wantsize, size, rm.Rune);

// Make sure bad sequences fail

var buffer4 = (byte []) rm.Bytes.Clone ();

if (buffer4.Length == 1)

buffer4 [0] = 0x80;

else

buffer4 [buffer4.Length - 1] = 0x7f;

(rune, size) = Utf8.DecodeRune (buffer4);

Assert.AreEqual (rune, Utf8.RuneError, "Expected malformed buffer to return an error for rune 0x{0:x}", rm.Rune);

Assert.AreEqual (1, size, "Expected malformed buffer to return size 1");

(rune, size) = Utf8.DecodeRune (ustring.Make (buffer4));

Assert.AreEqual (rune, Utf8.RuneError, "Expected malformed buffer to return an error");

Assert.AreEqual (1, size, "Expected malformed buffer to return size 1");

}

[Test]

public void TestDecodeSurrogateRune ()

{

foreach (var rm in surrogateMap) {

(var rune, var size) = Utf8.DecodeRune (rm.Bytes);

Assert.AreEqual (rune, Utf8.RuneError);

Assert.AreEqual (1, size);

(rune, size) = Utf8.DecodeRune (ustring.Make (rm.Bytes));

Assert.AreEqual (rune, Utf8.RuneError);

Assert.AreEqual (1, size);

}

public byte [] Subset (byte [] source, int start, int end)

{

if (end == -1)

end = source.Length;

var n = end - start;

var result = new byte [n];

Array.Copy (source, start, result, 0, n);

return result;

}

public void TestSequence (ustring s)

{

var index = new(int idx, uint rune) [s.Length];

var si = 0;

var j = 0;

foreach ((var i, var rune) in s.Range ()) {

Assert.AreEqual (i, si, "Sequence mismatch at index {0} = {1}", i, si);

index [j] = (i, rune);

j++;

(var r1, var size1) = Utf8.DecodeRune (Subset (s.ToByteArray (), i, -1));

Assert.AreEqual (rune, r1, "DecodeRune 0x{0:x} = want 0x{1:x} with {2}", r1, rune, s);

(var r2, var size2) = Utf8.DecodeRune (s [i, null]);

Assert.AreEqual (size1, size2);

si += size1;

}

j--;

for (si = s.Length; si > 0;) {

(var r1, var size1) = Utf8.DecodeLastRune (Subset (s.ToByteArray (), 0, si));

(var r2, var size2) = Utf8.DecodeLastRune (ustring.Make (Subset (s.ToByteArray (), 0, si)));

(var r3, var size3) = Utf8.DecodeLastRune (s [0, si]);

Assert.AreEqual (size1, size2);

Assert.AreEqual (size1, size3);

Assert.AreEqual (r1, index [j].rune);

Assert.AreEqual (r2, index [j].rune);

Assert.AreEqual (r3, index [j].rune);

si -= size1;

Assert.AreEqual (si, index [j].idx);

j--;

}

Assert.AreEqual (si, 0, "DecodeLastRune finished at {0} not 0", si);

}

[Test]

public void TestSequencing ()

{

TestSequence (ustring.Make ("abcd"));

foreach (var ts in testStrings) {

foreach (var m in runeMap) {

var variations = new ustring [] {

ts + ustring.Make (m.Bytes),

ustring.Make (m.Bytes) + ts,

ts + ustring.Make (m.Bytes) + ts

};

foreach (var x in variations)

TestSequence (x);

}

ustring [] invalidSequenceTests = new ustring [] {

ustring.Make (0xed, 0xa0, 0x80, 0x80),// surrogate min

ustring.Make (0xed, 0xbf, 0xbf, 0x80),// surrogate max

// xx

ustring.Make (0x91, 0x80, 0x80, 0x80),

// s1

ustring.Make (0xC2, 0x7F, 0x80, 0x80),

ustring.Make (0xC2, 0xC0, 0x80, 0x80),

ustring.Make (0xDF, 0x7F, 0x80, 0x80),

ustring.Make (0xDF, 0xC0, 0x80, 0x80),

// s2

ustring.Make (0xE0, 0x9F, 0xBF, 0x80),

ustring.Make (0xE0, 0xA0, 0x7F, 0x80),

ustring.Make (0xE0, 0xBF, 0xC0, 0x80),

ustring.Make (0xE0, 0xC0, 0x80, 0x80),

// s3

ustring.Make (0xE1, 0x7F, 0xBF, 0x80),

ustring.Make (0xE1, 0x80, 0x7F, 0x80),

ustring.Make (0xE1, 0xBF, 0xC0, 0x80),

ustring.Make (0xE1, 0xC0, 0x80, 0x80),

//s4

ustring.Make (0xED, 0x7F, 0xBF, 0x80),

ustring.Make (0xED, 0x80, 0x7F, 0x80),

ustring.Make (0xED, 0x9F, 0xC0, 0x80),

ustring.Make (0xED, 0xA0, 0x80, 0x80),

// s5

ustring.Make (0xF0, 0x8F, 0xBF, 0xBF),

ustring.Make (0xF0, 0x90, 0x7F, 0xBF),

ustring.Make (0xF0, 0x90, 0x80, 0x7F),

ustring.Make (0xF0, 0xBF, 0xBF, 0xC0),

ustring.Make (0xF0, 0xBF, 0xC0, 0x80),

ustring.Make (0xF0, 0xC0, 0x80, 0x80),

// s6

ustring.Make (0xF1, 0x7F, 0xBF, 0xBF),

ustring.Make (0xF1, 0x80, 0x7F, 0xBF),

ustring.Make (0xF1, 0x80, 0x80, 0x7F),

ustring.Make (0xF1, 0xBF, 0xBF, 0xC0),

ustring.Make (0xF1, 0xBF, 0xC0, 0x80),

ustring.Make (0xF1, 0xC0, 0x80, 0x80),

// s7

ustring.Make (0xF4, 0x7F, 0xBF, 0xBF),

ustring.Make (0xF4, 0x80, 0x7F, 0xBF),

ustring.Make (0xF4, 0x80, 0x80, 0x7F),

ustring.Make (0xF4, 0x8F, 0xBF, 0xC0),

ustring.Make (0xF4, 0x8F, 0xC0, 0x80),

ustring.Make (0xF4, 0x90, 0x80, 0x80),

};

[Test]

public void TestDecodeInvalidSequence ()

{

foreach (var str in invalidSequenceTests) {

(var r1, _) = Utf8.DecodeRune (str.ToByteArray ());

Assert.AreEqual (r1, Utf8.RuneError);

(var r2, _) = Utf8.DecodeRune (ustring.Make (str.ToByteArray ()));

Assert.AreEqual (r1, Utf8.RuneError);

Assert.AreEqual (r1, r2);

}

(ustring testString, int count) [] runeCountTests = new (ustring,int) [] {

(ustring.Make ("abcd"), 4),

(ustring.Make (0xE2, 0x98, 0xBA, 0xE2, 0x98, 0xBB, 0xE2, 0x98, 0xB9), 3),

(ustring.Make ("1,2,3,4"), 7),

(ustring.Make (0xe2, 0x00), 2),

(ustring.Make (0xe2, 0x80), 2),

(ustring.Make (0x61, 0xe2, 0x80), 3),

};

[Test]

public void TestRuneCount ()

{

foreach (var t in runeCountTests) {

Assert.AreEqual (t.count, Utf8.RuneCount (t.testString.ToByteArray ()));

Assert.AreEqual (t.count, t.testString.RuneCount);

}

[Test]

public void TestRuneLen()

{

(uint rune, int size)[] runeLenTests = new(uint, int)[] {

(0, 1),

('e', 1),

('é', 2),

('☺', 3),

(Utf8.RuneError, 3),

(Utf8.MaxRune, 4),

(0xd800, -1),

(0xdfff, -1),

(Utf8.MaxRune+1, -1),

(unchecked ((uint) -1), -1)

};

foreach (var test in runeLenTests)

{

Assert.AreEqual(test.size, Utf8.RuneLen(test.rune), "Testing size for Rune 0x{0:x}", test.rune);

}

[Test]

public void TestValid()

{

(ustring input, bool output)[] validTests = new(ustring, bool)[] {

(ustring.Make (""), true),

(ustring.Make ("a"), true),

(ustring.Make ("abc"), true),

(ustring.Make ("Ж"), true),

(ustring.Make ("ЖЖ"), true),

(ustring.Make ("брэд-ЛГТМ"), true),

(ustring.Make (0xE2, 0x98, 0xBA, 0xE2, 0x98, 0xBB, 0xE2, 0x98, 0xB9), true),

(ustring.Make (0xaa, 0xe2), false),

(ustring.Make (66, 250), false),

(ustring.Make (66, 250, 67), false),

(ustring.Make ("a\uffDb"), true),

(ustring.Make (0xf4, 0x8f, 0xbf, 0xbf), true), // U+10FFFF

(ustring.Make (0xf4, 0x90, 0x80, 0x80), false), // U+10FFFF+1 out of range

(ustring.Make (0xF7, 0xBF, 0xBF, 0xBF), false), // 0x1FFFFF; out of range

(ustring.Make (0xFB, 0xBF, 0xBF, 0xBF, 0xBF), false), // 0x3FFFFFF; out of range

(ustring.Make (0xc0, 0x80), false), // U+0000 encoded in two bytes: incorrect

(ustring.Make (0xed, 0xa0, 0x80), false), // U+D800 high surrogate (sic)

(ustring.Make (0xed, 0xbf, 0xbf), false), // U+DFFF low surrogate (sic)

};

foreach (var test in validTests)

{

Assert.AreEqual(test.output, Utf8.Valid(test.input.ToByteArray ()));

Assert.AreEqual(test.output, Utf8.Valid(test.input));

}

[Test]

public void ValidRuneTests()

{

(uint rune, bool ok)[] validRuneTest = new(uint, bool)[] {

(0, true),

('e', true),

('é', true),

('☺', true),

(Utf8.RuneError, true),

(Utf8.MaxRune, true),

(0xd7ff, true),

(0xd800, false),

(0xdfff, false),

(0xe000, true),

(Utf8.MaxRune+1, false),

(unchecked ((uint) -1),false)

};

foreach (var test in validRuneTest)

{

Assert.AreEqual(test.ok, Utf8.ValidRune(test.rune), "Testing for valid rune 0x{0:x}", test.rune);

}

NStack/NStackTests/Utf8Test.cs at develop · tui-cs/NStack · GitHub

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