/* */ 
var B = require('../index').Buffer;
var test = require('tape');
test('detect utf16 surrogate pairs', function(t) {
  var text = '\uD83D\uDE38' + '\uD83D\uDCAD' + '\uD83D\uDC4D';
  var buf = new B(text);
  t.equal(text, buf.toString());
  t.end();
});
test('detect utf16 surrogate pairs over U+20000 until U+10FFFF', function(t) {
  var text = '\uD842\uDFB7' + '\uD93D\uDCAD' + '\uDBFF\uDFFF';
  var buf = new B(text);
  t.equal(text, buf.toString());
  t.end();
});
test('replace orphaned utf16 surrogate lead code point', function(t) {
  var text = '\uD83D\uDE38' + '\uD83D' + '\uD83D\uDC4D';
  var buf = new B(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8, 0xef, 0xbf, 0xbd, 0xf0, 0x9f, 0x91, 0x8d]));
  t.end();
});
test('replace orphaned utf16 surrogate trail code point', function(t) {
  var text = '\uD83D\uDE38' + '\uDCAD' + '\uD83D\uDC4D';
  var buf = new B(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8, 0xef, 0xbf, 0xbd, 0xf0, 0x9f, 0x91, 0x8d]));
  t.end();
});
test('do not write partial utf16 code units', function(t) {
  var f = new B([0, 0, 0, 0, 0]);
  t.equal(f.length, 5);
  var size = f.write('あいうえお', 'utf16le');
  t.equal(size, 4);
  t.deepEqual(f, new B([0x42, 0x30, 0x44, 0x30, 0x00]));
  t.end();
});
test('handle partial utf16 code points when encoding to utf8 the way node does', function(t) {
  var text = '\uD83D\uDE38' + '\uD83D\uDC4D';
  var buf = new B(8);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8, 0xf0, 0x9f, 0x91, 0x8d]));
  buf = new B(7);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8, 0x00, 0x00, 0x00]));
  buf = new B(6);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8, 0x00, 0x00]));
  buf = new B(5);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8, 0x00]));
  buf = new B(4);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0xf0, 0x9f, 0x98, 0xb8]));
  buf = new B(3);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x00, 0x00, 0x00]));
  buf = new B(2);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x00, 0x00]));
  buf = new B(1);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x00]));
  t.end();
});
test('handle invalid utf16 code points when encoding to utf8 the way node does', function(t) {
  var text = 'a' + '\uDE38\uD83D' + 'b';
  var buf = new B(8);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd, 0x62]));
  buf = new B(7);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd]));
  buf = new B(6);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0xef, 0xbf, 0xbd, 0x00, 0x00]));
  buf = new B(5);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0xef, 0xbf, 0xbd, 0x00]));
  buf = new B(4);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0xef, 0xbf, 0xbd]));
  buf = new B(3);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0x00, 0x00]));
  buf = new B(2);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61, 0x00]));
  buf = new B(1);
  buf.fill(0);
  buf.write(text);
  t.deepEqual(buf, new B([0x61]));
  t.end();
});
