test/escape_sequences.js

   1 var glob = require('glob');
   2 var fs = require('fs');
   3 var pty = require('pty.js');
   4 var sleep = require('sleep');
   5 var Terminal = require('../src/xterm');
   6
   7 var CONSOLE_LOG = console.log;
   8
   9 // expect files need terminal at 80x25!
  10 var COLS = 80;
  11 var ROWS = 25;
  12
  13 // primitive pty pipe is enough for the test cases
  14 var primitive_pty = pty.native.open(COLS, ROWS);
  15
  16 // fake sychronous pty write - read
  17 // pty.js opens pipe fds with O_NONBLOCK
  18 // just wait 10ms instead of setting fds to blocking mode
  19 function pty_write_read(t, s) {
  20     fs.writeSync(t.slave, s);
  21     sleep.usleep(10000);
  22     var b = Buffer(64000);
  23     var bytes = fs.readSync(t.master, b, 0, 64000);
  24     return b.toString('utf8', 0, bytes);
  25 }
  26
  27 // generate noisy output to compare xterm and emulator
  28 function formatError(in_, out_, expected) {
  29     function addLineNumber(start, color) {
  30         var counter = start || 0;
  31         return function(s) {
  32             counter += 1;
  33             return '\x1b[33m' + (' ' + counter).slice(-2) + color + s;
  34         }
  35     }
  36     var line80 = '12345678901234567890123456789012345678901234567890123456789012345678901234567890';
  37     var s = '';
  38     s += '\n\x1b[34m' + JSON.stringify(in_);
  39     s += '\n\x1b[33m  ' + line80 + '\n';
  40     s += out_.split('\n').map(addLineNumber(0, '\x1b[31m')).join('\n');
  41     s += '\n\x1b[33m  ' + line80 + '\n';
  42     s += expected.split('\n').map(addLineNumber(0, '\x1b[32m')).join('\n');
  43     return s;
  44 }
  45
  46 // simple debug output of terminal cells
  47 function terminalToString(term) {
  48     var result = '';
  49     var line_s = '';
  50     for (var line=0; line<term.rows; ++line) {
  51         line_s = '';
  52         for (var cell=0; cell<term.cols; ++cell) {
  53             line_s += term.lines[line][cell][1];
  54         }
  55         // rtrim empty cells as xterm does
  56         line_s = line_s.replace(/\s+$/, '');
  57         result += line_s;
  58         result += '\n';
  59     }
  60     return result;
  61 }
  62
  63 describe('Escape code files', function() {
  64     var xterm;
  65
  66     beforeEach(function () {
  67         xterm = new Terminal(80, 25);
  68     });
  69
  70     // omit stack trace for escape sequence files
  71     Error.stackTraceLimit = 0;
  72     var files = glob.sync('test/escape_sequence_files/*.in');
  73     // first 44 are the most basic escape sequences
  74     for (var i=0; i<44; ++i) {
  75     //for (var i=0; i<files.length; ++i) {
  76         (function(filename){
  77             it(filename.split('/').slice(-1)[0], function () {
  78                 var in_file = fs.readFileSync(filename, 'utf8');
  79                 var from_pty = pty_write_read(primitive_pty, in_file);
  80                 // uncomment this to get log from terminal
  81                 console.log = function(){};
  82                 xterm.write(from_pty);
  83                 var from_emulator = terminalToString(xterm);
  84                 console.log = CONSOLE_LOG;
  85                 var expected = fs.readFileSync(filename.split('.')[0] + '.text', 'utf8');
  86                 if (from_emulator != expected) {
  87                     // uncomment to get noisy output
  88                     //throw new Error(formatError(in_file, from_emulator, expected));
  89                     throw new Error('mismatch');
  90                 }
  91             });
  92         })(files[i]);
  93     }
  94 });
  95