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'use strict';
// Flags: --expose_internals
const common = require('../common');
const readline = require('readline');
const assert = require('assert');
const EventEmitter = require('events').EventEmitter;
const { getStringWidth } = require('internal/util/inspect');
// This test verifies that the tab completion supports unicode and the writes
// are limited to the minimum.
[
'あ',
'𐐷',
'🐕'
].forEach((char) => {
[true, false].forEach((lineBreak) => {
const completer = (line) => [
[
'First group',
'',
`${char}${'a'.repeat(10)}`, `${char}${'b'.repeat(10)}`, char.repeat(11),
],
line
];
let output = '';
const width = getStringWidth(char) - 1;
class FakeInput extends EventEmitter {
columns = ((width + 1) * 10 + (lineBreak ? 0 : 10)) * 3
write = common.mustCall((data) => {
output += data;
}, 6)
resume() {}
pause() {}
end() {}
}
const fi = new FakeInput();
const rli = new readline.Interface({
input: fi,
output: fi,
terminal: true,
completer: completer
});
const last = '\r\nFirst group\r\n\r\n' +
`${char}${'a'.repeat(10)}${' '.repeat(2 + width * 10)}` +
`${char}${'b'.repeat(10)}` +
(lineBreak ? '\r\n' : ' '.repeat(2 + width * 10)) +
`${char.repeat(11)}\r\n` +
`\r\n\u001b[1G\u001b[0J> ${char}\u001b[${4 + width}G`;
const expectations = [char, '', last];
rli.on('line', common.mustNotCall());
for (const character of `${char}\t\t`) {
fi.emit('data', character);
assert.strictEqual(output, expectations.shift());
output = '';
}
rli.close();
});
});
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