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// Flags: --expose-internals
'use strict';
const common = require('../common');
const assert = require('assert');
const readline = require('readline');
const { Writable } = require('stream');
const { CSI } = require('internal/readline/utils');
{
assert(CSI);
assert.strictEqual(CSI.kClearToBeginning, '\x1b[1K');
assert.strictEqual(CSI.kClearToEnd, '\x1b[0K');
assert.strictEqual(CSI.kClearLine, '\x1b[2K');
assert.strictEqual(CSI.kClearScreenDown, '\x1b[0J');
assert.strictEqual(CSI`1${2}3`, '\x1b[123');
}
class TestWritable extends Writable {
constructor() {
super();
this.data = '';
}
_write(chunk, encoding, callback) {
this.data += chunk.toString();
callback();
}
}
const writable = new TestWritable();
assert.strictEqual(readline.clearScreenDown(writable), true);
assert.deepStrictEqual(writable.data, CSI.kClearScreenDown);
assert.strictEqual(readline.clearScreenDown(writable, common.mustCall()), true);
// Verify that clearScreenDown() throws on invalid callback.
assert.throws(() => {
readline.clearScreenDown(writable, null);
}, /ERR_INVALID_CALLBACK/);
// Verify that clearScreenDown() does not throw on null or undefined stream.
assert.strictEqual(readline.clearScreenDown(null, common.mustCall()), true);
assert.strictEqual(readline.clearScreenDown(undefined, common.mustCall()),
true);
writable.data = '';
assert.strictEqual(readline.clearLine(writable, -1), true);
assert.deepStrictEqual(writable.data, CSI.kClearToBeginning);
writable.data = '';
assert.strictEqual(readline.clearLine(writable, 1), true);
assert.deepStrictEqual(writable.data, CSI.kClearToEnd);
writable.data = '';
assert.strictEqual(readline.clearLine(writable, 0), true);
assert.deepStrictEqual(writable.data, CSI.kClearLine);
writable.data = '';
assert.strictEqual(readline.clearLine(writable, -1, common.mustCall()), true);
assert.deepStrictEqual(writable.data, CSI.kClearToBeginning);
// Verify that clearLine() throws on invalid callback.
assert.throws(() => {
readline.clearLine(writable, 0, null);
}, /ERR_INVALID_CALLBACK/);
// Verify that clearLine() does not throw on null or undefined stream.
assert.strictEqual(readline.clearLine(null, 0), true);
assert.strictEqual(readline.clearLine(undefined, 0), true);
assert.strictEqual(readline.clearLine(null, 0, common.mustCall()), true);
assert.strictEqual(readline.clearLine(undefined, 0, common.mustCall()), true);
// Nothing is written when moveCursor 0, 0
[
[0, 0, ''],
[1, 0, '\x1b[1C'],
[-1, 0, '\x1b[1D'],
[0, 1, '\x1b[1B'],
[0, -1, '\x1b[1A'],
[1, 1, '\x1b[1C\x1b[1B'],
[-1, 1, '\x1b[1D\x1b[1B'],
[-1, -1, '\x1b[1D\x1b[1A'],
[1, -1, '\x1b[1C\x1b[1A'],
].forEach((set) => {
writable.data = '';
assert.strictEqual(readline.moveCursor(writable, set[0], set[1]), true);
assert.deepStrictEqual(writable.data, set[2]);
writable.data = '';
assert.strictEqual(
readline.moveCursor(writable, set[0], set[1], common.mustCall()),
true
);
assert.deepStrictEqual(writable.data, set[2]);
});
// Verify that moveCursor() throws on invalid callback.
assert.throws(() => {
readline.moveCursor(writable, 1, 1, null);
}, /ERR_INVALID_CALLBACK/);
// Verify that moveCursor() does not throw on null or undefined stream.
assert.strictEqual(readline.moveCursor(null, 1, 1), true);
assert.strictEqual(readline.moveCursor(undefined, 1, 1), true);
assert.strictEqual(readline.moveCursor(null, 1, 1, common.mustCall()), true);
assert.strictEqual(readline.moveCursor(undefined, 1, 1, common.mustCall()),
true);
// Undefined or null as stream should not throw.
assert.strictEqual(readline.cursorTo(null), true);
assert.strictEqual(readline.cursorTo(), true);
assert.strictEqual(readline.cursorTo(null, 1, 1, common.mustCall()), true);
assert.strictEqual(readline.cursorTo(undefined, 1, 1, common.mustCall()), true);
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 'a'), true);
assert.strictEqual(writable.data, '');
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 'a', 'b'), true);
assert.strictEqual(writable.data, '');
writable.data = '';
common.expectsError(
() => readline.cursorTo(writable, 'a', 1),
{
type: TypeError,
code: 'ERR_INVALID_CURSOR_POS',
message: 'Cannot set cursor row without setting its column'
});
assert.strictEqual(writable.data, '');
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 1, 'a'), true);
assert.strictEqual(writable.data, '\x1b[2G');
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 1), true);
assert.strictEqual(writable.data, '\x1b[2G');
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 1, 2), true);
assert.strictEqual(writable.data, '\x1b[3;2H');
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 1, 2, common.mustCall()), true);
assert.strictEqual(writable.data, '\x1b[3;2H');
writable.data = '';
assert.strictEqual(readline.cursorTo(writable, 1, common.mustCall()), true);
assert.strictEqual(writable.data, '\x1b[2G');
// Verify that cursorTo() throws on invalid callback.
assert.throws(() => {
readline.cursorTo(writable, 1, 1, null);
}, /ERR_INVALID_CALLBACK/);