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'use strict';
const common = require('../common');
const assert = require('assert');
const { REPLServer } = require('repl');
const { Stream } = require('stream');
const { inspect } = require('util');
common.skipIfInspectorDisabled();
// Ignore terminal settings. This is so the test can be run intact if TERM=dumb.
process.env.TERM = '';
const PROMPT = 'repl > ';
class REPLStream extends Stream {
readable = true;
writable = true;
constructor() {
super();
this.lines = [''];
}
run(data) {
for (const entry of data) {
this.emit('data', entry);
}
this.emit('data', '\n');
}
write(chunk) {
const chunkLines = chunk.toString('utf8').split('\n');
this.lines[this.lines.length - 1] += chunkLines[0];
if (chunkLines.length > 1) {
this.lines.push(...chunkLines.slice(1));
}
this.emit('line');
return true;
}
wait() {
this.lines = [''];
return new Promise((resolve, reject) => {
const onError = (err) => {
this.removeListener('line', onLine);
reject(err);
};
const onLine = () => {
if (this.lines[this.lines.length - 1].includes(PROMPT)) {
this.removeListener('error', onError);
this.removeListener('line', onLine);
resolve(this.lines);
}
};
this.once('error', onError);
this.on('line', onLine);
});
}
pause() {}
resume() {}
}
function runAndWait(cmds, repl) {
const promise = repl.inputStream.wait();
for (const cmd of cmds) {
repl.inputStream.run(cmd);
}
return promise;
}
async function tests(options) {
const repl = REPLServer({
prompt: PROMPT,
stream: new REPLStream(),
ignoreUndefined: true,
useColors: true,
...options
});
repl.inputStream.run([
'function foo(x) { return x; }',
'function koo() { console.log("abc"); }',
'a = undefined;',
]);
const testCases = [{
input: 'foo',
noPreview: '[Function: foo]',
preview: [
'foo',
'\x1B[90m[Function: foo]\x1B[39m\x1B[11G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[36m[Function: foo]\x1B[39m',
]
}, {
input: 'koo',
noPreview: '[Function: koo]',
preview: [
'k\x1B[90moo\x1B[39m\x1B[9G',
'\x1B[90m[Function: koo]\x1B[39m\x1B[9G\x1B[1A\x1B[1B\x1B[2K\x1B[1A' +
'\x1B[0Ko\x1B[90mo\x1B[39m\x1B[10G',
'\x1B[90m[Function: koo]\x1B[39m\x1B[10G\x1B[1A\x1B[1B\x1B[2K\x1B[1A' +
'\x1B[0Ko',
'\x1B[90m[Function: koo]\x1B[39m\x1B[11G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[36m[Function: koo]\x1B[39m',
]
}, {
input: 'a',
noPreview: 'repl > ', // No "undefined" output.
preview: ['a\r'] // No "undefined" preview.
}, {
input: " { b: 1 }['b'] === 1",
noPreview: '\x1B[33mtrue\x1B[39m',
preview: [
" { b: 1 }['b']",
'\x1B[90m1\x1B[39m\x1B[22G\x1B[1A\x1B[1B\x1B[2K\x1B[1A ',
'\x1B[90m1\x1B[39m\x1B[23G\x1B[1A\x1B[1B\x1B[2K\x1B[1A=== 1',
'\x1B[90mtrue\x1B[39m\x1B[28G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m',
]
}, {
input: "{ b: 1 }['b'] === 1;",
noPreview: '\x1B[33mfalse\x1B[39m',
preview: [
"{ b: 1 }['b']",
'\x1B[90m1\x1B[39m\x1B[21G\x1B[1A\x1B[1B\x1B[2K\x1B[1A ',
'\x1B[90m1\x1B[39m\x1B[22G\x1B[1A\x1B[1B\x1B[2K\x1B[1A=== 1',
'\x1B[90mtrue\x1B[39m\x1B[27G\x1B[1A\x1B[1B\x1B[2K\x1B[1A;',
'\x1B[90mfalse\x1B[39m\x1B[28G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mfalse\x1B[39m',
]
}, {
input: '{ a: true }',
noPreview: '{ a: \x1B[33mtrue\x1B[39m }',
preview: [
'{ a: tru\x1B[90me\x1B[39m\x1B[16G\x1B[0Ke }\r',
'{ a: \x1B[33mtrue\x1B[39m }',
]
}, {
input: '{ a: true };',
noPreview: '\x1B[33mtrue\x1B[39m',
preview: [
'{ a: tru\x1B[90me\x1B[39m\x1B[16G\x1B[0Ke };',
'\x1B[90mtrue\x1B[39m\x1B[20G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m',
]
}, {
input: ' \t { a: true};',
noPreview: '\x1B[33mtrue\x1B[39m',
preview: [
' { a: tru\x1B[90me\x1B[39m\x1B[18G\x1B[0Ke}',
'\x1B[90m{ a: true }\x1B[39m\x1B[20G\x1B[1A\x1B[1B\x1B[2K\x1B[1A;',
'\x1B[90mtrue\x1B[39m\x1B[21G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m',
]
}, {
input: '1n + 2n',
noPreview: '\x1B[33m3n\x1B[39m',
preview: [
'1n + 2',
'\x1B[90mType[39m\x1B[14G\x1B[1A\x1B[1B\x1B[2K\x1B[1An',
'\x1B[90m3n\x1B[39m\x1B[15G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m3n\x1B[39m',
]
}, {
input: '{};1',
noPreview: '\x1B[33m1\x1B[39m',
preview: [
'{};1',
'\x1B[90m1\x1B[39m\x1B[12G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m1\x1B[39m',
]
}];
const hasPreview = repl.terminal &&
(options.preview !== undefined ? !!options.preview : true);
for (const { input, noPreview, preview } of testCases) {
console.log(`Testing ${input}`);
const toBeRun = input.split('\n');
let lines = await runAndWait(toBeRun, repl);
if (hasPreview) {
// Remove error messages. That allows the code to run in different
// engines.
// eslint-disable-next-line no-control-regex
lines = lines.map((line) => line.replace(/Error: .+?\x1B/, ''));
assert.strictEqual(lines.pop(), '\x1B[1G\x1B[0Jrepl > \x1B[8G');
assert.deepStrictEqual(lines, preview);
} else {
assert.ok(lines[0].includes(noPreview), lines.map(inspect));
if (preview.length !== 1 || preview[0] !== `${input}\r`)
assert.strictEqual(lines.length, 2);
}
}
}
tests({ terminal: false }); // No preview
tests({ terminal: true }); // Preview
tests({ terminal: false, preview: false }); // No preview
tests({ terminal: false, preview: true }); // No preview
tests({ terminal: true, preview: true }); // Preview
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