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'use strict'; require('../common'); const assert = require('assert'); const Stream = require('stream'); const repl = require('repl'); const tests = [ testSloppyMode, testStrictMode, testAutoMode, testStrictModeTerminal, ]; tests.forEach(function(test) { test(); }); function testSloppyMode() { const cli = initRepl(repl.REPL_MODE_SLOPPY); cli.input.emit('data', 'x = 3\n'); assert.strictEqual(cli.output.accumulator.join(''), '> 3\n> '); cli.output.accumulator.length = 0; cli.input.emit('data', 'let y = 3\n'); assert.strictEqual(cli.output.accumulator.join(''), 'undefined\n> '); } function testStrictMode() { const cli = initRepl(repl.REPL_MODE_STRICT); cli.input.emit('data', 'x = 3\n'); assert.match(cli.output.accumulator.join(''), /ReferenceError: x is not defined/); cli.output.accumulator.length = 0; cli.input.emit('data', 'let y = 3\n'); assert.strictEqual(cli.output.accumulator.join(''), 'undefined\n> '); } function testStrictModeTerminal() { if (!process.features.inspector) { console.warn('Test skipped: V8 inspector is disabled'); return; } // Verify that ReferenceErrors are reported in strict mode previews. const cli = initRepl(repl.REPL_MODE_STRICT, { terminal: true }); cli.input.emit('data', 'xyz '); assert.ok( cli.output.accumulator.includes('\n// ReferenceError: xyz is not defined') ); } function testAutoMode() { const cli = initRepl(repl.REPL_MODE_MAGIC); cli.input.emit('data', 'x = 3\n'); assert.strictEqual(cli.output.accumulator.join(''), '> 3\n> '); cli.output.accumulator.length = 0; cli.input.emit('data', 'let y = 3\n'); assert.strictEqual(cli.output.accumulator.join(''), 'undefined\n> '); } function initRepl(mode, options) { const input = new Stream(); input.write = input.pause = input.resume = () => {}; input.readable = true; const output = new Stream(); output.write = output.pause = output.resume = function(buf) { output.accumulator.push(buf); }; output.accumulator = []; output.writable = true; return repl.start({ input: input, output: output, useColors: false, terminal: false, replMode: mode, ...options }); }