ecmascript 0.2.0

A rust implementation of an ECMAScript parser
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'use strict'

var path = require('path');

var testDir = path.join(__dirname, '..', 'node_modules', 'test262');
var whitelistFile = path.join(__dirname, 'test-262-whitelist.txt');
var shouldUpdate = process.argv.indexOf('--update-whitelist') > -1;
var esprima = require('..');

var TestStream = require('test262-stream');
var Interpreter = require('results-interpreter');
function normalizePath(str) {
    return path.posix.format(path.parse(str));
}

var stream = new TestStream(testDir);
var Transform = require('stream').Transform;
var results = new Transform({
    objectMode: true,
    transform(test, encoding, done) {
        var result = {
            id: normalizePath(test.file) + '(' + test.scenario + ')',
            expected: test.attrs.negative && test.attrs.negative.phase === 'early'
                ? 'fail' : 'pass'
        };
        var parse = test.attrs.flags.module ?
            esprima.parseModule : esprima.parseScript;

        try {
            parse(test.contents);
            result.actual = 'pass';
        } catch (err) {
            result.actual = 'fail';
        }

        done(null, result);
    }
});
var interpreter = new Interpreter(whitelistFile, {
    outputFile: shouldUpdate ? whitelistFile : null
});

console.log('Now running tests...');
if (shouldUpdate) {
    console.log(
        'The whitelist file will be updated according to the results of this ' +
        'test run.'
    );
} else {
    console.log(
        'Note: the whitelist file may be automatically updated by specifying ' +
        'the `--update-whitelist` flag.'
    );
}
stream.pipe(results)
    .pipe(interpreter)
    .on('error', (error) => {
        console.error(error);
        process.exitCode = 1;
    })
    .on('finish', function () {
        report(this.summary);
        process.exitCode = this.summary.passed ? 0 : 1;
    });

function report(summary) {
    var goodnews = [
        summary.allowed.success.length + ' valid programs parsed without error',
        summary.allowed.failure.length +
        ' invalid programs produced a parsing error',
        summary.allowed.falsePositive.length +
        ' invalid programs did not produce a parsing error' +
        ' (and allowed by the whitelist file)',
        summary.allowed.falseNegative.length +
        ' valid programs produced a parsing error' +
        ' (and allowed by the whitelist file)'
    ];
    var badnews = [];
    var badnewsDetails = [];

    void [
        {
            tests: summary.disallowed.success,
            label:
                'valid programs parsed without error' +
                ' (in violation of the whitelist file)'
        },
        {
            tests: summary.disallowed.failure,
            label:
                'invalid programs produced a parsing error' +
                ' (in violation of the whitelist file)'
        },
        {
            tests: summary.disallowed.falsePositive,
            label:
                'invalid programs did not produce a parsing error' +
                ' (without a corresponding entry in the whitelist file)'
        },
        {
            tests: summary.disallowed.falseNegative,
            label:
                'valid programs produced a parsing error' +
                ' (without a corresponding entry in the whitelist file)'
        },
        {
            tests: summary.unrecognized,
            label: 'non-existent programs specified in the whitelist file'
        }
    ].forEach(function (entry) {
        var tests = entry.tests;
        var label = entry.label;

        if (!tests.length) {
            return;
        }

        var desc = tests.length + ' ' + label;

        badnews.push(desc);
        badnewsDetails.push(desc + ':');
        badnewsDetails.push.apply(
            badnewsDetails,
            tests.map(function (test) {
                return test.id || test;
            })
        );
    });

    console.log('Testing complete.');
    console.log('Summary:');
    console.log(goodnews.join('\n').replace(/^/gm, ' ✔ '));

    if (!summary.passed) {
        console.log('');
        console.log(badnews.join('\n').replace(/^/gm, ' ✘ '));
        console.log('');
        console.log('Details:');
        console.log(badnewsDetails.join('\n').replace(/^/gm, '   '));
    }
}