compat.js

/*
  Copyright (C) 2012 Joost-Wim Boekesteijn <[email protected]>
  Copyright (C) 2011 Ariya Hidayat <[email protected]>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*jslint node: true */
/*global document: true, window:true, esprima: true, testReflect: true */

var runTests;

function getContext(esprima, reportCase, reportFailure) {
    'use strict';

    var Reflect, Pattern;

    // Maps Mozilla Reflect object to our Esprima parser.
    Reflect = {
        parse: function (code) {
            var result;

            reportCase(code);

            try {
                result = esprima.parse(code);
            } catch (error) {
                result = error;
            }

            return result;
        }
    };

    // This is used by Reflect test suite to match a syntax tree.
    Pattern = function (obj) {
        var pattern;

        // Poor man's deep object cloning.
        pattern = JSON.parse(JSON.stringify(obj));

        // Special handling for regular expression literal since we need to
        // convert it to a string literal, otherwise it will be decoded
        // as object "{}" and the regular expression would be lost.
        if (obj.type && obj.type === 'Literal') {
            if (obj.value instanceof RegExp) {
                pattern = {
                    type: obj.type,
                    value: obj.value.toString()
                };
            }
        }

        // Special handling for branch statement because SpiderMonkey
        // prefers to put the 'alternate' property before 'consequent'.
        if (obj.type && obj.type === 'IfStatement') {
            pattern = {
                type: pattern.type,
                test: pattern.test,
                consequent: pattern.consequent,
                alternate: pattern.alternate
            };
        }

        // Special handling for do while statement because SpiderMonkey
        // prefers to put the 'test' property before 'body'.
        if (obj.type && obj.type === 'DoWhileStatement') {
            pattern = {
                type: pattern.type,
                body: pattern.body,
                test: pattern.test
            };
        }

        function adjustRegexLiteralAndRaw(key, value) {
            if (key === 'value' && value instanceof RegExp) {
                value = value.toString();
            } else if (key === 'raw' && typeof value === "string") {
                // Ignore Esprima-specific 'raw' property.
                return undefined;
            } else if (key === 'regex' && typeof value === "object") {
                // Ignore Esprima-specific 'regex' property.
                return undefined;
            }
            return value;
        }

        if (obj.type && (obj.type === 'Program')) {
            pattern.assert = function (tree) {
                var actual, expected;
                actual = JSON.stringify(tree, adjustRegexLiteralAndRaw, 4);
                expected = JSON.stringify(obj, null, 4);

                if (expected !== actual) {
                    reportFailure(expected, actual);
                }
            };
        }

        return pattern;
    };

    return {
        Reflect: Reflect,
        Pattern: Pattern
    };
}

if (typeof window !== 'undefined') {
    // Run all tests in a browser environment.
    runTests = function () {
        'use strict';

        var total = 0,
            failures = 0;

        function setText(el, str) {
            if (typeof el.innerText === 'string') {
                el.innerText = str;
            } else {
                el.textContent = str;
            }
        }

        function reportCase(code) {
            var report, e;
            report = document.getElementById('report');
            e = document.createElement('pre');
            e.setAttribute('class', 'code');
            setText(e, code);
            report.appendChild(e);
            total += 1;
        }

        function reportFailure(expected, actual) {
            var report, e;

            failures += 1;

            report = document.getElementById('report');

            e = document.createElement('p');
            setText(e, 'Expected');
            report.appendChild(e);

            e = document.createElement('pre');
            e.setAttribute('class', 'expected');
            setText(e, expected);
            report.appendChild(e);

            e = document.createElement('p');
            setText(e, 'Actual');
            report.appendChild(e);

            e = document.createElement('pre');
            e.setAttribute('class', 'actual');
            setText(e, actual);
            report.appendChild(e);
        }

        setText(document.getElementById('version'), esprima.version);

        window.setTimeout(function () {
            var tick, context = getContext(esprima, reportCase, reportFailure);

            tick = new Date();
            testReflect(context.Reflect, context.Pattern);
            tick = (new Date()) - tick;

            if (failures > 0) {
                document.getElementById('status').className = 'alert-box alert';
                setText(document.getElementById('status'), total + ' tests. ' +
                    'Failures: ' + failures + '. ' + tick + ' ms');
            } else {
                document.getElementById('status').className = 'alert-box success';
                setText(document.getElementById('status'), total + ' tests. ' +
                    'No failure. ' + tick + ' ms');
            }
        }, 11);
    };
} else {
    (function (global) {
        'use strict';
        var esprima = require('../esprima'),
            tick,
            total = 0,
            failures = [],
            header,
            current,
            context;

        function reportCase(code) {
            total += 1;
            current = code;
        }

        function reportFailure(expected, actual) {
            failures.push({
                source: current,
                expected: expected.toString(),
                actual: actual.toString()
            });
        }

        context = getContext(esprima, reportCase, reportFailure);

        tick = new Date();
        require('./reflect').testReflect(context.Reflect, context.Pattern);
        tick = (new Date()) - tick;

        header = total + ' tests. ' + failures.length + ' failures. ' +
            tick + ' ms';
        if (failures.length) {
            console.error(header);
            failures.forEach(function (failure) {
                console.error(failure.source + ': Expected\n    ' +
                    failure.expected.split('\n').join('\n    ') +
                    '\nto match\n    ' + failure.actual);
            });
        } else {
            console.log(header);
        }
        process.exit(failures.length === 0 ? 0 : 1);
    }(this));
}
/* vim: set sw=4 ts=4 et tw=80 : */