intern-a11y/services/axe.js

Intern-a11y. An accessibility testing helper for Intern.

"use strict";
var fs_1 = require("fs");
var common_1 = require("../common");
var _axe_1 = require("./_axe");
function createChecker(options) {
    return function () {
        options = options || {};
        var axePath = require.resolve('axe-core/axe.min');
        var axeScript = fs_1.readFileSync(axePath, { encoding: 'utf8' });
        var axeContext = options.context;
        var config = options.config;
        var axeConfig = null;
        if (config) {
            axeConfig = {
                branding: config.branding,
                reporter: config.reporter,
                rules: config.rules
            };
            if (config.checks) {
                axeConfig.checks = config.checks.map(function (check) {
                    return {
                        id: check.id,
                        evaluate: check.evaluate.toString(),
                        after: check.after ? check.after.toString() : undefined,
                        options: check.options,
                        matches: check.matches,
                        enabled: check.enabled
                    };
                });
            }
        }
        return this.parent
            .getExecuteAsyncTimeout()
            .then(function (timeout) {
            return this.parent
                .setExecuteAsyncTimeout(30000)
                .execute(axeScript, [])
                .executeAsync("return (function (config, context, done) {\n\t\t\t\t\t\tif (config) {\n\t\t\t\t\t\t\tif (config.checks) {\n\t\t\t\t\t\t\t\tconfig.checks.forEach(function (check) {\n\t\t\t\t\t\t\t\t\teval('check.evaluate = ' + check.evaluate);\n\t\t\t\t\t\t\t\t\tif (check.after) {\n\t\t\t\t\t\t\t\t\t\teval('check.after = ' + check.after);\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\taxe.configure(config);\n\t\t\t\t\t\t}\n\t\t\t\t\t\tif (!context) {\n\t\t\t\t\t\t\tcontext = document;\n\t\t\t\t\t\t}\n\t\t\t\t\t\taxe.a11yCheck(context, function(results) {\n\t\t\t\t\t\t\tdone(results);\n\t\t\t\t\t\t});\n\t\t\t\t\t}).apply(this, arguments)", [axeConfig, axeContext])
                .then(function (results) {
                var a11yResults = _axe_1.toA11yResults(results);
                var numViolations = (results.violations && results.violations.length) || 0;
                var error;
                if (numViolations === 1) {
                    error = new common_1.A11yError('1 a11y violation was logged', a11yResults);
                }
                if (numViolations > 1) {
                    error = new common_1.A11yError(numViolations + ' a11y violations were logged', a11yResults);
                }
                if (error) {
                    throw error;
                }
                return a11yResults;
            })
                .then(function (results) {
                return this.parent
                    .setExecuteAsyncTimeout(timeout)
                    .then(function () {
                    return results;
                });
            }, function (error) {
                return this.parent
                    .setExecuteAsyncTimeout(timeout)
                    .then(function () {
                    throw error;
                });
            });
        });
    };
}
exports.createChecker = createChecker;
function check(options) {
    if (options.remote == null) {
        return Promise.reject(new Error('A remote is required when calling check()'));
    }
    var chain = options.remote.get(options.source);
    if (options.waitFor) {
        chain = chain.sleep(options.waitFor);
    }
    return chain.then(createChecker(options));
}
exports.check = check;
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