Initial version of grader.js and checks.json

checks.json

@@ -0,0 +1,2 @@
+["h1",
+ ".navigation"]

grader.js

@@ -0,0 +1,50 @@
+#!/usr/bin/env node
+
+var fs = require('fs');
+var program = require('commander');
+var cheerio = require('cheerio');
+var HTMLFILE_DEFAULT = "index.html";
+var CHECKSFILE_DEFAULT = "checks.json";
+
+var assertFileExists = function(infile){
+ var instr = infile.toString();
+ if(!fs.existsSync(instr)) {
+ console.log("%s does not exist. Exiting.", instr);
+ process.exit(1);
+ }
+ return instr;
+};
+
+var cheerioHtmlFile = function(htmlfile) {
+ return cheerio.load(fs.readFileSync(htmlfile));
+};
+
+var loadChecks = function(checksfile) {
+ return JSON.parse(fs.readFileSync(checksfile));
+};
+
+var checkHtmlFile = function(htmlfile, checksfile){
+ $ = cheerioHtmlFile(htmlfile);
+ var checks = loadChecks(checksfile).sort();
+ var out = {};
+ for(var ii in checks) {
+ var present = $(checks[ii]).length > 0;
+ out[checks[ii]] = present;
+ }
+ return out;
+};
+
+var clone = function(fn) {
+ return fn.bind({});
+}
+if(require.main == module) {
+ program
+ .option('-c, --checks <check_file>', 'Path to checks.json', clone(assertFileExists), CHECKSFILE_DEFAULT)
+ .option('-f, --file <html_file>', 'Path to index.html', clone(assertFileExists), HTMLFILE_DEFAULT)
+ .parse(process.argv);
+ var checkJson = checkHtmlFile(program.file, program.checks);
+ var outJson = JSON.stringify(checkJson, null, 4);
+ console.log(outJson);
+}else{
+ exports.checkHtmlFile = checkHtmlFile;
+}