Merge pull request #9959 from brendandahl/test-util

Utility script to add a reference test.

test/add_test.js

@@ -0,0 +1,68 @@
+const fs = require('fs');
+const crypto = require('crypto');
+const execSync = require('child_process').execSync;
+
+const testManifest = 'test/test_manifest.json';
+const pdfFolder = 'test/pdfs/';
+const gitIgnore = 'test/pdfs/.gitignore';
+
+if (process.argv.length < 3) {
+  console.log('\nUsage: node add_test.js FILE\n');
+  console.log('  Add a PDF as a reference test. FILE must be located in ' +
+              `${pdfFolder}`);
+  process.exit(1);
+}
+
+let file = process.argv[2];
+if (!file.startsWith(pdfFolder)) {
+  throw new Error(`PDF file must be in '${pdfFolder}' directory.`);
+}
+if (!fs.existsSync(file)) {
+  throw new Error(`PDF file does not exist '${file}'.`);
+}
+
+function calculateMD5(file, callback) {
+  var hash = crypto.createHash('md5');
+  var stream = fs.createReadStream(file);
+  stream.on('data', function (data) {
+    hash.update(data);
+  });
+  stream.on('error', function (err) {
+    callback(err);
+  });
+  stream.on('end', function() {
+    var result = hash.digest('hex');
+    callback(null, result);
+  });
+}
+
+function getRandomArbitrary(min, max) {
+  return Math.floor(Math.random() * (max - min) + min);
+}
+
+calculateMD5(file, (err, md5) => {
+  if (err) {
+    throw new Error(err);
+  }
+  let contents = fs.readFileSync(gitIgnore, 'utf8').split('\n');
+  let randomLine = getRandomArbitrary(10, contents.length - 2);
+  contents.splice(randomLine, 0, '!' + file.substr(file.lastIndexOf('/') + 1));
+  fs.writeFileSync('test/pdfs/.gitignore', contents.join('\n'));
+
+  contents = fs.readFileSync(testManifest, 'utf8');
+  let pdf = file.substring(file.lastIndexOf('/') + 1, file.length - 4);
+  let randomPoint = getRandomArbitrary(100, contents.length - 20);
+  let bracket = contents.indexOf('},\n', randomPoint);
+  let out = contents.substr(0, bracket) +
+    '},\n' +
+    `    {  "id": "${pdf}",\n` +
+    `       "file": "pdfs/${pdf}.pdf",\n` +
+    `       "md5": "${md5}",\n` +
+    '       "rounds": 1,\n' +
+    '       "type": "eq"\n' +
+    '    ' +
+    contents.substr(bracket);
+  fs.writeFileSync('test/test_manifest.json', out);
+  execSync(`git add ${testManifest} ${gitIgnore}`);
+  execSync(`git add ${file}`);
+});