Test command implemented with Promises

index.js

@@ -0,0 +1,26 @@
+'use strict';
+
+var Promise = require('promise');
+var process = require('child_process');
+var os = require('os');
+var path = require('path');
+
+module.exports.test = function test(archivePath) {
+
+  return new Promise(function (fulfill, reject){
+    var command = '7z t ' + archivePath;
+    process.exec(command, function (err, stdout, stderr) {
+      //TODO: Custom error
+      if (err) return reject(err);
+      if (stderr) return reject(stderr);
+      var r = [];
+      stdout.split(os.EOL).forEach(function (_line) {
+        if (_line.substr(0, 12) === 'Testing     ') {
+          return r.push(_line.substr(12, _line.length).replace(path.sep, '/'));
+        }
+      });
+      return fulfill(r);
+    });
+  });
+
+};

test/index.js

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+'use strict';
+var sevenzip = require('../index');
+var expect = require('chai').expect;
+
+describe('Specifications for the `test` function', function(){
+
+  it('should get an error when 7z gets an error', function (done) {
+    sevenzip.test('test/resource/nothere.7z')
+      .then(null, function (err) {
+        expect(err.message.substr(0, 14)).to.eql('Command failed');
+        done();
+      });
+  });
+
+  it('should get a list of files and directories', function (done) {
+    sevenzip.test('test/resource/resource.7z')
+      .then(function (files) {
+        expect(files.length).to.be.at.least(6);
+        done();
+      });
+  });
+
+});