Add tests for app launching

test/test.js

@@ -0,0 +1,81 @@
+const webdriverio = require('webdriverio');
+const should = require('should');
+const path = require('path');
+const fs = require('fs');
+
+const exe_extension = (process.platform === 'win32') ? ".exe" : "";
+const source_root_dir = path.join(__dirname, '..');
+const electron_binary_path = path.join(source_root_dir, 'node_modules/electron-prebuilt/dist/electron' + exe_extension);
+const config_file_path = path.join(source_root_dir, 'test_config.json');
+const mattermost_url = 'http://example.com/team';
+
+var chromedriver = require('child_process').spawn('node_modules/chromedriver/lib/chromedriver/chromedriver', ['--url-base=wd/hub', '--port=9515']);
+
+var options = {
+  host: "localhost", // Use localhost as chrome driver server
+  port: 9515, // "9515" is the port opened by chrome driver.
+  desiredCapabilities: {
+    browserName: 'chrome',
+    chromeOptions: {
+      binary: electron_binary_path, // Path to your Electron binary.
+      args: ['app=' + path.join(source_root_dir, 'src'), '--config-file=' + config_file_path] // Optional, perhaps 'app=' + /path/to/your/app/
+    }
+  }
+};
+
+describe('electron-mattermost', function() {
+  before(function(done) {
+    fs.unlink(config_file_path, function(err) {
+      done();
+    });
+  });
+
+  it('should show settings.html when there is no config file', function(done) {
+    var client = webdriverio.remote(options);
+    client
+      .init()
+      .getUrl().then(function(url) {
+        var p = path.parse(url);
+        p.base.should.equal('settings.html');
+      })
+      .end().then(function() {
+        done();
+      });
+  });
+
+  it('should show index.html when there is config file', function(done) {
+    fs.writeFileSync(config_file_path, JSON.stringify({
+      url: mattermost_url
+    }));
+    var client = webdriverio.remote(options);
+    client
+      .init()
+      .getUrl().then(function(url) {
+        var p = path.parse(url);
+        p.base.should.equal('index.html');
+      })
+      .end().then(function() {
+        done();
+      });
+  });
+
+  describe('index.html', function() {
+    before(function() {
+      fs.writeFileSync(config_file_path, JSON.stringify({
+        url: mattermost_url
+      }));
+    });
+
+    it('should set src of #mainWebview from config file', function(done) {
+      var client = webdriverio.remote(options);
+      client
+        .init()
+        .getAttribute('#mainWebview', 'src').then(function(attribute) {
+          attribute.should.equal(mattermost_url);
+        })
+        .end().then(function() {
+          done();
+        });
+    });
+  });
+});