After a tested Electron application and a TestComplete project are prepared for testing, you can create a test and run it. The easiest way to create a test is to record a sequence of user actions over the application:

If your tested Electron application is running, close it.
To start recording, from the TestComplete main menu, select Test > Record > Record Keyword Test:
Important: Expand the Recording toolbar, click Run App, and then select your tested Electron application:

If you run your tested application not from TestComplete, but in any other way (for instance, from the command line), TestComplete will not be able to expose your application internal objects. To test Electron applications, always start them from TestComplete (see the Exposing Electron Applications section in the About Testing Electron Applications topic).
TestComplete will launch the tested application:
Click anywhere within the main page of the application.
Create a property checkpoint that will verify the text that the application window shows:
- On the Recording toolbar, click Add Check. In the resulting Checkpoint wizard, click Object property:
  
  Click the image to enlarge it.
- Select the Hello World! text on the main page. To select the text, you can –
  
  Press , drag the target glyph to the text, and then release the mouse button.
  
  Click , move the mouse pointer to the text, and then press the Select object shortcut (by default, SHIFT+CTRL+A).
  
  Click the image to enlarge it.
- On the next page of the wizard, select the contentText property (selected by default):
  
  Click the image to enlarge it.
- Click Finish.
Close your tested application and click Stop on the Recording toolbar.