What you are looking for is Automated UI-Testing
This example JavaScript code changes the device orientation for example:
var target = UIATarget.localTarget();
var app = target.frontMostApp();
//set orientation to landscape left
target.setDeviceOrientation(UIA_DEVICE_ORIENTATION_LANDSCAPELEFT);
UIALogger.logMessage("Current orientation now " + app.interfaceOrientation());
//reset orientation to portrait
target.setDeviceOrientation(UIA_DEVICE_ORIENTATION_PORTRAIT);
UIALogger.logMessage("Current orientation now " + app.interfaceOrientation());
For testing, if your layout has changed to RTL or LTR you could try to access specific UI Elements and check their content against an expected content. So here is another example to check the contents of a TableViewCell from the official docs:
The crux of testing is being able to verify that each test has been performed and that it has either passed or failed. This code example runs the test testName to determine whether a valid element recipe element whose name starts with “Tarte” exists in the recipe table view. First, a local variable is used to specify the cell criteria:
var cell = UIATarget.localTarget().frontMostApp().mainWindow() \
.tableViews()[0].cells().firstWithPredicate("name beginswith 'Tarte'");
Next, the script uses the isValid method to test whether a valid element matching those criteria exists in the recipe table view.
if (cell.isValid()) {
UIALogger.logPass(testName);
} else {
UIALogger.logFail(testName);
}
If a valid cell is found, the code logs a pass message for the testName test; if not, it logs a failure message.
Notice that this test specifies firstWithPredicate and "name
beginsWith 'Tarte'". These criteria yield a reference to the cell for
“Tarte aux Fraises,” which works for the default data already in the
Recipes sample app. If, however, a user adds a recipe for “Tarte aux
Framboises,” this example may or may not give the desired results.
If you want to test a specific scheme:
Executing an Automation Instrument Script in Xcode
After you have created your customized Automation template, you can execute your test script from Xcode by following these steps:
Open your project in Xcode.
From the Scheme pop-up menu (in the workspace window toolbar), select Edit Scheme for a scheme with which you would like to use your script.
Select Profile from the left column of the scheme editing dialog.
Choose your application from the Executable pop-up menu.
Choose your customized Automation Instrument template from the Instrument pop-up menu.
Click OK to approve your changes and dismiss the scheme editor dialog.
Choose Product > Profile.
Instruments launches and executes your test script.
