# Design Patterns in XCUITest

[**Design Patterns in XCUITest**](https://docs.google.com/presentation/d/1Bkt3f23pXboI3UJXdEQxLtJU1YZU74QBleKXQueuEYo/mobilepresent?slide=id.p)

* Page Object 

![](/files/-M4Y03bS_VpL4PFxf7wP)

* Fluent Interface

![](/files/-M4Y03bEAjVzXLYfmN_w)

* Wait until page/element load  

![](/files/-M4Y03bhFD6ngdMDWxZQ)

![](/files/-M4Y03biHjf6OY0dkg9c)

* Using check() instead of grab & hope 

![](/files/-M4Y03bdCPDUav5KniY4)

* Use Launch Argument to Set Up  

![](/files/-M4Y03bPPKCHLV-ZeMDI)

![](/files/-M4Y03bQdIOcoiMMd913)

* [**Launch Arguments**](https://www.matrixprojects.net/p/ui-testing-with-user-defaults/)

### Launch Arguments

```swift
MyAppUITest.swift
...
override func setUp() {
  super.setUp()

  let app = XCUIApplication()
  app.launchArguments.append("ui-testing")
  app.launch()
}
...

MyAppDelegate.swift
...
func setupModel() -> Model {
  let uiTesting = NSProcessInfo.processInfo().arguments.contains("ui-testing")

  let model = uiTesting ? StubModel() : NetworkModel()

  return model
}
...
```

### NSUserDefaults

```swift
MyAppUITest.swift
...
override func setUp() {
  super.setUp()

  let app = XCUIApplication()
  app.launchArguments.appendContentsOf(["-ui-testing","YES"])
  app.launch()
}
...

MyAppDelegate.swift
...
func setupModel() -> Model {
  let defaults = NSUserDefaults.standardUserDefaults()
  let uiTesting = defaults.boolForKey("ui-testing")

  let model = uiTesting ? StubModel() : NetworkModel()

  return model
}
...
```


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