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In Appium, UI Automator is a User Interface testing framework best suited for cross-app functional UI testing across systems and other installed APPS. The UI Automator APIS allow you to perform various operations such as opening the Settings menu or also opening the app launcher in a test DEVICE.

UDID stands for Unique Device Identifier. It is required during the PROCESS of Android application development or also during Android App automation to GET a unique ID of a specific Android device.

Here’s a list of STEPS to successfully find your device UDID

• Go to settings for your Mobile device- About Phone - Build Number -Tap 7 times to enable Developer options.
• Go to Developer options, under Debugging -> Make sure to enable USB debugging ON.
• Now connect your mobile device(using a USB cable) to your PC.
• Open Command Prompt and type below command
  -> ADB devices
• Note down the UDID of your device. It will APPEAR as shown in below screenshot

In Appium, Desired Capabilities are a SET of keys and values sent to the MAIN Appium Server to relay as to what kind of AUTOMATION should be STARTED. There are various capabilities that are used to modify the BEHAVIOR of the server accordingly during the automation process.

The most DIFFICULT scenario to test on APPIUM is an ENVIRONMENT with data EXCHANGE as it requires testing of varied modules with different device testing, making the process very complex

Below is a list of System Requirements for RUNNING Appium

• Intel® i5 or i7 processor.
• 1 GB free hard disk space.
• 8 GB RAM
• 1 AVAILABLE USB 2.0 port and USB cable.

• Microsoft Windows XP SP2 (32 bit), Vista (32/64 bit), Windows 7 (32/64 bit), Windows 8 or above.
• Net Framework 3.5 or above

• OS X VERSION 10.7 or higher.
• XCode and Command-Line Developer(CLD) Tools

The following are the basic prerequisites for RUNNING Appium.

• You should have a Windows or Mac OS
• Install Java JDK version 7 and above
• Install Android SDK version 22 and above ( inbuilt with android studio )
• Setup Appium COMMAND SERVER setup/ download and install Appium GUI .exe file
• Install Google USB Driver latest
  Install IDE -eclipse/Intelligent/android studio

Challenges faced while QUALITY TESTING may vary from APPLICATION to application, but, these 8 challenges are the most common obstacles faced:

• Optimizing with User Experience & App Performance both in mind
• Touch screens make the process more intricate and complex
• Context Awareness and its limitation to functionalities
• Short Timeline
• Lack of Access to Multiple Devices
• Variations of MOBILE Interfaces
• Device-Based Quality Testing
• Security Concerns

Appium is written in Node.js which is basically a client-server architecture served as an HTTP server built to create and HANDLE multiple WebDriver SESSIONS. This testing tool starts as a “ Test Case” on the device which then spawns a server and LISTENS to any proxy commands from the main server of Appium.

Once the Appium server receives a connection with details from the client in the form of a JSON object over HTTP, it CREATES a session as specified in JSON, and then returns the session ID, which is to be MAINTAINED until the main Appium server is running. Thus, all the quality testing will be performed in this newly created session. Following is a diagram depicting the Appium architecture clearly:

There are 10 DIFFERENT types of functional/unit TESTING. They are:

• Functional Testing
• Usability Testing
• Compatibility Testing
• Performance and LOAD Testing
• Installation Testing
• Security Testing
• Mobile-oriented Testing
• Automated Testing
• Manual Testing
• Localization Testing

Appium is an open-source Quality Testing Automation tool used for testing various MOBILE applications. It ALLOWS QA ANALYSTS to test different types of mobile applications (like Native, Cross-Platform and Web Apps) using the standard WebDriver library. Through Appium, automated TESTS can be run on actual devices like TABLETS, mobile phones, etc