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Uncover Memory Leaks by Mobile Apps

 

Mobile apps can often crash for many reasons. Nothing is as excruciating as memory leaks. It starts with your app crashing often, or becoming slow or maybe making your entire phone slow down, taking longer time to load activities. Memory leaks are notoriously hard to detect, and thus can easily surprise you. Have we ever thought why most of the users uninstall the application after some use?

Which is why it is critical for Developers to understand the memory consumption by any mobile application. How do you detect memory leaks during Mobile Application Testing? And if so, how can you prevent them from hogging mobile resource consumption?

A little knack for Mobile Application Testing always comes handy.

 

mobile application testing
Figure 1: Image Credit- GadgetHacks

 

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Memory is critical to device

 

Memory is one of the key resources of the mobile device.And memory leaks in Android is an important thing to be kept in mind. Java is a garbage collecting language, which removes the need for developers to dig deep to manage allocated memory. This reduces the chances of any segmentation fault crashing an app or any unfreed memory allocation from eating up space of the heap area, thus creating a safer code.

 

However, a garbage collector is never an insurance against memory leaks. There are other ways by which memory can be leaked within Java. This means that your android mobile application is still pretty prone to wasting unnecessary memory allocation and crashing with out-of-memory (OOM) errors.

 

Toptal
Figure 1: Image Credit- Toptal

 

Why are Memory Leaks Bad?

 

Cause: Memory leaks occur when some variable of the application still has references to some objects that are unnecessary, no longer in use or used to be with the app anymore, is bloating the allocated memory heap and the Garbage Collector is not being able to release that memory.

Effect: Android devices mostly run on phones with limited memory, so as a result of too many leaks, the app runs out of available memory. This triggers more frequent Garbage Collector events which paralyze the device (Stop-the-world GC events) by almost stopping the rendering of UI and processing of events. This leads to an Out of Memory Exception and translates to the user as the app being unresponsive.

 

Android App Testing

 

Testing for Memory Leaks

 

Memory Leaks are caused by the failure to not be able to de-allocate memory that is no longer in use, which is why they cannot be identified during black box testing. The best phase to find the memory leaks is when developers are developing the application, at a code level.

It’s best to check for memory leaks during unit testing. However, testers can follow these tips:

 

Release Unused Memory: Memory leaks can be present because of the bad design of the application and thus might consume lot of memory when the application is in use

 

Test on Multiple devices:The memory consumption by the application should be monitored while doing the system & functional testing. One shouldn’t rely on a single device testing as there are plethora of devices in the market.

 

Detecting Memory Leaks

There are quite a few techniques and tools devised by developers to pin point memory leaks. Android’s very own Android Studio has a powerful tool to monitor not only memory usage but also for network, GPU and CPU usage as well, called the Android Monitor.

Memory Monitor in this helps track memory usage, find de-allocated objects, identify memory leaks and helps get an overall sense of how your app allocates and frees memory. It’s done in three steps:

1. During and use and debugging of app, track the memory monitor. If the memory usage graph rises for your app and doesn’t fall even if put in background, it’s a memory leak.

2. Using the Allocation tracker, you can check the percentage of memory allocated to different types of variables in your app. This gives you a sense of how much memory is consumed by which object.

3. Create a Java Heap Option to create a heap dump that keeps a snapshot of the memory at any given point of time, thus providing the data consumption data.

Despite Android’s monitor to detect memory leaks, there are a few platforms from developers that help extract memory consumption data without so many steps for faster testing cycles.

pCloudy’s very own platform for example, generates the statistics for Memory consumption while doing the normal functional Mobile Application Testing on real mobile devices.It also generates other vital data such as CPU consumption, battery consumption & data consumption for testers and developers who reiterate several test cycles across multiple physical devices.

 

mobile application testing
Figure 1: Image Credit- Android Developers Studio

Want to test your Mobile App?

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pCloudy 4.3

 

  • User can directly send input to the pCloudy Android devices by using their system keyboard.
  • CPU and Memory graphs on iOS.
  • New Improved Automator Page.
  • Automator now works on devices for all region
  • Live view for the Automation run for devices from all region
  • Bug Fix: Remaining Credits now revert back after an Appium session finishes earlier than booking expiration time.

Click Here to check our Previous Release.

How to create a world class Mobile Testing Lab?

 

It can be a big challenge to build a large scale Mobile Testing Lab from scratch. Look around you and you will see that with every single day, companies in adding mobile apps in their business strategy and with it the mobile app dev and testing market is becoming increasingly competitive, dynamic and fast paced. Older testing methods are becoming obsolete and the utter multiplicity of mobile platforms, devices and networks have made it important for any company to choose the right solution (Mobile Testing Lab) in order to strengthen themselves in the market.

While creating a testing program for these mobile applications can seem like a relentless chore and a massive undertaking, it doesn’t really have to be. Here are a few considerations to choose the right lab strategy for testing your mobile apps.

 

Key Considerations:

 

• Compatibility of Device OS, Screens and OEMs: The sheer number of different device variants, OS versions and screen resolutions form a large set of factors even though each of them are significant in their own rights. In 2012 there were about 4,000 Android device models on sale. 2015 saw about 24,093 distinct Android devices. Question is, can the lab I choose, cover maximum number of devices and come close to 100 percent of my end users’ device base?

 

mobile labs

 

• Device Control Infrastructure: After you select your target devices, it is also key to look at the other parts of a reliable architecture of your hardware. Regardless of the technology to be used in building the device lab, one needs servers to control and take care of managing devices and execute tests. Moreover, it is crucial for these servers to collect, process and store results of the tests seamlessly and without interruption.

 

mobile testing lab

 

A snapshot of Infrastructure needed to create a Mobile Device Lab

 

mobile testing lab

 

Facebook Device Lab Infrastructure

 

Click Here to know about pCloudy Device Cloud Infrastructure

 

• Wi-Fi Infrastructure: This is another very crucial area that is often ignored when creating large-scale test lab. As the number of device in a WiFi network adds up, so do problems when all these devices transferring data at the same time. Most WiFi access points are not designed for this kind of bandwidth and you are bound to see different types of timeouts on server responses.

 

• Importance of Automated Testing: The very obvious benefit of automation of testing of mobile devices on the cloud is that through this one can carry out tests on a wider range of OS and devices in a much shorter time and with lesser life-cycle management investment. This not only significantly reduce QA spending, it also expands coverage and speeds up the resolution of issues. You can use a single script and apply the same on different devices and operating systems.

 

Integration with CI/CD pipeline:

 

Today, almost all organizations have mobile apps and for some, the mobile app is their only way of interacting with customers. With this increasing emphasis on mobile, the pressure to routinely update mobile apps means embracing Continuous Integration (CI) and Continuous Delivery (CD) methodologies. Any Mobile Labs has to support the CI/CD process.

 

5 Tips to build a successful lab:

 

1. Using Real Devices
2. Tackling Multiple Devices
3. Using a Secure Mobile Device Testing Cloud
4. Automation Strategy
5. Increase Lab efficiency by integrating with your existing tool ecosystem

 

1. Using Real Devices: Some Devs/testers are using emulation technology for compatibility testing. However, it has been proven beyond doubt that testing on emulators is often not reliable. Real devices help you and your team to find real bugs in your App before customers do. It is only way to have a confident App release and increase the chances of success of your test lab.

 

2. Tackling Multiple Devices: With thousands of different devices, it can be a bit overwhelming when building a mobile testing lab that encompasses the coverage of testing in all of them. Luckily, the major mobile operating systems use logical screen sizes which are mapped to physical screen, hence, the representative devices will get the necessary coverage. The test strategy is not to test absolutely everything, but to test the crucial elements that are most represented in the popular devices in the market, and add or subtract devices as they come in and out.

 

3. Using a Secure Mobile Device Testing Cloud: Using a secure cloud is vital to enterprises, especially if they aren’t located under the same roof. Testing real devices for everything can become really costly and time consuming. Using a testing cloud keeps your budget in check, reduced project cost and thus helps achieve high return on investment. Be it public cloud for small businesses, or large enterprise projects that demand a private cloud infrastructure, high performance and security are essentials to have complete control over the cloud.

 

4. Automation Strategy: Creating Regression Automation suites once Application is ready is a passé. Agile methodology and CI/CD process demands automation creation in parallel to development. Automation strategy should be built keeping above aspect in mind.

 

Here is a depiction of what the automation process should look like.

 

Mobile Labs

 

As part of Automation Strategy, Mobile Testing Lab should provide the capability to allow automation run on multiple devices in parallel.

 

5. Increase Lab efficiency by integrating with your existing tool ecosystem: A lab is as good as how well can it be integrated within existing ecosystem. Can it integrate with your Test Management system or can it log bugs automatically after a failure? Can it integrate with your build management tool for CI process? Here is a depiction of how “Test Tools” fit in the larger ecosystem.

 

Mobile Testing Lab

 

Conclusion: A well thought strategy for setting up of Mobile Testing Lab is a necessity for every organization undertaking Mobility projects. In current times, organizations have plethora of choice related to setting up of Mobile Testing Lab. They can choose to setup an In-house lab or use a private-hosted service or use a cost effective Public Cloud lab.

 

Would you like to know more about Lab options with pCloudy? Click Here

Are you Ready for the Challenge?

The pCloudy Mobile App Hackathon is a programming-focused Coding contest designed to inspire a creative and dynamic generation of tech professionals to put their skills to the test. For three weeks, top developers will compete for the chance to win prizes and job interview opportunities in a skill-based challenge. Think you got what it takes?

Code Challenge

pCloudy

mobile app hackathon mobile-app-testing-platform
The pCloudy Mobile App Hackathon Your Simplest Mobile App Testing Platform
register mobile-app-testing-platform

prizes

Continuous Testing – Webinar

 
pCloudy in partnership with TechGig is bringing in a series of Webinars.
Here is a webinar on

Continuous Testing

for Mobile Apps on Real Devices by Avinash Tiwari, Co-founder Smart Software Testing Solutions.

Continuous Testing Webinar by Avinash Tiwari

To view Webinar Video directly Click Here

Eclipse IDE

 

An Overview

pCloudy provides a plugin for Eclipse IDE. Using the plugin you can perform both manual and automation testing of mobile apps. The plugin provides a user interface to connect to the pCloudy platform. You can upload apps, book devices and perform your testing right from your IDE.

 

For Manual Testing

Upload your app to the cloud drive, select the device, and perform the manual testing of your app right from Eclipse.

 

For Automation Testing

This plugin helps you get a pseudo code for your Test Scripts to run on multiple pCloudy Real Devices in Parallel. Just install the plugin, login to pCloudy.com, upload your app, select devices and get the pseudo code.

 

Prerequisites

  • You have an account over pCloudy with enough credits.
  • Latest web browsers on local machine
  • Latest version of Eclipse
  • Eclipse pCloudy plugin

Preparation

  • Reference the JAR files to Eclipse
  • Make a note the API Username and API Access Key

Steps to be followed

Launch Eclipse > go to Help menu of Eclipse > click Install New Software > Copy and paste the below Eclipse plugin address in Work with textbox.
http://eclipseplugin.pcloudy.s3-website-us-east-1.amazonaws.com/

  • Click on Add, a new pop up window of Add Repository will open
  • Enter Name and Location, click on OK
  • Check pCloudy checkbox and then click on Next

Available Software

Now, you need to install pCloudy Eclipse Connector. Click on Next to begin pCloudy Eclipse Connector installation.
pCloudy-Eclipse-Connector

Further, check I accept the terms of the license agreements checkbox and click on Finish.
review-licensed

Installation of pCloudy Eclipse Connector begins.
installing-software

On completion of pCloudy Eclipse Connector installation successfully, an alert message appears. Click on OK to proceed pCloudy plugin.
pcloudy-plugin

Now, enter Cloud URL of pCloudy along with registered Username and Access Key over pCloudy to login successfully. Click on Apply and then OK.
preferences

Now, you are able to perform Automation/Manual testing of apps based on Appium TestScripts/pCloudy/OpKey or Test as per your requirement.
 

Automation Testing of App

To perform automation testing of your app, here’s a checklist you need to prepare for Automation
Here, we are discussing about Test Automation of apps by over pCloudy.
Select Automation & pCloudy and then upload your app to be tested.
Click on Next to proceed.
upload-app

Select duration and filter list of devices by using given filter parameters (Android/iOS, Manufacturer, and Version). Select desired device (Ex. Samsung) and click on Next.
select-devices

Finally, you get pseudo code for performing Test Automation. You can copy it to clipboard or copy it manually by selecting entire pseudo code.
connect-device

You will need the pCloudy java connector jar file for the above code to work. The pCloudy-java-conector.jar contains the API wrappers, classes & methods to use the pCloudy RestfulAPIs(without knowing how to call rest webservices from java). The gson.jar is a well known, opensource google library. You should add the pCloudy-java-connector.jar in its build path as a reference within your java project containing appium scripts. See this link to learn how to add reference in eclipse.
You can download pCloudy-java-connector.jar & gson.jar(a dependancy of the pCloudy-java-connector.jar)

 

Manual Testing of App

If you want to perform Manual Testing of apps over pCloudy through Eclipse then select Manual way and pCloudy and upload app to be tested. Click on Next to proceed.
upload-app-manual

Select duration and filter list of devices by using given filter parameters (Android/iOS, Manufacturer, and Version). Select desired device (Ex. Samsung) and click on Next.
select-devices-automation

Now, you are recommended to open pCloudy in browser. Click on Open in browser and then on Finish.
open-in-browser

When you click on Finish, pCloudy login page opens in eclipse. Now, you can login and perform manual testing on selected device as well
login-to-start-testing

Testing Mobile Apps

 

If you are someone using a smartphone to get through most of your day, then I’m sure would you’ve experienced it – You are in an elevator using your smartphone trying to find a restaurant for dinner but the app you are using unexpectedly crashes, or you are in a crowded subway using your smartphone to upload a video to some social media portal but the app you are using takes too long to respond, or you are just waiting for a friend in the basement of a parking lot and in the meanwhile you decide to shop for some new shoes but the e-commerce app you are using does not respond the way it should. Isn’t it frustrating when the apps you are using does not work when you require it the most? In these situations, the first thing you do is simply uninstall it, or in the worst case write a bad review.

Strangely, though most of the apps are functional and performance tested, they are still found to be defective by the users. It could be possible that not all scenarios are covered during testing. So, where is the gap? Deeper investigations have revealed that mobile apps behave differently in different network environments. In the above scenarios particularly, it seems like there is more evidence indicating that these issues are caused due to irregular mobile networks in locations such as the Elevator, or the crowded Subway, or the basement of a parking lot.

 

Why do apps behave differently in different network environments?

The network has a huge impact on the behaviour of your apps. Most of the apps that we use today are functioning by constantly communicating and fetching information from some servers or users that are miles away. The communication that happens is on wireless networks that are unfortunately not always reliable or consistent. Though most MNOs have established wider and better networks, it is practically difficult to achieve absolute seamless connectivity with excellent signal stability using existing wireless technologies. This is because, inherently, wireless networks have several inconsistencies like the lack of bandwidth in some places, the drop in packets caused by handovers and routing while moving, and more interference from other networks. Additionally, the networks through which data is transferred wirelessly also vary based on the technology used like GPRS, UMTS, HSDPA, LTE etc.

 

Why should apps be tested in different network environments?

The unpredictability of wireless networks has a huge impact on the functionality, performance and user-experience of an app. This is why we often see certain functional defects, performance defects, and sometimes crashes only when the app is running on a certain network or in some specific locations. Besides, mobile apps are expected to function on everything from an excellent Wifi connection, to a snail-paced 2.5G connection. Hence mobile apps have to undergo a wide range of tests on different networks with a variety of conditions before they are released to the users.

 

Are you testing your apps on different network conditions?

Traditionally, mobile apps are tested using the best networks in perfect conditions. But in real environments when the apps are being used anything can go wrong – the network bandwidth might not be enough, the latency might be high, data losses might occur, or there might be interference from other networks. App development companies have now realised the impact a network can have on their apps and are slowly filling up the gaps in mobile app testing. They are now focused on ensuring the app’s functional stability and relentless performance despite network inconsistencies. But testing mobile apps on different varieties of networks with a range of uncommon conditions is overwhelming and challenging. Moreover, these apps have to be tested on numerous mobile devices. It’s a tedious but crucial task. Additionally, tools that support such testing are scarce.

 

How can you test your apps in different network environments?

  1. Testing Mobile Apps using live networks – Live networks can be used for testing mobile apps. The apps can be installed on real devices and can be tested on various networks like GPRS, UMTS, LTE, CDMA, etc. But the procedure of using real networks for app testing is slow, cumbersome, and mostly provides inaccurate results. Testers need to travel to different locations or wait for the network conditions to occur for conducting the tests. Furthermore, when the developers try to reproduce the bugs in order to fix it, the exact network conditions are hard to be replicated; eventually, most of the bugs will be closed as “Cannot Reproduce” while the bug still remains.
  2. Simulated networks – Network related tests for mobile apps need not be such a hassle if the testers are given full control of the network being used. Using a simulated lab network, testers can easily test their mobile apps by simply selecting and applying the type of network profile to be used. They can also create and customize different network profiles by simply changing parameters like Uplink Bandwidth, Downlink Bandwidth, Latency, Loss Percentage, Packets Corruption, etc. This setup helps testers to replicate a myriad of network conditions for testing mobile apps.
    On a larger view, when a mobile device cloud like pCloudy is being used you can test your mobile apps on varieties of networks, on hundreds of real mobile devices in parallel, through manual tests or automation runs. It is one platform that takes care of your entire app testing needs by helping app developers to easily test and experience the app functionality and performance on different networks and different mobile devices.

Introduction to iOS TestFlight

TestFlight is an online service used to distribute and test beta iOS applications. Developers can use Test Flight to evade the Apple’s bitter binding procedure for testing new versions of their apps. It provides over-the-air installation, testing, tracking and managing of Beta apps. In simple words, TestFlight acts as a link between the developer, the tester, and the Apple Developer Center.

How is it useful?

  • Distribution of the app over-the- air to Testers
  • Tracking and managing testing using TestFlight’s dashboard
  • Receiving feedback from testers to improve the app
  • To obtain reports about the device models, OS version used while testing the App
  • Automatically records any crashes the testers encounter and sends it to the Developer

This tutorial will walk you through integrating TestFlight into your own apps.

What do you need to start?

You have to have your certificates, app ID, and provisioning profiles in place before distributing your apps using Test Flight. Here’s the list of items you need:

  • A Developer ID to login to your developer account.
  • A Certificate for Distribution to export builds and distribute apps
  • An App ID
  • A Device UDID
  • Ad Hoc Provisioning Profile to distribute your app on testers devices
  • Sign your app with a valid ad hoc provisioning profile

These items will help you obtain an .ipa file that can be distributed for testing in iOS devices with UDIDs mentioned in the provisioning profile of the app.

Uploading your app for Beta Testing

Open up your project in Xcode, make sure you have a correct Bundle Identifier and that you’ve chosen the correct Distribution Certificate:

Choose Product\Archive from the top toolbar:

Once Xcode finishes archiving your project, click the shiny blue Submit to App Store… button:

Choose your development team

Hit Submit

Wait for your build to upload. Once done you will receive a “Submission Successful message”

Inviting Testers