Automated Testing Vs Manual Testing: Pros and Cons

Automated Testing & Manual Testing Define by App developer Lithuania

Published November 27,2018 10 months ago Posted By Justinas Danis

Reading Time: 6 minutes

In today’s digital era when our day-to-day activities depend on several technological attributes, their quality assurance is a prime concern. Here comes the need of bug-free software and apps and a thorough software testing. It hardly matters, which sector you opt for, but presently the majority of industry sectors adopted various application, including mobile technology.

When you start testing, one main decision you need to make is, if doing it manually or take the automated mode. Though, neither of the options are better or worse; size, cost and time of a project will definitely determine, which method would meet the project requirements. Testing helps in speed improvement and in the elimination of bugs. Therefore, mobile app testing is a must in app making.

Automated Testing

This happens to be a critical element of a Test Driven Development and this relies on an already written script which automatically runs and helps in a comparison between the expected results and what actually resulted. This helps you to determine if the mobile app is working as per expectations.

Types of Automated Testing

They are different types, falling under four categories:

Regression Testing

A crucial stage for any product and quite useful for the developers in being able to identify product stability with changes in requirements.

Functional Testing

This is carried out to test every function of a mobile app and verify with respect to the listed requirements. This is done by comparing the inputs and outputs of the actual and the expected results.

Unit Testing

This allows you to find bugs during coding. No matter what you develop, unit testing is needed, be it making a web or a mobile application. It’s totally on the development team, to whether to use it or not.

GUI Testing

This kind of testing is done to test an application’s graphics UI and includes, running tests on screen’s components like icons, menus, toolbar, dialog boxes and more.

Automated Testing:  Pros and Cons

Pros:

  • helps in finding more bugs in comparison to manual testing
  • since most of it is automated, this is speedy and an efficient method
  • this can be recorded which helps in reuse and execution of the same type of testing operations
  • works on software, so less tiring and lessen fatigue
  • productivity increases owing to fast and error-free testing
  • covers broad areas as automation testing software does not skip any smaller unit

Cons:

  • In absence of a human element, it becomes tough to perceive visual aspects of the User Interface like font, size, color, contrast or button sizes.
  • They could be the most expensive and also increase the project cost.
  • The worse thing is that they are yet not full proof. With their own limitations, every automation tool reduces their scope.
  • Another major issue is to debug the test script which makes test maintenance very costly.

 

Why you need Automated Testing

For the below-mentioned scenarios, automation in testing is needed:

To do away with human error

With powerful, pre-written powerful scripts and tools, to miss an issue or a bug is lower. Hence automated testing is time-saving and reliable too.

To perform better GUI testing

With its ability to record while, testing the differences on diverse platforms, this also enables advanced GUI testing to detect regressions issues and errors.

Handle repetitive work

They can better handle repetitive tasks and are time-saving and is useful when the purpose is to add some features or carry out the same operations repeatedly.

Manual Testing

Most popular mode of testing for various types of applications which includes, both web and mobile apps. During manual testing, you can visualize and feel the functionalities of the app and its implementations.

Manual testing is very essential for testing application UI like colors, icons, buttons, dialog boxes, fonts, and other visual elements. Manual testing is done in two ways, either with a simulator and or with direct use of a real device.

Types of Manual Testing

They are different types, falling under three categories:

UI Testing

This testing is carried out through a series of UI tests. The UI tests need validation from a specialist whose task is to check the states and properties of UI elements. And finally, the design elements are being matched with the final design of the app.

Ad-hoc Testing

This kind of testing is done without any prior test cases. This type of testing random and does not follow any pre-defined routine.

Exploratory Testing

A process of testing, where test design and test execution are all done simultaneously. In exploratory testing, the tester’s personal experience is taken into consideration.

Manual Testing:  Pros and Cons

Pros

  • Manual testing is lesser extensive and cost-effective.
  • Owing to human intervention, we get perfect UI feedback during testing.
  • The user doesn’t have to make changes to the entire coding, in order to make small quick fixes in the app.
  • There is an exact replication of user experience on the web and mobile apps.
  • This approach can handle tough use case situations better.

Cons

  • With the absence of recording; this process is less efficient.
  • Since done by a human, there are chances of more error.

Why you need Manual Testing?

For the below-mentioned scenarios, manual testing is needed:

Initial stage of development

Manual testing is highly efficient in the initial stages of application development as this helps to identify bottlenecks in-app and the resources are saved from being used.

Accuracy in UI

For the user interface, manual testing is quite helpful, as, during automated testing, the tests cannot detect the exact visual impact of fonts and colors for the UI of the app.

Besides, that there are some situations where automated tests cannot be done, like those related to hardware and where manual testing is mandatory for completion of the test process. Also, it is not practically possible to write scripts in automated testing for automated touchpad and sensors.

Here’s a brief comparison of each type, along with their pros and cons:

Parameter Automated Testing       Manual Testing
Reliability A reliable method, due to use of tools and script Not much accurate owing to human involvement
Batch Testing Several test scripts can be batched This cannot be batched
Engagement Done by tools; accurate and no fatigue Repetitive tests can be boring and error prone
Framework Use frameworks like Data Drive, Hybrid, Keyword to accelerate the process No use of frameworks but guidelines, checklists, strict processes to write down, certain test cases
Test Design Enforces Test Driven Development Design Does not enforce designs into coding process
Documentation Acts as document providing training value Provides no training value
Deadlines No risk of missing pre-decided test deadline Higher risk of missing the deadline
BVT This is useful in executing Build Verification Testing Difficult with manual testing
Set Up Requires lesser complex test set up.

Has a straightforward test setup

DevOps Helps in BVT and an integral part of DevOps Cycle Defeats automated build principles of DevOps
Parallel Execution Testing can be performed on various operating platforms simultaneously and reduces test time Can also be done in parallel but requires more human resource and this is a costly affair
When to Use? Suits for Performance Testing, Regression Testing, Load Testing or functional test cases which needs high repetition Suits Usability, Exploratory and Ad-hoc Testing

 

Conclusion

To summarize, manual testing requires human involvement, whereas in automated testing, code or test scripts are pre-written and the test is executed with tools. Manual testing provides better visual feedback, while automated testing helps in finding more bugs than in manual testing. Manual testing is prone to errors due to human involvement. Tools for automated testing can be expensive and as a result, increases project cost. In simple words, automated testing is faster and error-free, but expensive in comparison to manual testing.

Our app developers in Lithuania, would suggest you to choose an approach which suits your project best.

Hope you liked the article on app testing. Let us know your strategies of choice in the comment section below.