API is the acronym for Application Programming Interface. It is used as a communication medium between two different applications. APIs are also used over web networks, known as “web services”. With the new technology endorsement, this feature has become the keystone of programming. For application development, writing APIs to correspond with different databases or other modules is a familiar methodology now. So being a tester, you must test the APIs for maximum test coverage.
API testing is mainly focused on the application or software to send API calls, receive them and process the response from the user. API automation testing is about examining multiple functionalities then changing the parameters of API calls via a hit and trial method. This cycle of programming makes the functionalities perform better and expose the flaws. There are 3 steps of API automation testing which are written below:
GUI TESTING
The user will give input to the application in the required space and this phrase can be called as “Presentation Layer”.
API TESTING
In this stage the given data is processed according to the setup program; this phrase can be called as “Logic Layer”.
DATABASE
The last stage shows or saves the result of the progress which is examined by the program; this stage is also known as “Database Layer”.
How can an API be examined through automation?
Once input is given to the application, it will investigate the given data according to the programmed algorithm until a result is concluded by the program. Mostly there are 3 possible outputs of the results: a Pass or Fail status, data or information and a call to another API.
However, there is a possibility of having no result when something unpredictable happens. If this issue occurs, then the case would be a bit complicated for the development process but as APIs are the centralized body of data for many applications, data-driven testing for APIs is beneficial to speed-up test coverage and accuracy.
API Automation
Sometimes we need to automate the test cases which are executed over and over, like the hit and trial method. Most times, the API testing needs to be executed repeatedly and continuously. Resultantly, the feature of hit and trial is automated.
One of the immense benefits of automated testing is that it can be repeated without any interruption with minimal effort and maximal accuracy. Some benefits are discussed below:
Rapid Operations
Automated testing of API is the source of relief for validation during the different phases of development. It increases the speed of communication among coders, designers, and product owners and also it increases to rectify the faults. Automation multiplies the productivity of the tester team to maximum.
Minimum Costs
The initial cost may be higher for using automated API but with the passing usage time, it reimburses the invested cost by saving dollars with each test. This also gives a higher quality of work, thereby decreasing the total time of the project which results in low cost.
Quick Identification of Glitches
The defects in the programming of the application becomes easier to detect as compared to the conventional way (manual tests) for the testing teams. This helps increase the overall progress of the development process. The earlier a glitch is rectified, the more cost-effective it is to fix it.
Productive
Automation of API tests help to reduce the testing time, as it repeats the procedure speedily and automatically which helps the team to perfect the flaws in the application and make it ready as soon as possible. Otherwise, the conventional procedure makes the processing slower.
Improvement in Fewer Seconds
If someone runs the hit and trial method manually, it will take a prominent time but if this is done via automation, then definitely it will cut a huge amount of time for better things. It makes the testing team work easily and efficiently to improve the quality of the application.
Fast
API automation implements the API testing in an efficient manner which allows the repeated tests to run over and over, resulting in the timely delivery with accuracy of the results.
Thorough
Testers tend to have distinct testing strategies and their concentration on the areas vary depending on their expertise. Due to the touch of automation, there is a surety of covering all areas for the testing. Therefore, it is the best possible way to assure the quality of the tests.
Security of Data
The capability of testing will be majorly dependent on the amount of the test data you input. Conventional way makes a good amount of test data more time, and an output, testing is usually performed in intervals. Automation can help with creating, editing and protecting the input data. The time and cost savings in this area are potentially huge.
Reuse of Automated Tests
Due to the repetitive nature of automation test cases, the developers have the opportunity to examine the output of the case any time. Automated test cases can be reused in different strategies to examine different outputs.
API Automation Tool
For the effective and quick API testing, you can’t rely on the manual testing tools. API testing is one of those areas where automated testing works well and is highly recommended in order to match and stay ahead in the world of agile development, DevOps, and continuous delivery cycles. That is why we need to opt for some effective API test tools to test the APIs as it allows you to test in tandem with the development.
There are a number of options available as automation tools for the developers in the market ranging from open source to commercial solutions according to the specific needs of the testing teams.
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