API testing focuses on the business logic layer of the software architecture. The goal of API is to have an integration of the application with other services.
During API Testing our QA team perform test cases in terms, that API should be easy to use by other software, secure and of course bugs free.
When we provide API Testing Services, we check different combinations of positive and negative scenarios. It allows you to be confident that your API doesn't have bugs, and the whole application works as expected.
Our offerings include Automated and Manual API testing services.
Benefits of API Testing
Access to the application without UI
Protection against malicious code and hacking
Time efficiency
Reduces the cost of testing
Independent technology
Fast test execution
API Testing Types we provide
When we provide API testing services, we allocate QA engineers who have extensive experience in using API testing tools. It allows you to reduce the time and cost of the testing cycle and increases the performance of the tests:
Functional Testing - checking the overall health of the API.
Security Testing - checking the type of authentication and data encryption using HTTPS protocol.
Regression Testing - checking how API works after bug fixing and new features development.
Automation Testing - developing API tests to run them regularly.
Load Testing - checking how much load your API can support.
Negative Testing - checking how API worked when invalid data provided.
Documentation Testing - checking the completeness of the guidelines of API calls.
Our API testing methodology consists of
API specification review
Analyzing requirements
Test documentation development
Test framework development
Integration test suite with CI/CD server
Test execution & reporting
How we work when provide API Testing Services
1.
Define tech stack that suites to the current project
2.
Create test cases for all possible combinations to ensure that we complete full test-coverage of API.
3.
Group test cases into categories
4.
Declare all functions of tests
5.
Make tests independent
6.
Specify test data in the entity and not in tests themselves
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Types of defects that can be found during API Testing
Failed to handle invalid conditions
Unused flags
Lack of functionality
API connection difficulties
Security issues
Multithreading Issues
False errors
Incorrect data structuring
Frameworks, Tools and Solutions
JMeter
Postman
SoapUI
Rest-Assured
Supertest
Popular Questions
When API testing should start?
It depends on which API testing you need to perform. A lot of applications used the so-called “internal” API to communicate between different parts of the application. We strongly feel that these API endpoints should be tested at priority instead of working on UI testing. The reason for that is that it is a core of the system, and it should work as designed.
Should we do manual or automation API testing?
From our point of view automation API testing is a must. Here are several points:
API automation tests do not depend on UI and are much stable comparison to UI tests
API automation tests development is much faster than UI automation
API automation test runs are blazing fast
API automation tests could be run even after each commit to indicate that API works with no issues
Can we integrate API tests to CI/CD tool?
We think that this is a must. Even if you have postman tests that should be done. It will give you the following benefits:
More visibility of test results for the team
Tests are running without human involvement
Continuous delivery process
Automation testing for each commit
Quick indication of the issue
We would like to order your API testing services, but we do not want to share codebase of our application. Is it possible?
Sure thing. For developing API tests, we do not need access to your codebase. Our API tests could live in a separate repository.
We are using the BDD approach on the project. Can you develop API automation tests in BDD style?
Of course, we can use Cucumber, Behat, Aloe, JBehave, and others.
What tools are you using for manual API Testing?
We prefer to use Postman as a tool for manual API testing due to the following reasons:
Easy to use
Could be integrated with CI/CD tool
Ability to storing test data through different environments
Ability to use variables
