What is API testing for beginners?

API (application programming interface) testing is a kind of programming testing that performs check
straightforwardly at the API level. It is a piece of mix testing that decides if the APIs meet the analyzers'
desires for usefulness, dependability, execution, and security. Not at all like UI testing, API testing is performed
at the message layer without GUI. 

There are two expansive classes of web administration for Web Api testing automation: SOAP and REST.
Cleanser (Simple Object Access Protocol) is a standard convention characterized by the W3C principles for
sending and accepting web administration solicitations and reactions. REST (Representational State Transfer)
is the web gauges based design that utilisations HTTP. Dissimilar to SOAP-based Web administrations, there
is no official standard for RESTful Web APIs.

1. Comprehend API prerequisites 

Prior to testing your APIs, you have to respond to these inquiries to altogether comprehend the API's
prerequisites: 

What is the API's motivation? 

Knowing the motivation behind the API will set a firm establishment for you to well set up your test information
for information and yield. This progression additionally encourages you to characterize the check approach.
For instance, for some APIs, you will confirm the reactions against the database; and for some others, it is
smarter to check the reactions against different APIs.

2. Indicate the API yield status 

The most widely recognized API yield you have to check-in API testing is the reaction status code. 

Checking if the reaction code equivalents to 200 or not to choose whether an API testing is passed or fizzled
is well-known to new API analyzers. This is certifiably not an off-base check. Be that as it may, it doesn't mirror
all test situations of the API. 

3. Concentrate on little practical APIs 

In a testing venture, there is in every case some APIs that are straightforward with just a couple of sources of
info, for example, login API, get token API, wellbeing check API, and so forth. Be that as it may, these APIs are
important and are considered as the "entryway" to enter further APIs. Concentrating on these APIs before the
others will guarantee that the API servers, condition, and validation work appropriately.

4. Pick a reasonable robotization apparatus 

A further advance to use the computerization capacity of API testing is picking the most reasonable apparatus
or a lot of appropriate devices from several alternatives in the market. 

5. Pick reasonable confirmation strategies 

While the reaction status code tells the status of the solicitation, the reaction body content is the thing that an

API comes back with the given info. An API reaction content changes from information types to sizes. The
reactions can be in plain content, a JSON information structure, an XML record, and that's only the tip of the
iceberg. They can be a straightforward few-word string (even unfilled), or a hundred-page JSON/XML record.
Subsequently, it is fundamental to pick a reasonable confirmation strategy for a given API.