API TESTING IN POSTMAN

1. Look for the request name for example GET, click to expand it.
2. Box 1 shows Parameters which contains the variables that needs to be send along the request.
3. Click the TRY IT OUT button at the place of box 2.
4. Select the desired parameter and click EXECUTE.
5. You will see a section called REQUEST URL. That is the URL which we will be using to interact with the API in the examples.

URL is the API endpoints which we will be using to send request in Postman. Without having these endpoints, we cannot interact with the API. Developers use Swagger to document the list of all endpoints in their application.
Throughout this article, these are the endpoints you will be using :

GET: https://petstore.swagger.io/v2/pet/findByStatus?status=available
POST: https://petstore.swagger.io/v2/pet/petId
PUT: https://petstore.swagger.io/v2/pet
DELETE: https://petstore.swagger.io/v2/pet/01

1. At Box 1, click on + NEW COLLECTION.
2. Fill in a suitable collection NAME.
3. Fill in a brief DESCRIPTION that reflects the purpose of the collection
4. Fill up the Authorisation, Pre-request Scripts, Tests, and Variables if applicable.
5. Click Create to complete the step.

collection is like a project folder that we all create at the beginning of any project to store all files in it.
Authorisation tab allows you to store access token that’s usually required to interact with an API. However in this example, it is not required.
Pre-request Scripts allows you to write and execute any scripts that you may need to pass along with your url.
Test allows you to check the response status after performing an API request. It also allows you to execute any scripts that you might want to do after receiving the response from the server side API.
VariableS tab is the place where you might want to declare any variables especially global variable.

1. At the top panel, click on the + icon.
2. At box 1, click on the dropdown and select GET method.
3. Copy and paste GET /pet/findByStatus url from Swagger Petstore into the address bar.
4. Hit Send button and wait until you receive the response.
5. Click Save, and save into the collection we created earlier.

Get request is to retrieve all the list of pets that are available in the pet store.
Params, in box 2, is autofilled where its key value pair is set upon copy pasting the url in address bar, which in this example is status = available. In real testing scenario, you can set and loop through any parameters you want to query by storing the variables in VARIABLES tab as mentioned in creating collection above.
RESPONSE STATUS, in box 3, you will see 3 indicators. Status 200 OK means the GET request sent was a success, Time 6.05s was taken to complete the request and size 54.42 KB which indicates the size of the requested data.
RESPONSE BODY, in box 3, contains the response data . This data is usually formatted in JSON or XML format.

1. At the top panel, click on the + icon.
2. Set the HTTP method to POST.
3. Copy and paste the POST /store/order url from Swagger Petstore into the address bar section.
4. Under the same POST /store/order, copy the entire body section.
5. In Postman open the body tab as in Box 2, switch the radio button from none to raw, and paste it into the body section.
6. In Box 4, set the dropdown to JSON.
7. Hit the Send button.
8. Save the file into the collection file.

1. At the top panel, click on the + icon.
2. Set the HTTP method to PUT.
3. Copy and paste PUT /pet url into the address bar.
4. Copy the body section and paste it into the Postman body tab as per Box 5.
5. Modify the dog’s name to any name.
6. Hit Send button.

1. At the top panel, click on the + icon.
2. Set the HTTP method to DELETE.
3. In the previous PUT request example, you would have received an id 1543500600xxxx as part of the return value. This will be your petId. Refer to Box 8 of PUT request example.
4. Copy and paste DELETE /pet/{petId} url into the address bar.
5. Replace the petId with the id in step 3.
6. Hit Send button.