Api Testing Manual
Api testing is a type of software testing that involves testing application programming interfaces (APIs) and their functionality to ensure they meet expectations for performance, reliability, and security. API testing is a critical component of the software development process, as it helps to identify potential problems early in the development cycle and helps to ensure that the software meets its functional requirements. 1. Understand the API: The first step in API testing is to understand the API and its functionality. This includes understanding the data structures, input parameters, error codes, and output formats returned by the API. 2. Test the API: Once the API has been understood, the next step is to test it. This involves testing the various input parameters and validating the expected output. The tests should be designed to verify that the API is functioning as expected and that there are no unexpected behavior or errors. 3. Analyze the Results: Once the tests have been executed, the results should be analyzed to ensure that the API is functioning as expected. If any errors or unexpected behavior are discovered, they should be reported and addressed. 4. Document the Test Results: Finally, the test results should be documented and stored for future reference. This allows for easy review of the tests and results in the future, and helps to identify any potential issues that may arise in the future.
Understand principles behind Client-Server architecture
Client-server architecture is a distributed system where one or more “clients” make requests to one or more “servers” in order to access data or services. In this type of architecture, the client is responsible for requesting data or services from the server, while the server is responsible for providing them. The main principle behind client-server architecture is that the client and server are decoupled from each other, allowing them to be located on different networks or even different physical locations. This type of architecture ensures that clients can access data or services without having to be aware of the server’s location or how it is configured. Client-server architecture also allows for scalability and flexibility, as new clients and servers can be added or removed with minimal impact on the system. This makes it ideal for applications that need to support large numbers of users or clients, as the system can easily be scaled up or down to meet demand. Client Server Architecture also allows for better security, as the server can be configured to only allow specific clients to access specific services. This helps to ensure that only authorized clients can access the data or services, thus preventing unauthorized access.
Web Services types
1. SOAP (Simple Object Access Protocol): SOAP is an XML-based protocol used to send requests and responses between two applications. It is commonly used for web services that provide an interface to access data or services over the Internet. 2. REST (Representational State Transfer): REST is an architectural style for designing distributed systems. It is based on the HTTP protocol and uses a resource-oriented approach to access data. 3. JSON-RPC (JSON Remote Procedure Call): JSON-RPC is a lightweight protocol for remote procedure calls that uses JSON data structures for exchanging information. It is used for web services that provide an interface to access data over the Internet. 4. GraphQL (Graph Query Language): GraphQL is a query language for APIs that provides a more flexible way for clients to access and query data. It is used for web services that provide a more granular and efficient way to access data. 5. gRPC (gRPC Remote Procedure Call): gRPC is a high-performance, open-source, general-purpose remote procedure call (RPC) system used to connect services. It is used for web services that provide a faster and more efficient way to access data.
Restful Web Services
RESTful web services are based on the Representational State Transfer (REST) architectural style for designing distributed systems. RESTful web services use HTTP methods to make requests to a server, and the server responds with data in a structured format, usually JSON or XML. This type of web service is designed to be lightweight and simple, and it allows for the client and server to be decoupled from each other. RESTful web services are used for creating web applications that are accessible from any device or platform. They are also used for creating web services that are used to access data or services over the Internet. RESTful web services are becoming increasingly popular due to their simplicity and scalability, and they are being used by many companies to power their web applications and services. JSON and XML are the two most popular data formats used in RESTful web services. JSON is a lightweight data interchange format that is commonly used for web services that need to be accessed from different platforms or devices. XML is a more complex data format that is commonly used for web services that need to provide more granular and detailed data.
JSON
JSON (JavaScript Object Notation) is a lightweight data interchange format that is commonly used for web services that need to be accessed from different platforms or devices. It is a text-based format that is designed to be easy to read and write, and it is based on a subset of the JavaScript programming language. JSON is often used to exchange data between a server and a client, and it is becoming increasingly popular due to its simplicity and scalability. JSON is composed of two main components: objects and arrays. Objects are collections of key-value pairs that are used to store data, while arrays are ordered lists of values. Both objects and arrays can contain values of any type, including strings, numbers, booleans, and even other objects or arrays. JSON is commonly used for web services that need to be accessed from multiple platforms or devices. It is also used for web services that need to provide structured data in a format that is easy to read and write. Additionally, JSON is becoming more popular as a data exchange format due to its simplicity and scalability.
programing example
Python:
#Import json library
import json
#Create a JSON object
data = {
"name": "John Doe",
"age": 30
}
#Convert the object to a JSON string
json_string = json.dumps(data)
#Print the JSON string
print(json_string)
JavaScript:
//Create a JSON object
var data = {
"name": "John Doe",
"age": 30
};
//Convert the object to a JSON string
var json_string = JSON.stringify(data);
//Print the JSON string
console.log(json_string);
The output of this program is a JSON string that looks like this: “{“name”:”John Doe”,”age”:30}”
GET call using POSTMAN
In order to make a GET call using Postman, you will need to open Postman and select the GET request type. You will then need to enter the URL of the API endpoint you wish to access. This can be a full URL, such as “https://api.example.com/endpoint”, or it can be a relative URL, such as “/endpoint”. Once you have entered the URL, you can click the “Send” button to make the request. The response from the API will be displayed in the Postman window.
POST, PUT and DELETE call using POSTMAN
In order to make a POST, PUT or DELETE call using Postman, you will need to open Postman and select the appropriate request type. For a POST request, you will need to enter the URL of the API endpoint you wish to access and the data you wish to send in the body of the request. For a PUT request, you will need to enter the URL of the API endpoint you wish to access and the data you wish to send in the body of the request. For a DELETE request, you will need to enter the URL of the API endpoint you wish to access. Once you have entered the URL and any data you wish to send, you can click the “Send” button to make the request. The response from the API will be displayed in the Postman window.
API call using CURL
In order to make an API call using cURL, you will need to open a command-line interface and enter the following command: curl -X <HTTPMethod> <URL> Replace <HTTPMethod> with the appropriate HTTP method (GET, POST, PUT, or DELETE). Replace <URL> with the URL of the API endpoint you wish to access. If you are making a POST, PUT, or DELETE request, you will also need to add the data you wish to send in the body of the request. Once you have entered the command, you can press Enter to make the request. The response from the API will be displayed in the command-line window.
API Test Cases
1. Verify that the API is returning the expected response code. 2. Verify that the API is returning the expected data type. 3. Verify that the API is returning the expected output format. 4. Verify that the API is returning the expected data. 5. Verify that the API is handling invalid requests correctly. 6. Verify that the API is handling incomplete requests correctly. 7. Verify that the API is returning the correct error codes for invalid requests. 8. Verify that the API is authenticating users correctly. 9. Verify that the API is validating input parameters correctly. 10. Verify that the API is returning the correct response time.