Postman API Testing Masterclass code added

Author: ChinmayKaitade

Postman API Testing Masterclass/API Requests.jpg

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+json-server
+
+1. Open Terminal
+2. Run command
+
+```bash
+ json-server file_name
+```

Postman API Testing Masterclass/APIs/Session03/How does it works.md

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+{
+ "students": [
+ {
+ "id": "1",
+ "name": "John",
+ "location": "India",
+ "phone": "1234567890",
+ "courses": [
+ "Java",
+ "Selenium"
+ ]
+ },
+ {
+ "id": "2",
+ "name": "Kim",
+ "location": "US",
+ "phone": "987654321",
+ "courses": [
+ "Python",
+ "C"
+ ]
+ },
+ {
+ "name": "Smith S.",
+ "location": "France",
+ "phone": "1345678789",
+ "courses": [
+ "JavaScript",
+ "Java"
+ ],
+ "id": "3"
+ }
+ ]
+}

Postman API Testing Masterclass/APIs/Session03/students.json

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+# Postman API Testing Master Class 🔥🚀
+
+## 01. Introduction ✅
+
+### Types of API
+
+**There are two types of API's,**
+
+1. Simple Object Access Protocol (SOAP)
+2. Representational State Transfer (REST)
+
+Both are the web services.
+
+### API vs WebServices
+
+- Web Service is an API wrapped in HTTP.
+- All Web Services are API but APIs are not Web Services.
+- A Web Service needs a network while an API doesn't need a network for its operation.
+
+## 02. Environment Setup ✅
+
+_Postman - API testing tool_
+
+- We can do manual testing of API's using postman.
+- Web / Desktop testing.
+- Workspace: Area where we maintain files and saved.
+- Create workspace, rename and delete.
+- Creating Collection - contains number of folders and http requests.
+ (Create, Rename, Delete and Run the collection)
+- We can create any number of collections under workspace.
+
+### HTTP Request
+
+**REQUEST ➡️ APIs ➡️ RESPONSE**
+
+**_GET_** ➡️ Retrieve the resource from database
+**_POST_** ➡️ Create resource on database
+**_PUT_** ➡️ Update existing resource on database
+**_DELETE_** ➡️ Delete existing resource from database
+**_PATCH_** ➡️ Update partial details of resource
+
+![APIs Requests](API%20Requests.jpg)
+
+### Validations
+
+**status code**
+**time**
+**size data**
+**response body(json/xml)**
+**cookies**
+**headers**
+
+### HTTP Status Code
+
+![Status Codes](Status%20Codes.jpg)
+
+## 03. Creating Our Own APIs ✅
+
+### Creating our own APIs
+
+**Step1 - Install NodeJS**
+
+**Step2 - Check Node and npm package manager version**
+
+```bash
+node -v
+npm -v
+```
+
+**Step3 - Install json-server**
+
+```bash
+ npm install -g json-server
+```
+
+### Test / Validations
+
+**JSON - JavaScript Object Notation**
+
+**Key Value Pairs => key:value**
+
+**_key is always included in "" quotation_**
+
+### json-server
+
+1. Open Terminal
+2. Run the following command to run API testing
+
+```bash
+ json-server file_name
+```
+
+```json
+{
+ "firstname": "John",
+ "secondname": null,
+ "age": 30,
+ "phone": 1234567890,
+ "status": true
+}
+```
+
+**Student Data**
+
+```json
+{
+ "students": [
+ {
+ "sid": 101,
+ "sname": "John",
+ "grad": "A"
+ },
+ {
+ "sid": 102,
+ "sname": "Kim",
+ "grad": "B"
+ },
+ {
+ "sid": 103,
+ "sname": "Scott",
+ "grad": "C"
+ }
+ ]
+}
+```
+
+### JSON vs XML
+
+![JSON and XML](JSON%20and%20XML.jpg)
+
+## 04. API Response Validations ✅
+
+### Response Validations
+
+**Status Code**
+**Headers**
+**Cookies**
+**Response time**
+**Response body**
+
+### Assertion Validation
+
+**pm - is a Library**
+**_Functions/ Assertions are available for assertion validations._**
+**_These Functions are written in JavaScript. Postman built-in uses JavaScript._**
+
+`pm.function inside JavaScript Function`
+
+**_We need to write our own JavaScript function and inside that we have to use `pm.function` for assertion validations._**
+
+**Normal Function**
+
+```javascript
+pm.test (“Test Name”, function ()
+{
+// assertion;
+}
+);
+```
+
+**Arrow Function**
+
+```javascript
+pm.test (“Test Name”, () =>
+	{
+// assertion;
+}
+);
+```
+
+### Testing Status Codes
+
+1. Go to Postman
+2. Create or Add a Request
+3. In Request, go to `Tests` tab
+4. Inside Test tab we have to write validation functions
+
+**Test for the response status code:**
+
+```javascript
+pm.test (“Status code is 200”, () => {
+pm.response.to.have.status(200);
+});
+```
+
+**If you want to test for the status code being one of a set, include them all in an array and use one of:**
+
+```javascript
+pm.test (“Successful POST request”, () => {
+pm.expect(pm.response.code).to.be.oneOf([201, 202]);
+});
+```
+
+**Check the status code text:**
+
+```javascript
+pm.test (“Status code name has string”, () => {
+pm.response.to.have.status(“Created”);
+});
+```