how to write a test in postman code example

Example 1: postman test script get request code

tests["Status code is 200"] = responseCode.code === 200;
//log
console.log(tests["Status code is 200"] = responseCode.code != 200)

Example 2: postman test script get request code

//set an environment variable
postman.setEnvironmentVariable("key", "value");

//set a nested object as an environment variable
const array = [1, 2, 3, 4];
postman.setEnvironmentVariable("array", JSON.stringify(array, null, 2));
const obj = { a: [1, 2, 3, 4], b: { c: 'val' } };
postman.setEnvironmentVariable("obj", JSON.stringify(obj));

//get an environment variable
postman.getEnvironmentVariable("key");

//get an environment variable whose value is a stringified object
//(wrap in a try-catch block if the data is coming from an unknown source)
const array = JSON.parse(postman.getEnvironmentVariable("array"));
const obj = JSON.parse(postman.getEnvironmentVariable("obj"));

//clear an environment variable
postman.clearEnvironmentVariable("key");

//set a global variable
postman.setGlobalVariable("key", "value");

//get a global variable
postman.getGlobalVariable("key");

//clear a global variable
postman.clearGlobalVariable("key");

//check if response body contains a string
tests["Body matches string"] = responseBody.has("string_you_want_to_search");

//check if response body is equal to a string
tests["Body is correct"] = responseBody === "response_body_string";

//check for a JSON value
const data = JSON.parse(responseBody);
tests["Your test name"] = data.value === 100;

//Content-Type is present (Case-insensitive checking)
tests["Content-Type is present"] = postman.getResponseHeader("Content-Type");
tests["Content-Type is present"] = postman.getResponseHeader("Content-Type");
//getResponseHeader() method returns the header value, if it exists

//Content-Type is present (Case-sensitive)
tests["Content-Type is present"] = responseHeaders.hasOwnProperty("Content-Type");

//response time is less than 200ms
tests["Response time is less than 200ms"] = responseTime < 200;

//response time is within a specific range
//(lower bound inclusive, upper bound exclusive)
tests["Response time is acceptable"] = _.inRange(responseTime, 100, 1001);

//status code is 200
tests["Status code is 200"] = responseCode.code === 200;

//code name contains a string
tests["Status code name has string"] = responseCode.name.has("Created");

//successful POST request status code
tests["Successful POST request"] = responseCode.code === 201 || responseCode.code === 202;