while calling method

  public class call_Test{
     static testMethod void unitTest(){

its given error that Methods defined as TestMethod do not support Web service callouts

public class uptodel {
     public static final String ts_url = 'https://example.com/study';
     public static void qTis() {
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        HttpResponse response = http.send(request);
            if (response.getStatusCode() == 200) {
                Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());
                List<Object> contacts = (List<Object>) results.get('contacts');
                for (Object contact: contacts) {

  • Have a look Mock Api callout for test class – Reshma Mar 2 '17 at 11:51
  • @cloudZigZag You need to create a Mock Test class for covering these kind of classes. Refer this link. – Rohit Mourya Mar 2 '17 at 11:51
  • my method is void type and in this example they return something how to implement this thing @RohitMourya – cloudZigZag Mar 2 '17 at 12:07
  • @cloudZigZag That was just an example. Try it and post your code if you get stuck. – Rohit Mourya Mar 2 '17 at 12:24
  • What does the method do? Does it update a List<Contact>? You could query for the Contacts and check they're updated, using the mock callout/response as @RohitMourya suggested. If you are updating Contacts, you can assert that the Contact list is updated based on the response or not. – Dan Jones Mar 2 '17 at 13:21

Since your test calls a method that executes a callout you need to mock the response during test methods.

The easiest way to do this is in sfdcfox's post here:

Help on Invokable Apex Test class and @Future callout Apex test Class

@isTest class MakeCalloutTest {
    // Simple echo callout class
    // Returns whatever response we tell it to when asked
    class EchoHttpMock implements HttpCalloutMock {
        HttpResponse res;
        EchoMock(HttpResponse r) {
            res = r;
        // This is the HttpCalloutMock interface method
        public HttpResponse respond(HttpRequest req) {
            return res;

    @isTest static void test() {
        // Avoid using live data
        List<Lead> leads = new List<Lead>{ new Lead(LastName='Test',Company='test') };
        insert leads;
        // We tell it what to simulate
        HttpResponse res = new HttpResponse();
        res.setBody('<?xml version="1.0" encoding="utf-8"?><root U_Id="12345"></root>');
        // This allows the callout to succeed
        Test.setMock(HttpCalloutMock.class, new EchoHttpMock(res));
        // Start the test
        // Enqueue the future call
        // Trigger future method
        // Verify logic
        leads = [select id__c from lead];
        System.assertEquals('12345', leads[0].Id__c);

He was even kind enough to put an example test method in there

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