Cookie クラス

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17// A Visualforce controller class that creates a cookie
18// used to keep track of how often a user displays a page
19public class CookieController {
20
21    public CookieController() {
22        Cookie counter = ApexPages.currentPage().getCookies().get('counter');
23    
24        // If this is the first time the user is accessing the page, 
25        // create a new cookie with name 'counter', an initial value of '1', 
26        // path 'null', maxAge '-1', and isSecure 'false'. 
27        if (counter == null) {
28            counter = new Cookie('counter','1',null,-1,false);
29        } else {
30        // If this isn't the first time the user is accessing the page
31        // create a new cookie, incrementing the value of the original count by 1
32            Integer count = Integer.valueOf(counter.getValue());
33            counter = new Cookie('counter', String.valueOf(count+1),null,-1,false);
34        }
35    
36        // Set the new cookie for the page
37        ApexPages.currentPage().setCookies(new Cookie[]{counter});
38    }
39
40    // This method is used by the Visualforce action {!count} to display the current 
41    // value of the number of times a user had displayed a page. 
42    // This value is stored in the cookie.
43    public String getCount() {
44        Cookie counter = ApexPages.currentPage().getCookies().get('counter');
45        if(counter == null) {
46            return '0';
47        }
48        return counter.getValue();
49    }
50}

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17// Test class for the Visualforce controller
18@isTest
19private class CookieControllerTest {
20  // Test method for verifying the positive test case
21  static testMethod void testCounter() {
22    //first page view
23    CookieController controller = new CookieController();
24    System.assert(controller.getCount() == '1');
25
26    //second page view       
27    controller = new CookieController();
28    System.assert(controller.getCount() == '2');
29  }
30}