使用PowerMockito的以上下文为参数的模拟静态方法

Question

public class GrandUtils {
 
    /**
     * Return list of existing user's emails
     *
     * @param c context of the app
     * @return list of existing accounts in system or empty list
     */
    public static Set<String> getAccountsList(Context c) {
        Set<String> accountsList = new HashSet<>();
        Pattern emailPattern = Patterns.EMAIL_ADDRESS; // API level 8+
        Account[] accounts = AccountManager.get(c).getAccounts();
        for (Account account : accounts) {
            if (emailPattern.matcher(account.name).matches()) {
                accountsList.add(account.name);
            }
        }
        return accountsList;
    }
}

    @RunWith(MockitoJUnitRunner.class)
    @PrepareForTest(GrandUtils.class)
    public class CampaingTrackingTest extends ApplicationTestCase<Application> {
        
            public CampaingTrackingTest() {
                super(Application.class);
            }
        
            @Override
            @Before
            public void setUp() throws Exception {
                super.setUp();
                System.setProperty("dexmaker.dexcache", getContext().getCacheDir().getPath());
                createApplication();
            }
        
            @MediumTest
            public void testMockAccounts() {
                HashSet<String> mails = new HashSet<>();
                mails.add("[e-mail]");
                //it needs Context
PowerMockito.when(GrandUtils.getAccountsList(getContext())).thenReturn(mails);
        
                Set<String> givenMails = GrandUtils.getAccountsList(getContext());
                assertNotNull(givenMails);
                assertEquals(givenMails.size(), 1);
        
                // Next part for comparing data with IntentService and SharedPreferences
            }
        }

在when（）中，您不是在mock上调用method，而是在其他对象上调用method。

我肯定我做错了什么，但什么？

Answer 1

有关静态方法log.d（String tag,String message)的模拟，请参见此PowerMock示例：

https://github.com/mttkay/droid-fu/blob/master/src/test/java/com/github/droidfu/testbase.java

我认为它为处理静态方法提供了一个很好的例子。