[英]Robolectric: how to test class which use application instance inside?
[英]How to test Application class with Robolectric?
我正在嘗試使用Robolectric測試Parse.com的推送通知。 由於初始化必須在Application類中完成,我需要對其進行測試。 到目前為止,該應用程序在模擬器上運行良好,但我無法使用Robolectric進行測試。
我的onCreate應用程序類:
public void onCreate() {
super.onCreate();
// Add your initialization code here
Parse.initialize(this, APP_KEY,
CLIENT_ID);
// Specify an Activity to handle all pushes by default.
PushService.setDefaultPushCallback(this, MainActivity.class);
// Save the current Installation to Parse.
//This is null on test
android_id = Secure.getString(getApplicationContext()
.getContentResolver(), Secure.ANDROID_ID);
System.out.println("android id >>" + android_id);
ParseInstallation installation = ParseInstallation
.getCurrentInstallation();
installation.put("UniqueId", android_id);
installation.saveInBackground();
ParseUser.enableAutomaticUser();
ParseACL defaultACL = new ParseACL();
// If you would like all objects to be private by default, remove this
// line.
defaultACL.setPublicReadAccess(true);
Parse.setLogLevel(Parse.LOG_LEVEL_VERBOSE);
ParseACL.setDefaultACL(defaultACL, true);
}
測試
@RunWith(RobolectricTestRunner.class)
public class TestParseApplication extends Application {
private ParseApplication parseApplication;
@Before
public void setup() {
parseApplication = new ParseApplication();
parseApplication.android_id = "123";
Robolectric.application = parseApplication;
}
@Test
public void shouldPass() {
assertTrue(true);
}
}
堆棧跟蹤
WARNING: no system properties value for ro.build.date.utc
android id >>null
java.lang.IllegalArgumentException: Must subscribe to channel with a valid icon identifier.
at com.parse.PushService.setDefaultPushCallback(PushService.java:298)
at com.parse.PushService.setDefaultPushCallback(PushService.java:277)
at com.parse.starter.ParseApplication.onCreate(ParseApplication.java:30)
at org.robolectric.internal.ParallelUniverse.setUpApplicationState(ParallelUniverse.java:164)
at org.robolectric.RobolectricTestRunner.setUpApplicationState(RobolectricTestRunner.java:430)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:236)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:177)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
你應該將Parse API包裝到某個類並模擬它:
public class ParseAPI {
public void init(Context context, String key, String id) {
// Add your initialization code here
Parse.initialize(context, key,
id);
}
public void initPush(Context context, Class pushCallbackClass) {
// Specify an Activity to handle all pushes by default.
PushService.setDefaultPushCallback(context, puchCallbackClass);
}
}
修改您的應用:
public void onCreate() {
super.onCreate();
ParseAPI api = getParseAPI();
api.init(this, APP_KEY, CLIENT_ID)
api.initPush(this, MainActivity.class);
}
protected ParseAPI getParseAPI() {
return new ParseAPI();
}
修改您的測試應用和測試:
@RunWith(RobolectricTestRunner.class)
public class TestParseApplication extends ParseApplication {
private ParseApplication parseApplication;
@Before
public void setup() {
parseApplication = new TestParseApplication();
parseApplication.android_id = "123";
Robolectric.application = parseApplication;
}
protected ParseAPI getParseAPI() {
return new ParseAPI() {
public void init(Context context, String key, String id) {
}
public void initPush(Context context, Class pushCallbackClass) {
}
};
}
@Test
public void shouldPass() {
assertTrue(true);
}
}
如果我在鍵入時沒有出現任何錯誤,這應該有效。
當然這是個粗略的想法。 最好使用一些模擬庫而不是在測試中編寫匿名類(我最喜歡的是Mockito
)。 還請閱讀依賴性反轉和注入( IoC
)。 最后將Robolectric測試應用與應用測試分開要好得多(請參閱http://robolectric.blogspot.nl/2013/04/the-test-lifecycle-in-20.html )
public class TestParseApplication extends Application
這應該是測試集或測試套件,而不是您正在測試的實際類。
對於每個測試,您需要實例化Application類。 實際上,如果您在清單中正確聲明了Application類,Robolectric會為您執行此操作,並且您可以從robolectric api:getShadowApplication()獲取當前應用程序實例(具有增強的測試功能)。
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