我正在尝试使用 Espresso 来测试我的 UI。当我登录到我的应用程序时,我调用 Parse API(网络调用)来验证用户名和密码。如果一切顺利,用户将被引导至新 Activity 。我想对此进行测试,但我似乎无法使用空闲资源。
代码:
public class ApplicationTest extends ActivityInstrumentationTestCase2<LoginActivity> {
private CountingIdlingResource fooServerIdlingResource;
public ApplicationTest() {
super(LoginActivity.class);
}
@Before
public void setUp() throws Exception {
super.setUp();
injectInstrumentation(InstrumentationRegistry.getInstrumentation());
getActivity();
CountingIdlingResource countingResource = new CountingIdlingResource("FooServerCalls");
this.fooServerIdlingResource = countingResource;
Espresso.registerIdlingResources(countingResource);
}
public void testChangeText_sameActivity() {
// Type text and then press the button.
onView(withId(R.id.username))
.perform(typeText("s@s.nl"), closeSoftKeyboard());
onView(withId(R.id.password))
.perform(typeText("s"), closeSoftKeyboard());
if(performClick())
onView(withId(R.id.main_relative_layout))
.check(matches(isDisplayed()));
// Check that the text was changed.
}
public boolean performClick(){
fooServerIdlingResource.increment();
try {
onView(withId(R.id.login)).perform(click());
return true;
} finally {
fooServerIdlingResource.decrement();
}
}
@SuppressWarnings("javadoc")
public final class CountingIdlingResource implements IdlingResource {
private static final String TAG = "CountingIdlingResource";
private final String resourceName;
private final AtomicInteger counter = new AtomicInteger(0);
private final boolean debugCounting;
// written from main thread, read from any thread.
private volatile ResourceCallback resourceCallback;
// read/written from any thread - used for debugging messages.
private volatile long becameBusyAt = 0;
private volatile long becameIdleAt = 0;
/**
* Creates a CountingIdlingResource without debug tracing.
*
* @param resourceName the resource name this resource should report to Espresso.
*/
public CountingIdlingResource(String resourceName) {
this(resourceName, false);
}
/**
* Creates a CountingIdlingResource.
*
* @param resourceName the resource name this resource should report to Espresso.
* @param debugCounting if true increment & decrement calls will print trace information to logs.
*/
public CountingIdlingResource(String resourceName, boolean debugCounting) {
this.resourceName = checkNotNull(resourceName);
this.debugCounting = debugCounting;
}
@Override
public String getName() {
return resourceName;
}
@Override
public boolean isIdleNow() {
return counter.get() == 0;
}
@Override
public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
this.resourceCallback = resourceCallback;
}
/**
* Increments the count of in-flight transactions to the resource being monitored.
* <p/>
* This method can be called from any thread.
*/
public void increment() {
int counterVal = counter.getAndIncrement();
if (0 == counterVal) {
becameBusyAt = SystemClock.uptimeMillis();
}
if (debugCounting) {
Log.i(TAG, "Resource: " + resourceName + " in-use-count incremented to: " + (counterVal + 1));
}
}
/**
* Decrements the count of in-flight transactions to the resource being monitored.
* <p/>
* If this operation results in the counter falling below 0 - an exception is raised.
*
* @throws IllegalStateException if the counter is below 0.
*/
public void decrement() {
int counterVal = counter.decrementAndGet();
if (counterVal == 0) {
// we've gone from non-zero to zero. That means we're idle now! Tell espresso.
if (null != resourceCallback) {
resourceCallback.onTransitionToIdle();
}
becameIdleAt = SystemClock.uptimeMillis();
}
if (debugCounting) {
if (counterVal == 0) {
Log.i(TAG, "Resource: " + resourceName + " went idle! (Time spent not idle: " +
(becameIdleAt - becameBusyAt) + ")");
} else {
Log.i(TAG, "Resource: " + resourceName + " in-use-count decremented to: " + counterVal);
}
}
checkState(counterVal > -1, "Counter has been corrupted!");
}
/**
* Prints the current state of this resource to the logcat at info level.
*/
public void dumpStateToLogs() {
StringBuilder message = new StringBuilder("Resource: ")
.append(resourceName)
.append(" inflight transaction count: ")
.append(counter.get());
if (0 == becameBusyAt) {
Log.i(TAG, message.append(" and has never been busy!").toString());
} else {
message.append(" and was last busy at: ")
.append(becameBusyAt);
if (0 == becameIdleAt) {
Log.w(TAG, message.append(" AND NEVER WENT IDLE!").toString());
} else {
message.append(" and last went idle at: ")
.append(becameIdleAt);
Log.i(TAG, message.toString());
}
}
}
}
}
我现在得到的异常如下:
ndroid.support.test.espresso.IdlingResourceTimeoutException: Wait for [FooServerCalls] to become idle timed out
当我运行测试时,正在填写用户名和密码,但从未调用过执行单击,几秒钟后我得到了异常。应该如何正确实现空闲资源?
编辑 --
我建议使用适用于 Android 的 Calabash。 Calabash 的工作原理类似,但不需要您更改应用代码进行测试。
最佳答案
就像其他答案所暗示的那样,countingIdlingResource 并不真正适用于您的用例。
我总是做的是添加一个接口(interface) - 我们称之为 ProgressListener
- 作为具有等待资源的 Activity/fragment 的字段(异步后台工作,更长的网络 session ,等)以及每次显示或关闭进度时通知它的方法。
我假设您在 LoginActivity
中有凭据验证逻辑和对 Parse API 的调用,如果成功,它将调用 MainActivity
的 Intent 。
public class LoginActivity extends AppCompatActivity {
private ProgressListener mListener;
...
public interface ProgressListener {
public void onProgressShown();
public void onProgressDismissed();
}
public void setProgressListener(ProgressListener progressListener) {
mListener = progressListener;
}
...
public void onLoginButtonClicked (View view) {
String username = mUsername.getText().toString();
String password = mPassword.getText().toString();
// validate credentials for blanks and so on
// show progress and call parse login in background method
showProgress();
ParseUser.logInInBackground(username,password, new LogInCallback() {
@Override
public void done(ParseUser parseUser, ParseException e) {
dismissProgress();
if (e == null){
// Success!, continue to MainActivity via intent
Intent intent = new Intent (LoginActivity.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
else {
// login failed dialog or similar.
}
}
});
}
private void showProgress() {
// show the progress and notify the listener
...
notifyListener(mListener);
}
private void dismissProgress() {
// hide the progress and notify the listener
...
notifyListener(mListener);
}
public boolean isInProgress() {
// return true if progress is visible
}
private void notifyListener(ProgressListener listener) {
if (listener == null){
return;
}
if (isInProgress()){
listener.onProgressShown();
}
else {
listener.onProgressDismissed();
}
}
}
然后,只需执行 IdlingResource当资源通过其ResourceCallBack 由忙转为空闲时,类并覆盖其通信方法。
public class ProgressIdlingResource implements IdlingResource {
private ResourceCallback resourceCallback;
private LoginActivity loginActivity;
private LoginActivity.ProgressListener progressListener;
public ProgressIdlingResource(LoginActivity activity){
loginActivity = activity;
progressListener = new LoginActivity.ProgressListener() {
@Override
public void onProgressShown() {
}
@Override
public void onProgressDismissed() {
if (resourceCallback == null){
return ;
}
//Called when the resource goes from busy to idle.
resourceCallback.onTransitionToIdle();
}
};
loginActivity.setProgressListener (progressListener);
}
@Override
public String getName() {
return "My idling resource";
}
@Override
public boolean isIdleNow() {
// the resource becomes idle when the progress has been dismissed
return !loginActivity.isInProgress();
}
@Override
public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
this.resourceCallback = resourceCallback;
}
}
最后一步是在测试的 setUp()
方法中注册您的自定义空闲资源:
Espresso.registerIdlingResources(new ProgressIdlingResource((LoginActivity) getActivity()));
就是这样!现在 espresso 将等待您的登录过程完成,然后继续进行所有其他测试。
如果我不够清楚或者这正是您所需要的,请告诉我。
关于android - 如何使用 Espresso 空闲资源进行网络调用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30733718/