如何在无 Activity 类中测试 Intent

Question

我正在尝试创建一个创建 Intent 并启动新 Activity 的类，现在我在测试它时遇到了问题。

private static final String TAG = IntentToActivity.class.getSimpleName();

// ----------------
// START VARIABLES
// ----------------
private String fqClassName;
private Intent intentToActivity;
private Context context;
// --------------
// END VARIABLES
// --------------

/**
 * Constructor sets needed variables, creates and performs intent
 * @param fqClassName full qualified class name to intent to
 * @param context context of the current using activity
 */
public IntentToActivity(String fqClassName, Context context) {
    this.fqClassName = fqClassName;
    this.context = context;

    performIntent();
}

/**
 * Creates and performs intent
 *
 * IMPORTANT: Intent must be referented in the manifest of the application use following code:
 * <intent-filter>
 *      <action android:name="com.example.exampleapplication.ExampleClass" />
 *      <category android:name="android.intent.category.DEFAULT" />
 * </intent-filter>
 */
private void performIntent() {
    if (fqClassName != null) {
        try {
            intentToActivity = new Intent(fqClassName);
            context.startActivity(intentToActivity);
        } catch (Exception e) {
            Log.e(TAG, "performIntent error: ", e);
        }
    }
}

}

我的安卓测试

公共类 IntentToActivityTest { @规则 public IntentsTestRule intentsRule = new IntentsTestRule(IntentToActivity.class);

@Test
public void newActivityLaunchingTest() {

    Intents.intended(IntentMatchers.hasComponent("com.example.mmal.example.auth.IntentToActity2Example"));

}

我的第一个问题，如何开始测试意图 我的第二个，如何实现一个非活动类作为规则

当前错误日志：

java.lang.RuntimeException: Could not launch activity
at androidx.test.runner.MonitoringInstrumentation.startActivitySync(MonitoringInstrumentation.java:467)
at androidx.test.rule.ActivityTestRule.launchActivity(ActivityTestRule.java:354)
at androidx.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:525)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at androidx.test.runner.AndroidJUnit4.run(AndroidJUnit4.java:104)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:388)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2108)
Caused by: java.lang.RuntimeException: Unable to resolve activity for: Intent { act=android.intent.action.MAIN flg=0x14000000 cmp=com.motionminers.mmal.test/com.motionminers.mmal.backend.mv.IntentToActivity }
at android.app.Instrumentation.startActivitySync(Instrumentation.java:447)
at androidx.test.runner.MonitoringInstrumentation.access$101(MonitoringInstrumentation.java:98)
at androidx.test.runner.MonitoringInstrumentation$4.call(MonitoringInstrumentation.java:443)
at androidx.test.runner.MonitoringInstrumentation$4.call(MonitoringInstrumentation.java:440)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)

Answer 1

您不应测试 Android 类。这是因为模拟它，是一项非常繁重和艰苦的工作。

在 MVP 架构中，您可以将 Intent 数据（例如 String）传递给 Presenter，这样他就可以分析这些数据并告诉 View（Activity）如何表现。

因此，在这个示例场景中，您可以在构造函数中传递任何 String 数据并测试 Presenter 是否调用了某个 View 方法。