0.sh

$ cd sample
$ ant debug install
$ cd ../sampletest
$ ant test

test:
     [echo] Running tests ...
     [exec]
     [exec] com.sample.GreeterTest:
     [exec] Failure in testExpectAGreetingAfterSubmittingAName:
     [exec] junit.framework.AssertionFailedError: Greeting not found
     ...
     [exec] FAILURES!!!
     [exec] Tests run: 1,  Failures: 1,  Errors: 0

1.sh

$ cd sampletest
$ ant debug install
$ adb shell am instrument -w -e class com.sample.MainTest com.sample.tests/android.test.InstrumentationTestRunner com.sample.MainTest:
Failure in testExpectToIntendToStartANewActivityAfterSubmittingAName:
junit.framework.AssertionFailedError: Intent not started
...
Test results for InstrumentationTestRunner=.F
Time: 0.284

FAILURES!!!

2.sh

$ cd sample
$ ant debug install
$ cd ../sampletest
$ adb shell am instrument -w -e class com.sample.MainTest com.sample.tests/android.test.InstrumentationTestRunner ests/android.test.InstrumentationTestRunner

com.sample.MainTest:.
Test results for InstrumentationTestRunner=.
Time: 0.268

OK (1 test)

3.sh

$ ant test
test:
     [echo] Running tests ...
     [exec]
     [exec] com.sample.GreeterTest:.
     [exec] com.sample.MainTest:.
     [exec] Test results for InstrumentationTestRunner=..
     [exec] Time: 4.99
     [exec]
     [exec] OK (2 tests)
     [exec]
     [exec]

BUILD SUCCESSFUL

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.sample"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
        <activity android:name="Main"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name="Greeting" />
    </application>
</manifest>

Greeting.java

package com.sample;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class Greeting extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);

      Intent intent = getIntent();
      String name = intent.getStringExtra("name");
      String greeting = String.format("Hello %s", name);

      TextView textView = new TextView(this);
      textView.setText(greeting);

      setContentView(textView);
    }
}

Main.java

package com.sample;

import android.app.Activity;
import android.os.Bundle;

public class Main extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
  <EditText
      android:id="@+id/name"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      />
  <Button
      android:id="@+id/submit"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:text="Submit"
      />
</LinearLayout>

Main2.java

package com.sample;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class Main extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button button = (Button) findViewById(R.id.submit);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                EditText editText = (EditText) findViewById(R.id.name);
                String name = editText.getText().toString();
                Intent greeting = new Intent(Main.this, Greeting.class);
                greeting.putExtra("name", name);
                startActivity(greeting);
            }
        });
    }
}

MainTest.java

package com.sample;

import android.test.ActivityUnitTestCase;
import android.app.Activity;
import android.content.Intent;
import android.widget.EditText;
import android.widget.Button;

public class MainTest extends ActivityUnitTestCase<Main> {
    public MainTest() {
        super(Main.class);
    }

    public void testExpectToIntendToStartANewActivityAfterSubmittingAName() {
        Intent intent = new Intent(getInstrumentation().getTargetContext(),
                                   Main.class);
        startActivity(intent, null, null);

        Activity activity = getActivity();

        String name = "Test User";
        EditText editText = (EditText) activity.findViewById(R.id.name);
        editText.setText(name);

        Button submit = (Button) activity.findViewById(R.id.submit);
        submit.performClick();

        Intent startedIntent = getStartedActivityIntent();
        assertNotNull("Intent not started", startedIntent);
        assertEquals(name, startedIntent.getStringExtra("name"));
    }
}