317 lines
14 KiB
HTML
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317 lines
14 KiB
HTML
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<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
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<title>Android - Instrumentation Framework</title>
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<li> <strong>Telephony</strong>
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<ul>
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<li><a href="telephony.html">Radio Interface Layer</a></li>
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<li> <strong>Testing</strong>
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<li><a href="instrumentation_framework.html">Instrumentation Framework</a></li>
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<li><a href="instrumentation_testing.html">Instrumentation Testing</a></li>
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<div id="jd-content">
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<div class="jd-descr">
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<a name="androidTitleInstrumentationFramework"></a><h1>Instrumentation Framework</h1>
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<a name="toc"/>
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<div style="padding:10px">
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<a href="#androidInstrumentationFrameworkIntro">Introduction</a><br/>
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<a href="#androidInstrumentationFrameworkamCommand">Understanding the am Command</a><br/>
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<a href="#androidInstrumentationFrameworkWritingRunning">Writing and Running Test Cases</a><br/>
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<a href="#androidInstrumentationFrameworkTestCase">Exploring a Test Case</a><br/>
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<a href="#androidInstrumentationFrameworkTroubleshooting">Troubleshooting</a><br/></div></font></div>
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<a name="androidInstrumentationFrameworkIntro"></a><h2>Introduction</h2>
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<p>This document describes how to use the Instrumentation Framework to write test cases. You should have a working knowledge of the following:</p>
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<ul>
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<li> Android Application Framework </li>
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<li> Using <code>adb</code>, <code>am</code> and various logging functionality </li>
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<li> A brief understanding of the application of interest, that is, he names of the classes which handle the intents etc. </li>
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<li> Junit testing. </li>
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</ul>
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<p> Each Android application runs in its own process. Instrumentation kills the application process and restarts the process with Instrumentation. Instrumentation gives a handle to the application context used to poke around the application to validate test assertions, allowing you to write test cases to test applications at a much lower level than UI screen shot tests. Note that Instrumentation cannot catch UI bugs. </p>
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<a name="androidInstrumentationFrameworkamCommand"></a><h2>Understanding the am Command</h2>
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<p><code>am</code> is used to start and instrument activities using the adb shell command, as shown in the snippet below:</p>
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<pre class="prettify">
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> adb shell am
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usage: am [start|instrument]
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am start [-a <ACTION>] [-d <DATA_URI>] [-t <MIME_TYPE>]
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[-c <CATEGORY> [-c <CATEGORY>] ...]
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[-e <EXTRA_KEY> <EXTRA_VALUE> [-e <EXTRA_KEY> <EXTRA_VALUE> ...]
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[-n <COMPONENT>] [-D] [<URI>]
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am instrument [-e <ARG_NAME> <ARG_VALUE>] [-p <PROF_FILE>]
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[-w] <COMPONENT>
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For example, to start the Contacts application you can use
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> adb shell am start -n com.google.android.contacts/.ContactsActivity
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</pre>
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<a name="androidInstrumentationFrameworkWritingRunning"></a><h2>Writing and Running Test Cases</h2>
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<p>Each instrumentation test case is similar to an Android application with the distinction that it starts another application. For example, have a look in the <code>tests/Contacts</code> directory. </p>
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<ul>
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<li> There should be a Makefile and an Android Manifest file. </li>
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<li> Tests are located in <code>tests/Contacts/src/com/google/android/contactstests</code>. </li>
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<li> The Instrumentation Test Runner is located at <code>tests/Contacts/src/com/google/android/contactstests/functional/ContactsInstrumentationTestRunner.java</code>.</li>
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</ul>
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<p>Suppose you have a makefile with <code>Contactstests</code> as the target. </p>
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<ul>
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<li> <code>make Contactstests</code>: Compiles the test cases. </li>
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<li> <code>adb install Contactstests.apk</code>: Installs the apk on the device. </li>
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<li> Use the adb shell <code>am</code> command to run them. </li>
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</ul>
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<p> For options and other details, please see <a href="instrumentation_testing.html" target="_top">Instrumentation Testing</a>.</p>
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<a name="androidInstrumentationFrameworkTestCase"></a><h2>Exploring a Test Case</h2>
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<p> The test case described in this section adds and tests a new Contact. Note that you can send intents, register intent receivers, etc. </p>
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<p><code>Instrumentation.java</code> has helper functions that send key events and string, for example: </p>
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<ul>
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<li><code>getInstrumentation()</code>: Returns the handle to the instrumentation </li>
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<li><code>sendCharacterSync</code>: Sends a character. </li>
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<li><code>sendStringSync</code>: Sends a string to an input box. </li>
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<li><code>sendKeyDownUpSync</code>: Sends a specific keyevent. </li>
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<li><code>sendTrackballEventSync</code>: Send a trackball event.</li>
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</ul>
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<p> You can find the test case below at <code>device/tests/Contacts.</code></p>
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<pre class="prettify">
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private void addNewContact(String name, int star, int phoneType, String number, String label,
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String email, int emailType){
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ContentValues values = new ContentValues();
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Uri phoneUri = null;
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Uri emailUri = null;
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values.put(Contacts.People.NAME, name);
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values.put(Contacts.People.STARRED, star);
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//Add Phone Numbers
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Uri uri = mActivity.getContentResolver().insert(Contacts.People.CONTENT_URI, values);
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phoneUri = Uri.withAppendedPath(uri, Contacts.People.Phones.CONTENT_DIRECTORY);
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values.clear();
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values.put(Contacts.Phones.TYPE, phoneType);
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values.put(Contacts.Phones.NUMBER, number);
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values.put(Contacts.Phones.LABEL, label);
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mActivity.getContentResolver().insert(phoneUri, values);
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//Add Email
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emailUri = Uri.withAppendedPath(uri, ContactMethods.CONTENT_DIRECTORY);
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values.clear();
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values.put(ContactMethods.KIND, Contacts.KIND_EMAIL);
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values.put(ContactMethods.DATA, email);
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values.put(ContactMethods.LABEL, "");
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values.put(ContactMethods.TYPE, emailType);
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mActivity.getContentResolver().insert(emailUri, values);
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}
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public void testAddSaveSingleContact(){
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int previousCount = mActivity.getListView().getCount();
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String message;
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addNewContact(INPUT_NAME_1 + "1", "5435754532", "1" + INPUT_EMAIL_1, CONFIRM_OPTION);
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message = "Added 1 to initial length=" + previousCount + ", but resulted with a count=" +
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mActivity.getListView().getCount();
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assertEquals(message, ++previousCount, mActivity.getListView().getCount());
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// Check Content; Name; Num; Starred
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assertEquals(INPUT_NAME_1 + "1", getTextFromView(0, android.R.id.text1));
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assertEquals("5435754532", getTextFromView(0, android.R.id.text2));
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//Check email is saved
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//cursor = returnEmailCursorAtId("1");
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Uri uri = Uri.parse("content://contacts/people/1");
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uri = Uri.withAppendedPath(uri, ContactMethods.CONTENT_DIRECTORY);
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Cursor cursor = mActivity.getContentResolver().query(uri, CONTACTS_COLUMNS, null, null, null);
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assertTrue("returnEmailCursorAtId: Moving cursor to first row has failed", cursor.first());
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int dataIndex = cursor.getColumnIndexOrThrow("data");
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assertEquals("1" + INPUT_EMAIL_1, cursor.getString(dataIndex));
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cursor.deactivate();
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}
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</pre>
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<a name="androidInstrumentationFrameworkTroubleshooting"></a><h2>Troubleshooting</h2>
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<p>If you run your test cases and nothing appears to happen, have a look at <code>adb logcat</code>. The following is a common problem:</p>
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<pre class="prettify">
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I/dalvikvm( 688): threadid=11: attached from native, name=Binder Thread #1
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I/dalvikvm( 688): threadid=13: attached from native, name=Binder Thread #2
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W/ActivityManager( 469): Unable to find instrumentation info for: ComponentInfo{com.google.android.browser_instrumentation/com.google.android.browser_instrumentation.BrowserWebkitLayoutInstrumentation}
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D/AndroidRuntime( 688): Shutting down VM
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E/AndroidRuntime( 688): ERROR: thread attach failed
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</pre>
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<p>It's possible that the instrumentation apk isn't installed on your device or that the package name is incorrect in the Manifest file. </p>
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<div id="jd-build-id"> v0.3 - 9 June 2008</div>
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