How can I test ContentProvider query using Robolectric

[DIPANJAN DAS]

Hi Team,

I am developing one application which can read all inbox SMS from built in SMS database using ContentProvider URI content://sms/inbox

My snippet of code is below.

public Cursor retrieveSmsFromDevice(byte directoryType, ContentResolver resolver) {
    Cursor cursor = null;
    try {
        if (directoryType == 0 || resolver == null) {
            throw new RetrieveSmsException();
        }
        switch (directoryType) {
            case SmsDPConstant.INBOX:
                Uri inbox = Uri.parse(SmsDPConstant.INBOX_URI);
                cursor = resolver.query(inbox, SMS_PROJECTION, null, null, SORT_ORDER);
                return cursor;
            case SmsDPConstant.SENT:
                Uri send = Uri.parse(SmsDPConstant.SENT_URI);
                cursor = resolver.query(send, SMS_PROJECTION, null, null, SORT_ORDER);
                return cursor;
            case SmsDPConstant.DRAFT:
                Uri draft = Uri.parse(SmsDPConstant.DRAFT_URI);
                cursor = resolver.query(draft, SMS_PROJECTION, null, null, SORT_ORDER);
                return cursor;
        }
    } catch (RetrieveSmsException e) {
        e.printStackTrace();
    } finally {
        return cursor;
    }
}

When I am calling this function from robolectric test function I am getting Cursor object as NULL.

I am passing ContentResolver object. I am creating ContentResolver using robolectric.

Code Snippet: 

ContentResolver  mResolver =  RuntimeEnvironment.application.getContentResolver();

Please help me. How do I need to create shadow ContentProvider.

[DIPANJAN DAS]

I am using robolectric 3.2.2

[Maks Verver]

You probably need to create a fake/real instance of the SMS provider and register it using ShadowContentResolver.registerProvider().

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[DIPANJAN DAS]

@RunWith(RobolectricTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 21)
public class SmsDataPoolerTest {
    private Context mContext;
    private ContentResolver mResolver;
    @Before
    public void setUp() throws Exception {
        initMocks(this);
        mResolver = RuntimeEnvironment.application.getContentResolver();
    }

    @After
    public void tearDown() throws Exception {
        mContext = null;
    }

    @Test
    public void getInstance() throws Exception{
        SmsDataPooler dataPooler = SmsDataPooler.getInstance();
        assertNotNull(dataPooler);
    }

    @Test
    public void retrieveSmsFromDevice() throws Exception {
        ContentValues values = new ContentValues();
        values.put("address", "123456789");
        values.put("body", "foo bar");
        Uri uri = mResolver.insert(Telephony.Sms.Inbox.CONTENT_URI, values);
        System.out.println(uri.toString());
        SmsDataPooler dataPooler = SmsDataPooler.getInstance();
        Cursor cursor = dataPooler.retrieveSmsFromDevice(SmsDPConstant.INBOX, mResolver);
        assertNotNull(cursor);
        Cursor cursor1 = dataPooler.retrieveSmsFromDevice(SmsDPConstant.SENT, mResolver);
        assertNotNull(cursor1);
        Cursor cursor2 = dataPooler.retrieveSmsFromDevice(SmsDPConstant.DRAFT, mResolver);
        assertNotNull(cursor2);
    }

    @Test
    public void retrieveSmsFromDeviceNegetive() throws Exception {
        SmsDataPooler dataPooler = SmsDataPooler.getInstance();
        ContentResolver resolver = null;
        Cursor cursor = dataPooler.retrieveSmsFromDevice((byte)0, resolver);
        assertNull(cursor);
    }
}

This is my test class. I am getting null value for Cursor object when I am calling  retrieveSmsFromDevice(byte directoryType, ContentResolver resolver) function.

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[DIPANJAN DAS]

public Cursor retrieveSmsFromDevice(byte directoryType, ContentResolver resolver) {
    Cursor cursor = null;
    try {
        if (directoryType == 0 || resolver == null) {
            throw new RetrieveSmsException();
        }
        switch (directoryType) {
            case SmsDPConstant.INBOX:

                        cursor = resolver.query(Telephony.Sms.Inbox.CONTENT_URI,

                        SMS_PROJECTION, null, null, SORT_ORDER);
                return cursor;
            case SmsDPConstant.SENT:

                cursor = resolver.query(Telephony.Sms.Sent.CONTENT_URI,

                        SMS_PROJECTION, null, null, SORT_ORDER);
                return cursor;
            case SmsDPConstant.DRAFT:

                cursor = resolver.query(Telephony.Sms.Draft.CONTENT_URI,

                        SMS_PROJECTION, null, null, SORT_ORDER);
                return cursor;
        }
    } catch (RetrieveSmsException e) {
        e.printStackTrace();
    } finally {
        return cursor;
    }
}

On Thursday, February 16, 2017 at 11:13:38 PM UTC+5:30, DIPANJAN DAS wrote:

[Jonathan Gerrish]

Maks is correct you need to register a content provider to provide this functionality.

The preferred method however is Robolectric.buildContentProvider(ContentProvider.class);

Robolectric only provides the framework classes so I suspect the real Sms Content Provider is probably not available. If I were you I would provide a mock or fake content provider to serve up fake SMS messages for your test.

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