Testing Realm with Robolectric

[Daniel Vogel]

Hey, guys!

I'm using Robolectric (http://robolectric.org/) to test my Android app. The code to get an instance of Realm results in an UnsatisfiedLinkError.

Get an instance of Realm:

Realm.getInstance(Robolectric.application.getApplicationContext())

Result:

java.lang.UnsatisfiedLinkError: no tightdb-jni in java.library.path

   at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1886)

   at java.lang.Runtime.loadLibrary0(Runtime.java:849)

   at java.lang.System.loadLibrary(System.java:1088)

   at io.realm.internal.TightDB.loadLibrary(TightDB.java:144)

   at io.realm.internal.SharedGroup.<clinit>(SharedGroup.java:32)

   at io.realm.Realm.<init>(Realm.java:108)

   at io.realm.Realm.createAndValidate(Realm.java:366)

   at io.realm.Realm.create(Realm.java:355)

   at io.realm.Realm.getInstance(Realm.java:314)

   at io.realm.Realm.getInstance(Realm.java:193)

I was wondering if anyone has successfully used Robolectric to test their Realm app.

Thanks!

[Kenneth Geisshirt]

Hey Daniel,

First, thanks for trying out Realm. We really appreciate your feedback.

> I'm using Robolectric (http://robolectric.org/) to test my Android app. The code to get an instance of Realm results in an UnsatisfiedLinkError.

It sounds like that the shared objects (the .so files) weren’t copied into your build environment. Are you using Eclipse? There is a few manuel steps involved when using Eclipse - see the “Installation” section in our documentation: http://realm.io/docs/java/0.73.0/ (maybe you forgot step 2 in the Eclipse guide).

/kneth

--
Kenneth Geisshirt, M.Sc., Ph.D. · +45 60 62 71 82 · k...@realm.io
Njalsgade 19D, DK-2300 Copenhagen S · http://realm.io/

[Daniel Vogel]

Thanks, Kenneth! 

I'm using IntelliJ (basically, Android Studio) as my IDE. 

Would I have to do step 2 of the Eclipse guide if using IntelliJ? 

[Kenneth Geisshirt]

> On 10 Nov 2014, at 14:39, Daniel Vogel <voge...@gmail.com> wrote:
>
> I'm using IntelliJ (basically, Android Studio) as my IDE.
>
> Would I have to do step 2 of the Eclipse guide if using IntelliJ?

If you’re using Gradle, you should be able to point to Realm in your build file. If you copied the jar file manually, then you should copy the .so files too.

[Daniel Vogel]

I'm using Gradle.

I am able to successfully use Realm when running my app on the device/emulator, but not when running my unit tests with Robolectric. http://robolectric.org/

I was wondering if anyone has been able to use Robolectric (or another Android unit testing framework) to test an app that uses Realm.

Thanks!

[Kenneth Geisshirt]

> On 10 Nov 2014, at 14:57, Daniel Vogel <voge...@gmail.com> wrote:

> I am able to successfully use Realm when running my app on the device/emulator, but not when running my unit tests with Robolectric. http://robolectric.org/

Is it possible for you to share a small (non-working) app? It could help the debugging.

[Daniel Vogel]

Here is an example of getting an instance of Realm in a Robolectric test:

@RunWith(RobolectricTestRunner.class)

public class RealmTest {

  @Test

  public void realmShouldWork() {

    Realm realm = Realm.getInstance(Robolectric.application.getApplicationContext());

  }

}

The call to "getInstance" is where the originally posted exception occurs.

[TimNew]

Same issue here.

I assume to include Realm into Robolectric test, we need to create new shadow classes for Realm classes. At least, for all the facade classes.

[iker martin]

Same issue for me.

[Kenneth Geisshirt]

At Realm, we are aware that the Robolectric + Realm combo has issues. I have opened an issue at Robolectric (https://github.com/robolectric/robolectric/issues/1389). Please consider comment on that issue to raise the awareness at Robolectric about supporting Realm.

Best regards,
Kenneth

--
Kenneth Geisshirt
Member of technical staff

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