Yukiの枝折: Android : espresso.contribでRecyclerViewをテスト

RecyclerViewのテストにespresso-contribライブラリを導入する.

RecyclerViewActions: handles interactions with RecyclerViews
PickerActions: handles interactions with Date and Time pickers

今回の環境は下記.

Android Studio 1.2.1.1
Espresso 2.1
appcompat-v7:22.1.1
recyclerview-v7:21.0.3
espresso-contrib 2.1

build.gradle

JUnit4サポートのためTestRunnerを定義しておく.

  android {
    defaultConfig {
      ...
      testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
  }

今回はAppCompatとRecyclerViewを導入.

  dependencies {
    compile 'com.android.support:appcompat-v7:22.1.1'
    compile 'com.android.support:recyclerview-v7:21.0.3'

espresso-contribはsub-dependenciesとして次のライブラリへの依存関係を含んでいる.

com.android.support:support-annotations
com.android.support:support-v4
com.android.support:recyclerview-v7
com.android.support.test.espresso:espresso-core

espresso-contribの導入にはGradleの依存関係ツリーをコントロールする必要がある.

support-anotationsはAppCompatにも含まれおり, コンフリクト回避のため除外しておく.
compileコンフィギュレーションでsupport-anotationsを取込み済みなのでandroidTestCompileコンフィギュレーションでは不要.

  android {
     configurations {
         // Resolved 'com.android.support:support-annotations' versions for app (xx.x.x) and test app (xx.x.x) differ.
         // Add this statement if 'com.android.support:support-annotations:x.x.x' dependencies was already defined in compile configuration.
         androidTestCompile.exclude group: 'com.android.support', module: 'support-annotations'
     }
   }

espresso-contribはcom.android.support.test.espresso:espresso-coreを含んでいるためこれを定義する必要はない.

  dependencies {
    // You can compile without 'espresso-core'. Because 'espresso-contrib' has.
    // androidTestCompile 'com.android.support.test.espresso:espresso-core:2.1'

また, espresso-contribはcom.android.support:support-v4とcom.android.support:recyclerview-v7も含んでいるため,
コンフリクト回避のためこれを除外しておく.

  dependencies {
    androidTestCompile ('com.android.support.test.espresso:espresso-contrib:2.1') {
        exclude group: 'com.android.support', module: 'support-v4'
        exclude group: 'com.android.support', module: 'recyclerview-v7'
    }
    androidTestCompile 'com.android.support.test:rules:0.2'
  }

お決まりのLICENSE.txtのコンフリクトも解消しておく.

  android {
    packagingOptions {
        exclude 'LICENSE.txt'
    }
  }

Gradleの全容は下記を参照.
build.gradle

テストケースを書く

既にEspressoを実行できる準備はできているのでテストケースを書けば完了.

@RunWith(AndroidJUnit4.class)
public class ApplicationTest  {
    @Rule
    public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule<>(MainActivity.class);

    @Test
    public void RecyclerViewItemのクリック() {
        onView(withId(R.id.list)).perform(
                RecyclerViewActions.actionOnItemAtPosition(0, click()));
    }
}

ApplicationTest.java

Point

// build.gradle
android {
    packagingOptions {
        exclude 'LICENSE.txt'
    }
    configurations {
        // Resolved 'com.android.support:support-annotations' versions for app (22.1.1) and test app (22.0.0) differ.
        // Add this statement if 'com.android.support:support-annotations:x.x.x' dependencies was already defined in compile configuration.
        androidTestCompile.exclude group: 'com.android.support', module: 'support-annotations'
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')

    // 'appcompat-v7' has 'support-annotations'.
    compile 'com.android.support:appcompat-v7:22.1.1'
    compile 'com.android.support:recyclerview-v7:21.0.3'

    testCompile 'junit:junit:4.12'
    testCompile "org.mockito:mockito-core:1.9.5"

    // If you are on a Mac, you will probably need to configure the default JUnit test runner configuration
    // in order to work around a bug where Android Studio does not set the working directory to the module being tested.
    // This can be accomplished by editing the run configurations, Defaults -> JUnit and changing the working directory value to $MODULE_DIR$.
    //  - Resolved java.io.FileNotFoundException: build/intermediates/bundles/debug/AndroidManifest.xml (No such file or directory)
    //  - Resolved java.lang.UnsupportedOperationException: Robolectric does not support API level 1.
    //  - see. https://github.com/robolectric/robolectric/issues/1648
    //  - see. http://robolectric.org/getting-started/#Note for Mac Users
    testCompile 'org.robolectric:robolectric:3.0-rc2'

    // You can compile without 'espresso-core'. Because 'espresso-contrib' has.
    // androidTestCompile 'com.android.support.test.espresso:espresso-core:2.1'

    // When you use "espresso-contrib:2.0" with "rules:0.2".
    // might "com.android.dex.DexException: Multiple dex files define Landroid/support/test/BuildConfig;" occur.
    androidTestCompile ('com.android.support.test.espresso:espresso-contrib:2.1') {
        // Resolved java.lang.NoClassDefFoundError: your.package.name.EspressoTargetActivity
        // 'espresso-contrib' has already 'support-v4' package.
        exclude group: 'com.android.support', module: 'support-v4'

        // Resolved java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation
        // 'espresso-contrib' has already 'recyclerview-v7' package.
        exclude group: 'com.android.support', module: 'recyclerview-v7'
    }

    // You can compile without 'runner'. Because 'rules' has.
    // androidTestCompile 'com.android.support.test:runner:0.2'
    androidTestCompile 'com.android.support.test:rules:0.2'
}

Copyright

Licensed under the Apache License, Version 2.0 (the “License”);
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an “AS IS” BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

以上.