Test multiple APKs with Robolectric

2019/06/18 potatotips #62

Transcript

1. ©2019 Wantedly, Inc.
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   2019.6.18 -
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2. ©2019 Wantedly, Inc.
   Ryo Sakaguchi
   • Wantedly, Inc - Wantedly People
   • Android/CI/CD/UI
   • Kotlin/Sake/Beer/MtG/Guitar…
   • Twitter/GitHub: @wakwak3125
   

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3. ©2019 Wantedly, Inc.
   1. Robolectric
   • What’s this?
   • Why use this?
   • Binary Resources
   2. Testing the Multiple APKs w/Robolectric
   • Problem
   • Why?
   • Way to resolve
   3. WrapUp
   Today’s topics What I talk today
   

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4. ©2019 Wantedly, Inc.
   Robolectric
   

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5. ©2019 Wantedly, Inc.
   is a framework that brings fast and 

   reliable unit tests to Android. 

   Tests run inside the JVM on your 

   workstation in seconds.
   Robolectric
   robolectric.org
   

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6. ©2019 Wantedly, Inc.
   API is common to androidx.test
   

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7. ©2019 Wantedly, Inc.
   API is common to androidx.test
   

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8. ©2019 Wantedly, Inc.
   Binary Resources
   

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9. ©2019 Wantedly, Inc.
   Use resources processed using 

   the Android build toolchain.

   Loads and handles resources using 

   the same logic as on 

   an actual Android device.
   Binary Resources
   robolectric.org
   

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10. ©2019 Wantedly, Inc.
    Testing the Multiple APKs w/Robolectric
    

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11. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    Robolectric + Multiple APKs
    I got this error…
    > expected one element but was:

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12. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    Why this cause?
    Let's take a look source code a bit
    https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-
    core/src/main/java/com/android/build/gradle/internal/tasks/PackageForUnitTest.java
    

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13. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    ArtifactType
    Target artifact type to get. In this case, PROCESSED_RES(APK includes only resources)
    https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-
    core/src/main/java/com/android/build/gradle/internal/tasks/PackageForUnitTest.java
    

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14. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    BuildableArtifact
    Output Files
    https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-
    core/src/main/java/com/android/build/gradle/internal/tasks/PackageForUnitTest.java
    

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15. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    When you split APK…
    This should become multiple
    https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-
    core/src/main/java/com/android/build/gradle/internal/tasks/PackageForUnitTest.java
    

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16. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    BuildElements
    It returns BuildElements that match artifact type.
    https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-
    core/src/main/java/com/android/build/gradle/internal/tasks/PackageForUnitTest.java
    

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17. ©2019 Wantedly, Inc.
    Problem Testing the Multiple APKs w/Robolectric
    Iterables.getOnlyElement
    Returns the single element contained in iterable.

    IllegalArgumentException - if the iterable contains multiple elements
    https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-
    core/src/main/java/com/android/build/gradle/internal/tasks/PackageForUnitTest.java
    

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18. 
    ©2019 Wantedly, Inc.
    

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19. ©2019 Wantedly, Inc.
    Way to resolve Testing the Multiple APKs w/Robolectric
    I found some ways to resolve this
    • Use Android App Bundle(Recommended)
    • Android App Bundle allows you to separate the publish settings and
    build settings.(On publish, bundleXXX. On develop, assembleXXX)
    • And also reduce your APK size!
    • Introduce custom Gradle properties and switch it by command
    line arguments.
    • It’a not bad idea, but when you run tests on Android Studio, you
    have to set the arguments every time you want.
    • Until yesterday, I have been used this.
    Please choice by yourself
    

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20. ©2019 Wantedly, Inc.
    Test multiple APKs with Robolectric
    WrapUp
    • Test w/Robolectric + Binary Resources + Multiple APK does not
    work correctly.
    • I recommend to use Android App Bundle
    • You can fine issue here https://github.com/robolectric/
    robolectric/issues/4942
    

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21. Thanks!
    ©2019 Wantedly, Inc.
    

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