Android X + Truth + Guava test compile issue
I have an Android library (called api) gradle module as part of a larger project. I just migrated the whole project to AndroidX. I now have this error when running instrumentation test on the api lib:
Task :api:checkDebugAndroidTestDuplicateClasses FAILEDFAILURE: Build failed with an exception.
- What went wrong:
Execution failed for task ‘:api:checkDebugAndroidTestDuplicateClasses’.
> 1 exception was raised by workers:
java.lang.RuntimeException: java.lang.RuntimeException: Duplicate class com.google.common.util.concurrent.ListenableFuture found in modules jetified-guava-25.1-android.jar (com.google.guava:guava:25.1-android) and listenablefuture-1.0.jar (com.google.guava:listenablefuture:1.0)
If I check the runtime class path for the debugAndroidTest variant:
./gradlew api:dependencies --configuration debugAndroidTestRuntimeClasspath | grep --color -E “guava|$”
I get this output. I can see the problem:
------------------------------------------------------------
Project :api
debugAndroidTestRuntimeClasspath - Resolved configuration for runtime for variant: debugAndroidTest
±-- project :test_utils
| ±-- project :core
…
| ±-- project :api ()
| ±-- com.google.android.material:material:1.1.0-alpha03
| | ±-- androidx.annotation:annotation:1.0.1 -> 1.1.0-alpha01
| | ±-- androidx.appcompat:appcompat:1.1.0-alpha01
| | | ±-- androidx.annotation:annotation:1.0.0 -> 1.1.0-alpha01
| | | ±-- androidx.core:core:1.1.0-alpha01 -> 1.1.0-alpha03
| | | | ±-- com.google.guava:listenablefuture:1.0 // <------ GUAVA
| | | | ±-- androidx.annotation:annotation:1.0.1 -> 1.1.0-alpha01
…
±-- com.google.truth:truth:0.42
| ±-- com.google.guava:guava:25.1-android / <------ MORE GUAVA
| | ±-- com.google.code.findbugs:jsr305:3.0.2
| | ±-- com.google.errorprone:error_prone_annotations:2.1.3 -> 2.3.1
| | ±-- com.google.j2objc:j2objc-annotations:1.1
| | — org.codehaus.mojo:animal-sniffer-annotations:1.14
| ±-- org.checkerframework:checker-compat-qual:2.5.3
| ±-- org.checkerframework:checker-qual:2.5.3
| ±-- junit:junit:4.12 ()
| ±-- com.googlecode.java-diff-utils:diffutils:1.3.0
| ±-- com.google.auto.value:auto-value-annotations:1.6.2
| — com.google.errorprone:error_prone_annotations:2.3.1
…
AndroidX core is depending on the new “ListableFuture-only” build of guava and Truth is depending on the full Guava 25.
I think I understand the underlying problem with ListenableFuture: https://groups.google.com/forum/#!topic/guava-announce/Km82fZG68Sw
What is the right solution here?
I don’t want to exclude Guava from Truth entirely (otherwise Truth won’t compile)
androidTestImplementation(“com.google.truth:truth:0.42”) {
exclude group: ‘com.google.guava’, module: ‘guava’
}
Can I exclude + force update to Guava 27 by making it a first-level dependency:
androidTestImplementation(“com.google.truth:truth:$rootProject.ext.truthVersion”) {
exclude group: ‘com.google.guava’, module: ‘guava’
}
// must add guava as top level dependency to force Truth to use latest version
androidTestImplementation ‘com.google.guava:guava:27.0.1-android’
If I do this, should I be using the android or JRE version of guava?
Side question:
Why don’t I see the guava dependency when looking at compile classpath? The error is a compile time error, not a runtime error
./gradlew api:dependencies --configuration debugAndroidTestCompileClasspath | grep --color -E “guava|$”
Resulting deps:
debugAndroidTestCompileClasspath - Resolved configuration for compilation for variant: debugAndroidTest
±-- project :test_utils // <----------- why are test_utils deps not listed here???
…
±-- com.google.truth:truth:0.42
| ±-- com.google.guava:guava:25.1-android <------ GUAVA
| | ±-- com.google.code.findbugs:jsr305:3.0.2
| | ±-- org.checkerframework:checker-compat-qual:2.0.0 -> 2.5.3
| | ±-- com.google.errorprone:error_prone_annotations:2.1.3 -> 2.3.1
| | ±-- com.google.j2objc:j2objc-annotations:1.1
| | — org.codehaus.mojo:animal-sniffer-annotations:1.14
| ±-- org.checkerframework:checker-compat-qual:2.5.3
| ±-- org.checkerframework:checker-qual:2.5.3
| ±-- junit:junit:4.12 (*)
| ±-- com.googlecode.java-diff-utils:diffutils:1.3.0
| ±-- com.google.auto.value:auto-value-annotations:1.6.2
| — com.google.errorprone:error_prone_annotations:2.3.1
…
±-- com.google.truth:truth:{strictly 0.42} -> 0.42 ©
±-- com.google.guava:guava:{strictly 25.1-android} -> 25.1-android © // <--------- why is this listed again here at top level?
#android