Make robolectric tests run against SDK 29 by default (flutter/engine#17996)

DEPS

@@ -138,7 +138,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + '71c54fdf2bcb63c70217c0beb8deec73787439b4',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + 'e32b5c320d36bdb7a21ecfc7a2f86787f63e8dd6',
 
    # Fuchsia compatibility
    #

engine/src/flutter/ci/licenses_golden/licenses_flutter

@@ -782,6 +782,7 @@ FILE: ../../../flutter/shell/platform/android/platform_view_android.cc
 FILE: ../../../flutter/shell/platform/android/platform_view_android.h
 FILE: ../../../flutter/shell/platform/android/platform_view_android_jni.cc
 FILE: ../../../flutter/shell/platform/android/platform_view_android_jni.h
+FILE: ../../../flutter/shell/platform/android/robolectric.properties
 FILE: ../../../flutter/shell/platform/android/vsync_waiter_android.cc
 FILE: ../../../flutter/shell/platform/android/vsync_waiter_android.h
 FILE: ../../../flutter/shell/platform/common/cpp/client_wrapper/basic_message_channel_unittests.cc

engine/src/flutter/shell/platform/android/BUILD.gn

@@ -455,6 +455,8 @@ action("robolectric_tests") {
     jar_path + ".md5.stamp",
   ]
 
+  additional_jar_files = [ "robolectric.properties" ]
+
   _jar_dependencies = [
                         android_sdk_jar,
                         embedding_jar_path,
@@ -462,16 +464,20 @@ action("robolectric_tests") {
 
   inputs = _jar_dependencies
 
+  _rebased_current_path = rebase_path(".")
   _rebased_jar_path = rebase_path(jar_path, root_build_dir)
   _rebased_depfile = rebase_path(depfile, root_build_dir)
   _rebased_classpath = rebase_path(_jar_dependencies, root_build_dir)
   _rebased_srcjars = rebase_path(_jar_dependencies, root_build_dir)
+  _rebased_additional_files = rebase_path(additional_jar_files, root_build_dir)
 
   args = [
     "--depfile=$_rebased_depfile",
     "--jar-path=$_rebased_jar_path",
     "--classpath=$_rebased_classpath",
+    "--jar-source-base-dir=$_rebased_current_path",
     "--java-srcjars=$_rebased_srcjars",
+    "--additional-jar-files=$_rebased_additional_files",
   ]
 
   args += rebase_path(sources, root_build_dir)

engine/src/flutter/shell/platform/android/embedding_bundle/README.md

@@ -14,9 +14,11 @@ Once you have updated the dependencies, you can upload a new version by running
 `cipd create --pkg-def cipd.yaml`. For more, see the Chromium instructions on ["Updating a CIPD
 dependency"](https://chromium.googlesource.com/chromium/src/+/master/docs/cipd.md#Updating-a-CIPD-dependency) for how to upload a package update to CIPD.
 
-Once you've uploaded the new version, also make sure to tag it with the updated
-timestamp and robolectric version (most likely still 3.8, unless you've migrated
-all the packages to 4+).
+On successful upload, you will receive a hash for the upload such as
+
+`cipd: successfully uploaded and verified flutter/android/embedding_bundle:NZvE-rL3E66nHQZb5Vyl9-1Y_1MWEX7KURgOHqX2cYcC`
+
+Let's further annotate the new upload with the current timestamp.
 
     $ cipd set-tag flutter/android/embedding_bundle --version=<new_version_hash> -tag=last_updated:<timestamp>
 

engine/src/flutter/shell/platform/android/embedding_bundle/build.gradle

@@ -33,7 +33,7 @@ configurations {
   embedding
   // Use any of these configurations for dependencies required for testing the embedding.
   embeddingTesting
-  embeddingTesting_duplicated
+  embeddingTesting_v16
 }
 
 android {
@@ -49,9 +49,13 @@ android {
     embedding "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
 
     // Testing
+    // TODO(xster): remove these android-all compile time dependencies.
+    // Use https://github.com/robolectric/robolectric/blob/master/robolectric/src/main/java/org/robolectric/plugins/LegacyDependencyResolver.java#L24
+    // and specify them as runtime dependencies.
     embeddingTesting "org.robolectric:android-all:8.1.0-robolectric-4611349"
-    // This is required by the robolectric test.
-    embeddingTesting_duplicated "org.robolectric:android-all:4.1.2_r1-robolectric-r1"
+    // Get robolectric shadows for SDK=16 used by PlatformPluginTest.
+    embeddingTesting_v16 "org.robolectric:android-all:4.1.2_r1-robolectric-r1"
+    embeddingTesting "androidx.fragment:fragment-testing:1.1.0"
     embeddingTesting "org.mockito:mockito-all:1.10.19"
     embeddingTesting ("org.robolectric:robolectric:4.3") {
       // org.hamcrest is added by org.mockito:mockito-all
@@ -71,7 +75,7 @@ task updateDependencies() {
   copy {
     from configurations.embedding
     from configurations.embeddingTesting
-    from configurations.embeddingTesting_duplicated
+    from configurations.embeddingTesting_v16
     into destinationDir
   }
   doLast {

engine/src/flutter/shell/platform/android/robolectric.properties

@@ -0,0 +1,2 @@
+# Match the value at shell/platform/android/embedding_bundle/build.gradle.
+sdk=29

engine/src/flutter/shell/platform/android/test/README.md

@@ -22,14 +22,6 @@ integration tests in other repos.
 
 ## Q&A
 
-### Why are we using Robolectric 3.8 when Robolectric 4+ is current?
-
-Robolectric 4+ uses the AndroidX libraries, and the engine sources use the
-deprecated android.support ones. See
-[flutter/flutter#23586](https://github.com/flutter/flutter/issues/23586). If
-this is an issue we could use Jetifier on `flutter.jar` first and _then_ run
-the tests, but it would add an extra point of failure.
-
 ### My new test won't run. There's a "ClassNotFoundException".
 
 See [Updating Embedding Dependencies](../embedding_bundle).

engine/src/flutter/shell/platform/android/test/io/flutter/embedding/android/FlutterViewTest.java

@@ -37,13 +37,9 @@ import org.robolectric.annotation.Config;
 import org.robolectric.annotation.Implementation;
 import org.robolectric.annotation.Implements;
 
-// TODO(xster): we have 2 versions of robolectric Android shadows in
-// shell/platform/android/embedding_bundle/build.gradle. Remove the older
-// org.robolectric:android-all:4.1.2_r1-robolectric-r1 which doesn't have the right shadow
-// behaviors.
-@Config(manifest = Config.NONE, sdk = 27)
+@Config(manifest = Config.NONE)
 @RunWith(RobolectricTestRunner.class)
-@TargetApi(27)
+@TargetApi(29)
 public class FlutterViewTest {
   @Mock FlutterJNI mockFlutterJni;
   @Mock FlutterLoader mockFlutterLoader;