Taskcluster: test in Android emulator

.taskcluster.yml

@@ -27,8 +27,10 @@ tasks:
 
           # Granted to role "repo:github.com/servo/servo:branch:*"
           - "queue:create-task:highest:aws-provisioner-v1/servo-*"
+          - "queue:create-task:highest:proj-servo/*"
           - "queue:route:index.project.servo.servo.*"
           - "docker-worker:cache:servo-*"
+          - "docker-worker:capability:privileged"
 
         payload:
           maxRunTime: {$eval: '20 * 60'}

etc/taskcluster/decision_task.py

@@ -94,7 +94,7 @@ def android_arm32():
 
 
 def android_x86():
-    return (
+    build_task = (
         android_build_task("Android x86: release build")
         .with_script("./mach build --target i686-linux-android --release")
         .with_artifacts(
@@ -103,6 +103,30 @@ def android_x86():
         )
         .find_or_create("build.android_x86_release." + CONFIG.git_sha)
     )
+    return (
+        DockerWorkerTask("Android x86: tests in emulator")
+        .with_provisioner_id("proj-servo")
+        .with_worker_type("docker-worker-kvm")
+        .with_capabilities(privileged=True)
+        .with_scopes("project:servo:docker-worker-kvm:capability:privileged")
+        .with_dockerfile(dockerfile_path("run-android-emulator"))
+        .with_dependencies(build_task)
+        .with_env(BUILD_TASK_ID=build_task)
+        .with_repo()
+        .with_script("""
+            mkdir -p target/i686-linux-android/release/
+            ./etc/taskcluster/curl-artifact.sh ${BUILD_TASK_ID} servoapp.apk \
+                -o target/i686-linux-android/release/servoapp.apk
+
+            ./mach bootstrap-android --accept-all-licences --emulator-x86
+            ./mach test-android-startup --release
+            ./mach test-wpt-android --release \
+                /_mozilla/mozilla/DOMParser.html \
+                /_mozilla/mozilla/webgl/context_creation_error.html
+        """)
+        .create()
+    )
+
 
 
 def windows_dev():
@@ -199,6 +223,7 @@ def linux_run_task(name, build_task, script):
     return (
         linux_task(name)
         .with_dockerfile(dockerfile_path("run"))
+        .with_repo()
         .with_early_script("""
             ./etc/taskcluster/curl-artifact.sh ${BUILD_TASK_ID} target.tar.gz | tar -xz
         """)

etc/taskcluster/decisionlib.py

@@ -512,6 +512,7 @@ class DockerWorkerTask(Task):
         self.env = {}
         self.caches = {}
         self.features = {}
+        self.capabilities = {}
         self.artifacts = []
 
     with_docker_image = chaining(setattr, "docker_image")
@@ -521,6 +522,7 @@ class DockerWorkerTask(Task):
     with_early_script = chaining(prepend_to_attr, "scripts")
     with_caches = chaining(update_attr, "caches")
     with_env = chaining(update_attr, "env")
+    with_capabilities = chaining(update_attr, "capabilities")
 
     def build_worker_payload(self):
         """
@@ -541,6 +543,7 @@ class DockerWorkerTask(Task):
             env=self.env,
             cache=self.caches,
             features=self.features,
+            capabilities=self.capabilities,
             artifacts={
                 "public/" + url_basename(path): {
                     "type": "file",

etc/taskcluster/docker/run-android-emulator.dockerfile

@@ -0,0 +1,11 @@
+% include base.dockerfile
+
+RUN \
+    apt-get install -qy --no-install-recommends \
+        #
+        # Multiple Android-related tools are in Java
+        openjdk-8-jdk-headless \
+        #
+        # Emulator dependencies
+        libgl1 \
+        libpulse0