[NiA] Run instrumented tests on Firebase Test Lab

Change-Id: I7f69fb9ad013e1411cf97a90c778cda138f792e2

kokoro/build.sh

@@ -20,6 +20,9 @@ set -e
 # Display commands to stderr.
 set -x
 
+deviceIds=${1:-'Nexus5,Pixel2,Pixel3'}
+osVersionIds=${2:-'23,27,30'}
+
 GRADLE_FLAGS=()
 if [[ -n "$GRADLE_DEBUG" ]]; then
   GRADLE_FLAGS=( --debug --stacktrace )
@@ -41,4 +44,32 @@ export JAVA_HOME=
 
 ./gradlew "${GRADLE_FLAGS[@]}" build
 
+# For Firebase Test Lab
+./gradlew app:assembleAndroidTest
+./gradlew app:assembleDebug
+
+MAX_RETRY=3
+run_firebase_test_lab() {
+  ## Retry can be done by passing the --num-flaky-test-attempts to gcloud, but gcloud SDK in the
+  ## kokoro server doesn't support it yet.
+
+  set +e # To not exit on an error to retry flaky tests
+  local counter=0
+  local result=1
+  while [ $result != 0 -a $counter -lt $MAX_RETRY ]; do
+    gcloud firebase test android run \
+      --type instrumentation \
+      --app  app/build/outputs/apk/debug/app-debug.apk \
+      --test app/build/outputs/apk/androidTest/debug/app-debug-androidTest.apk \
+      --device-ids $deviceIds \
+      --os-version-ids $osVersionIds \
+      --locales en \
+      --timeout 60
+    result=$? ;
+    let counter=counter+1
+  done
+  return $result
+}
+
+run_firebase_test_lab
 exit $?

kokoro/nightly.cfg

@@ -0,0 +1,2 @@
+# Location of the bash script.
+build_file: "nowinandroid/kokoro/nightly.sh"

kokoro/nightly.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Copyright 2021 Google LLC
+#
+# 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
+#
+#     https://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.
+
+
+# Fail on any error.
+set -e
+# Display commands to stderr.
+set -x
+
+# Run the normal build, but replace the default virtual devices with physical ones.
+# hammerhead  | Nexus 5       | API 23 | Phone
+# walleye     | Pixel 2       | API 27 | Phone
+# gts4lltevzw | Galaxy Tab S4 | API 28 | Tablet
+# a10         | Samsung A10   | API 29 | Phone
+# redfin      | Pixel 5e      | API 30 | Phone
+# oriole      | Pixel 6       | API 31 | Phone
+bash build.sh "hammerhead,walleye,gts4lltevzw,a10,redfin,oriole" "23,27,28,29,30,31"
+
+exit $?