Add bash scripts to run instrumentation tests concurrently

firebase-run-test.sh

@@ -0,0 +1,25 @@
+# Takes 2 argument:
+# $1: the test(s) name.
+# $2: the output file where the result code will be written.
+
+# ================= Simulating testing code =================
+echo "testing $1 ..."
+sleep 5
+
+echo "$?" >> "$2"     # The return code of the `sleep` cmd (simulating test cmd).`
+# ============================================================
+
+# ================= Actual testing code =================
+#echo "y" | gcloud beta firebase test android run \
+#--app app/build/outputs/apk/mock/debug/app-mock-debug.apk \                                # To be filled with actual path
+#--test app/build/outputs/apk/androidTest/mock/debug/app-mock-debug-androidTest.apk \       # To be filled with actual path
+#--device model=Nexus5,version=19,locale=en,orientation=portrait \
+#--device model=Nexus6,version=21,locale=en,orientation=portrait \
+#--device model=Nexus6P,version=23,locale=en,orientation=portrait \
+#--use-orchestrator \
+#--timeout 30m \
+#--results-bucket "my-bucket" \                                                             # To be filled with actual argument
+#--test-targets="$1";
+
+#echo "$?" >> "$2"     # The return code of Firebase cmd `gcloud beta firebase test...`
+# ============================================================

firebase-run-tests-concurrently.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Takes 1 argument:
+# $1: file containing tests, one test case per line.
+
+CORES_COUNT=`cat /proc/cpuinfo | grep processor | wc -l`
+PARALLEL_JOBS=$((CORES_COUNT > 16 ? CORES_COUNT : 16)) # at least 16 parallel jobs
+TESTS_COUNT=`wc -l < $1`
+TESTS_PER_JOB=$(( (TESTS_COUNT + PARALLEL_JOBS - 1) / PARALLEL_JOBS )) # round up division
+
+# Pre-process input test file
+# Prepend "class " to each line, then concat each "$TESTS_PER_JOB" lines to be comma separated to be executed in 1 run.
+cat "$1" | while read line; do echo "class $line"; done | paste -d, $(for i in `seq 1 $TESTS_PER_JOB`; do printf "%b" "- "; done) > intermediate-test-file
+sed 's/,*$//' intermediate-test-file > batch-test-file # Remove trailing commas, if any, at the end of  each line
+
+# Run tests simultaneously
+echo y | apt-get install parallel	# Install GNU parallel tool
+TESTS_RESULT_FILE="result-file"
+cat batch-test-file | parallel -j0 "bash firebase-run-test.sh {} $TESTS_RESULT_FILE" # "-j0" run as many jobs as needed
+
+# Check overall result of all tests
+OVERALL_TESTS_RESULT=`awk '{s+=$1} END {print s}' $TESTS_RESULT_FILE` # Sum result codes all test cmds
+echo "The result of running all tests is $OVERALL_TESTS_RESULT"