Add integration test for ensuring that stale metrics files are deleted.

Bug: 286083726
Test: run the script
Change-Id: I2dd382b3a0ee1b226f4931fed3bc4b5df0a3528c

tests/run_integration_tests.sh

@@ -9,6 +9,7 @@ TOP="$(readlink -f "$(dirname "$0")"/../../..)"
 "$TOP/build/soong/tests/bp2build_bazel_test.sh"
 "$TOP/build/soong/tests/persistent_bazel_test.sh"
 "$TOP/build/soong/tests/soong_test.sh"
+"$TOP/build/soong/tests/stale_metrics_files_test.sh"
 "$TOP/build/bazel/ci/rbc_regression_test.sh" aosp_arm64-userdebug
 
 # The following tests build against the full source tree and don't rely on the

tests/stale_metrics_files_test.sh

@@ -0,0 +1,47 @@
+#!/bin/bash -e
+
+# This test ensures that stale metrics files are deleted after each run
+
+# Run bazel
+# Note - bp2build metrics are present after clean runs, only
+build/soong/soong_ui.bash --make-mode clean
+build/bazel/bin/b build libcore:all
+soong_build_metrics_files=("out/soong_build_metrics.pb" "out/build_progress.pb" "out/soong_metrics" "out/bp2build_metrics.pb")
+bazel_build_metrics_files=("out/bazel_metrics.pb" "out/build_progress.pb" "out/soong_metrics" "out/bp2build_metrics.pb")
+
+# Ensure bazel metrics files are present
+for i in ${!bazel_build_metrics_files[@]};
+do
+  file=${bazel_build_metrics_files[$i]}
+  if [[ ! -f $file ]]; then
+     echo "Missing metrics file for Bazel build " $file
+     exit 1
+  fi
+done
+
+
+# Run a soong build
+build/soong/soong_ui.bash --make-mode nothing
+
+for i in ${!soong_build_metrics_files[@]};
+do
+  file=${soong_build_metrics_files[$i]}
+  if [[ ! -f $file ]]; then
+     echo "Missing metrics file for Soong build " $file
+     exit 1
+  fi
+done
+
+# Ensure that bazel_metrics.pb is deleted
+if [[ -f out/bazel_metrics.pb ]]; then
+   echo "Stale out/bazel_metrics.pb file detected"
+   exit 1
+fi
+
+# Run bazel again - to make sure that soong_build_metrics.pb gets deleted
+build/bazel/bin/b build libcore:all
+
+if [[ -f out/soong_build_metrics.pb ]]; then
+   echo "Stale out/soong_build_metrics.pb file detected"
+   exit 1
+fi