ci: Print slowest test cases (#2970)

Print the 20 slowest test cases after running unit tests.

.github/workflows/test.yml

@@ -204,6 +204,10 @@ jobs:
         # manipulating string in expressions.
         run: ./scripts/xcode-test.sh ${{matrix.platform}} ${{matrix.test-destination-os}} $GITHUB_REF_NAME ci test-without-building
 
+      - name: Slowest Tests
+        if: ${{ always() }}
+        run: ./scripts/xcode-slowest-tests.sh
+
       - name: Archiving DerivedData Logs
         uses: actions/upload-artifact@v3
         if: failure()

Makefile

@@ -45,6 +45,7 @@ GIT-REF := $(shell git rev-parse --abbrev-ref HEAD)
 test:
 	@echo "--> Running all tests"
 	./scripts/xcode-test.sh iOS latest $(GIT-REF) YES
+	./scripts/xcode-slowest-tests.sh
 .PHONY: test
 
 run-test-server:

scripts/xcode-slowest-tests.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Finds the x amount of slowest test cases in the raw-test-output.log file.
+# Logic copied from https://stanislaw.github.io/2016/08/04/how-to-find-the-slowest-xctest.html.
+
+RAW_TEST_OUTPUT_LOG=${1:-raw-test-output.log}
+NUMBER_OF_SLOWEST_TEST="${2:-20}"
+
+echo "The $NUMBER_OF_SLOWEST_TEST slowest test cases:" 
+cat $RAW_TEST_OUTPUT_LOG | grep 'Test\ Case.*seconds' | awk -F '[()]' '{print $2 " -> " $1}' | sort -rn | head -n $NUMBER_OF_SLOWEST_TEST