Fix issue with balanced tests (#1384)

Author: wind57

.github/workflows/composites/run-and-save-test-times-when-cache-present/action.yaml

@@ -90,7 +90,7 @@ runs:
         max_test_time_as_int=$(printf "%.0f\n" "$max_test_time")
         echo "max test time : $max_test_time_as_int"
 
-        number_of_instances=$((  $sum_of_all_tests_as_int / $max_test_time_as_int  ))
+        number_of_instances=${NUMBER_OF_JOBS}
         echo "number of instances $number_of_instances"
 
         average_time_per_instance=$((  sum_of_all_tests_as_int / number_of_instances  ))
@@ -133,6 +133,15 @@ runs:
               echo "current index : ${CURRENT_INDEX}"
               tests_to_run_in_current_index=$tests_to_take_in_current_iteration
               echo "time of tests in current index : $sum"
+              
+              # this can be the case when we delete some tests in some PR for example
+              # the previous cache will contain more tests then we currently have, so some 
+              # matrix instances will have no tests to run
+              if [[ "$sum" -eq "0" ]]; then
+                echo "no tests to run in current index, most probably this PR removed some tests"
+                tests_to_run_in_current_index='none'
+              fi
+              
             fi
 
         done
@@ -188,13 +197,18 @@ runs:
             unset IFS
 
             for i in "${sliced_array[@]}"; do
-              filename="${i}.txt"
-              echo "searching for filename: ${filename}"
-              file=$(find . -name "${filename}")
-              echo "found file: ${file}"
-              result=$(cat "${file}" | grep 'elapsed' | awk '{print $12, $13}')
-        
-              echo "run test: ${i} in : ${result}" >> /tmp/test_times_${{ env.CURRENT_INDEX }}.txt
+              
+              # can be present in the last index as 'none,testA,testB'
+              if [[ "$i" -eq "none" ]]; then
+                echo "skipping 'none'"
+              else
+                filename="${i}.txt"
+                echo "searching for filename: ${filename}"
+                file=$(find . -name "${filename}")
+                echo "found file: ${file}"
+                result=$(cat "${file}" | grep 'elapsed' | awk '{print $12, $13}')
+                echo "run test: ${i} in : ${result}" >> /tmp/test_times_${{ env.CURRENT_INDEX }}.txt
+              fi
             done
         fi
 

.github/workflows/maven.yaml

@@ -123,6 +123,7 @@ jobs:
       SEGMENT_DOWNLOAD_TIMEOUT_MINS: 30
     # only run this one if there is a previous cache of test times
     if: needs.build.outputs.test_times_cache_present == 'true'
+    timeout-minutes: 60
 
     strategy:
       fail-fast: true