Default debug to current runner debug state

When the action 'debug' input is not set, default to the current
runner debug state. This ensures that the Octokit client request logs
are included automatically when you re-run a job with debug enabled.

.github/workflows/integration.yml

@@ -187,7 +187,11 @@ jobs:
           echo $'\u2705 Test passed' | tee -a $GITHUB_STEP_SUMMARY
 
   test-debug:
-    name: 'Integration test: debug option'
+    strategy:
+      matrix:
+        environment: ['', 'debug-integration-test']
+    environment: ${{ matrix.environment }}
+    name: "Integration test: debug option (runner.debug mode ${{ matrix.environment && 'enabled' || 'disabled' }})"
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -204,6 +208,7 @@ jobs:
           script: |
             const log = github.log
             return {
+              runnerDebugMode: core.isDebug(),
               debug: log.debug === console.debug,
               info: log.info === console.info
             }
@@ -215,6 +220,7 @@ jobs:
           script: |
             const log = github.log
             return {
+              runnerDebugMode: core.isDebug(),
               debug: log.debug === console.debug,
               info: log.info === console.info
             }
@@ -226,26 +232,39 @@ jobs:
           script: |
             const log = github.log
             return {
+              runnerDebugMode: core.isDebug(),
               debug: log.debug === console.debug,
               info: log.info === console.info
             }
-      - run: |
-          echo "- Validating debug default"
-          expected='{debug:false,info:false}'
-          if [[ "${{steps.debug-default.outputs.result}}" != "$expected" ]]; then
-            echo $'::error::\u274C' "Expected '$expected', got ${{steps.debug-default.outputs.result}}"
-            exit 1
-          fi
-          echo "- Validating debug set to true"
-          expected='{debug:true,info:true}'
-          if [[ "${{steps.debug-true.outputs.result}}" != "$expected" ]]; then
-            echo $'::error::\u274C' "Expected '$expected', got ${{steps.debug-true.outputs.result}}"
-            exit 1
-          fi
-          echo "- Validating debug set to false"
-          expected='{debug:false,info:false}'
-          if [[ "${{steps.debug-false.outputs.result}}" != "$expected" ]]; then
-            echo $'::error::\u274C' "Expected '$expected', got ${{steps.debug-false.outputs.result}}"
-            exit 1
-          fi
+      - id: evaluate-tests
+        name: Evaluate test outputs
+        env:
+          RDMODE: ${{ runner.debug == '1' }}
+        run: |
+          # tests table, pipe separated: label | output | expected
+          # leading and trailing spaces on any field are trimmed
+          tests=$(cat << 'TESTS'
+            Validating debug default |\
+              ${{ steps.debug-default.outputs.result }} |\
+              {"runnerDebugMode":${{ env.RDMODE }},"debug":${{ env.RDMODE }},"info":${{ env.RDMODE }}}
+            Validating debug set to true |\
+              ${{ steps.debug-true.outputs.result }} |\
+              {"runnerDebugMode":${{ env.RDMODE }},"debug":true,"info":true}
+            Validating debug set to false |\
+              ${{ steps.debug-false.outputs.result }} |\
+              {"runnerDebugMode":${{ env.RDMODE }},"debug":false,"info":false}
+          TESTS
+          )
+
+          strim() { shopt -s extglob; lt="${1##+( )}"; echo "${lt%%+( )}"; }
+          while IFS='|' read label output expected; do
+            label="$(strim "$label")"; output="$(strim "$output")"; expected="$(strim "$expected")"
+            echo -n "- $label:"
+            if [[ "$output" != "$expected" ]]; then
+              echo $'\n::error::\u274C' "Expected '$expected', got '$output'"
+              exit 1
+            fi
+            echo $' \u2705'
+          done <<< "$tests"
+
           echo $'\u2705 Test passed' | tee -a $GITHUB_STEP_SUMMARY