Configuration: recover test reports (#2420)

.github/workflows/build.yml

@@ -25,3 +25,17 @@ jobs:
     - name: Build
       working-directory: arrow-libs
       run: ./gradlew build
+    - name: "Prepare test reports"
+      if: ${{ always() }}
+      run: |
+        mkdir test-reports
+        for report in `ls -d arrow-libs/**/**/build/reports/tests`; do
+          module=$(echo $report | cut -d/ -f3)
+          cp -r $report test-reports/$module
+        done
+    - name: "Make test reports available to download"
+      if: ${{ always() }}
+      uses: actions/upload-artifact@v1
+      with:
+        name: test-reports
+        path: test-reports