Test install

Author: nobu

.github/workflows/test.yml

@@ -56,6 +56,10 @@ jobs:
       run: |
         rake build
         echo "pkg=${GITHUB_REPOSITORY#*/}-${PLATFORM:-${RUNNING_OS%-*}}" >> $GITHUB_OUTPUT
+        if [ -z "${PLATFORM}" ]; then
+          set -- pkg/*[0-9].gem
+          echo "gem=$1" >> $GITHUB_OUTPUT
+        fi
       env:
         RUNNING_OS: ${{matrix.os}}
         PLATFORM: ${{ startsWith(matrix.ruby, 'jruby') && 'java' || '' }}
@@ -65,6 +69,26 @@ jobs:
         (matrix.ruby == needs.ruby-versions.outputs.latest || matrix.ruby == 'jruby-head')
         }}
       shell: bash
+
+    - name: Install package
+      run: gem install ${{ steps.build.outputs.gem }}
+      if: ${{ steps.build.outputs.gem }}
+
+    - name: Install gperf
+      id: gperf
+      run: >-
+        ${{ case(
+          startsWith(matrix.os, 'ubuntu'), 'apt',
+          startsWith(matrix.os, 'macos'), 'brew',
+          startsWith(matrix.os, 'windows', 'choco'
+          'false'
+        ) }} install gperf
+      if: ${{ steps.build.outputs.gem }}
+
+    - name: Install package
+      run: gem install ${{ steps.build.outputs.gem }}
+      if: ${{ steps.build.outputs.gem }}
+
     - name: Upload package
       uses: actions/upload-artifact@v7
       with: