ci: add tests to check output filename

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
   test_simple:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
     name: "Test: Simple"
     runs-on: ${{ matrix.os }}
     steps:
@@ -26,7 +26,7 @@ jobs:
   test_filename:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
     name: "Test: With the filename"
     runs-on: ${{ matrix.os }}
     steps:
@@ -42,3 +42,24 @@ jobs:
 
       - name: Display the file
         run: head -n8 public/api-result.json
+
+  test_output_filename:
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, ubuntu-22.04]
+    name: "Test: Check the output filename"
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: suisei-cn/actions-download-file@master
+        id: downloadfile
+        name: Download a file
+        with:
+          url: "[API Endpoint](https://api.github.com/repos/suisei-cn/actions-download-file)"
+          target: public/
+          auto-match: true
+      - name: Check output filename
+        run: "[ 'actions-download-file' = '${{ steps.downloadfile.outputs.filename }}' ] && echo 'OK' || exit 1"
+
+      - name: Display the file
+        run: head -n8 public/api-result.json