Add a workflow that tests the action.

Author: afinetooth

Diff for: .github/workflows/test.yml

@@ -0,0 +1,89 @@
+name: Test GitHub Action
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test-action:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        action: [install, report, done]
+        fail_on_error: [true, false]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up environment
+        if: matrix.os == 'ubuntu-latest'
+        shell: bash
+        run: |
+          echo "Running on Linux"
+      - name: Set up environment
+        if: matrix.os == 'macos-latest'
+        shell: bash
+        run: |
+          echo "Running on macOS"
+      - name: Set up environment
+        if: matrix.os == 'windows-latest'
+        shell: pwsh
+        run: |
+          echo "Running on Windows"
+
+      - name: Run Test Action
+        uses: ./
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          fail-on-error: ${{ matrix.fail_on_error }}
+          debug: true
+        env:
+          CI: true
+
+      - name: Simulate Failure Scenarios
+        if: ${{ matrix.action == 'install' }}
+        shell: ${{ startsWith(matrix.os, 'windows') && 'pwsh' || 'bash' }}
+        run: |
+          # Fail download step intentionally
+          echo "Testing download failure scenario"
+          exit 1  # Simulate download failure
+
+      - name: Simulate Report Command Failure
+        if: ${{ matrix.action == 'report' }}
+        shell: ${{ startsWith(matrix.os, 'windows') && 'pwsh' || 'bash' }}
+        run: |
+          echo "Testing report command failure"
+          ~/bin/coveralls report  # Simulated failure
+
+      - name: Simulate Done Command Failure
+        if: ${{ matrix.action == 'done' }}
+        shell: ${{ startsWith(matrix.os, 'windows') && 'pwsh' || 'bash' }}
+        run: |
+          echo "Testing done command failure"
+          ~/bin/coveralls done  # Simulated failure
+
+      - name: Verify Outcome
+        shell: ${{ startsWith(matrix.os, 'windows') && 'pwsh' || 'bash' }}
+        run: |
+          if [[ "${{ matrix.fail_on_error }}" == "true" ]]; then
+            # Expect failure exit code
+            if [[ $? -eq 0 ]]; then
+              echo "Test failed: expected failure but action succeeded."
+              exit 1
+            else
+              echo "Test succeeded: expected failure and action failed as expected."
+            fi
+          else
+            # Expect success exit code
+            if [[ $? -ne 0 ]]; then
+              echo "Test failed: expected success but action failed."
+              exit 1
+            else
+              echo "Test succeeded: expected success and action succeeded."
+            fi
+          fi