test: add token asserts (#9)

action.yml

@@ -56,6 +56,12 @@ runs:
           fork=false
       fi
 
+      # Assert Github Token is set 
+      if [ -z "${{ github.token }}" ]; then
+          echo "Error: Github Token Secret not found"
+          exit 1
+      fi
+
       # Bot config
       git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
       git config --global user.name "github-actions[bot]"
@@ -77,17 +83,17 @@ runs:
       fi
 
       # Fetch hash of main branch
-      _hash_main=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+      _hash_main=$(curl -s -H "Authorization: token ${{ github.token }}" \
       "https://api.github.com/repos/${{ github.repository }}/commits/${{ github.base_ref }}" | jq -r '.sha')
 
       # Fetch hash of feature branch (via PR number, also works for branches from forks)
-      pr_details=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+      pr_details=$(curl -s -H "Authorization: token ${{ github.token }}" \
           "https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}")
       # Extract the repository and ref (branch name)
       source_repo=$(echo "$pr_details" | jq -r '.head.repo.full_name')
       branch_name=$(echo "$pr_details" | jq -r '.head.ref')
       # Get the latest commit hash from the source repository
-      _hash_feature=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+      _hash_feature=$(curl -s -H "Authorization: token ${{ github.token }}" \
           "https://api.github.com/repos/$source_repo/commits/$branch_name" | jq -r '.sha')
 
       echo "Main branch (${{ github.base_ref }}) hash: $_hash_main"
@@ -113,6 +119,15 @@ runs:
     # 'create-comment' step
     # ----------------------------------------
 
+  - name: Create comment specific setup and checks
+    if: ${{ inputs.step == 'create-comment' }}
+    run: |
+      # Assert validator key is set
+      if [ -z ${{ inputs.validator_key }} ]; then
+          echo "Error: input 'validator_key' not set"
+          exit 1
+      fi
+    shell: bash
 
   - name: Download artifacts
     if: ${{ inputs.step == 'create-comment' }}