Add test(s) for caddy (#34470)

🤖 generated for as part of [expanding package test
coverage](#13623)

Signed-off-by: Josh Wolf <[email protected]>

caddy.yaml

@@ -60,8 +60,102 @@ update:
     use-tag: true
 
 test:
+  environment:
+    contents:
+      packages:
+        - curl
+        - netcat-openbsd
+        - procps
+        - coreutils
   pipeline:
-    # AUTOGENERATED
-    - runs: |
+    - name: "Verify binary and version"
+      runs: |
+        caddy version
         caddy --version
-        caddy --help
+    - name: "Check basic help output"
+      runs: |
+        caddy help
+        caddy list-modules
+    - name: "Test basic HTTP server"
+      uses: test/daemon-check-output
+      with:
+        setup: |
+          echo "http://localhost:2020 {
+            respond \"Hello, Wolfi!\"
+          }" > test.Caddyfile
+        start: caddy run --config test.Caddyfile
+        expected_output: "serving initial configuration"
+        error_strings: |
+          "msg":"error"
+          "level":"error"
+          "panic"
+          "fatal"
+          failed
+          Error:
+          error:
+          denied
+    - name: "Test static file serving"
+      uses: test/daemon-check-output
+      with:
+        setup: |
+          mkdir -p webroot
+          echo "Static Test" > webroot/test.txt
+          echo "http://localhost:2021 {
+            root * webroot
+            file_server
+          }" > static.Caddyfile
+        start: caddy run --config static.Caddyfile
+        expected_output: "serving initial configuration"
+        error_strings: |
+          "msg":"error"
+          "level":"error"
+          "panic"
+          "fatal"
+          failed
+          Error:
+          error:
+          denied
+        post: |
+          curl -s http://localhost:2021/test.txt | grep -q "Static Test"
+    - name: "Test module loading and functionality"
+      uses: test/daemon-check-output
+      with:
+        setup: |
+          cat <<EOF > modules.Caddyfile
+          http://localhost:2024 {
+            route /headers {
+              header Content-Type "text/plain"
+              respond "Headers Test"
+            }
+            route /reverse/* {
+              uri strip_prefix /reverse
+              reverse_proxy http://localhost:2024 {
+                header_up X-Real-IP {remote_host}
+              }
+            }
+            route /compress {
+              encode gzip
+              respond "Compression Test"
+            }
+          }
+          EOF
+        start: caddy run --config modules.Caddyfile
+        expected_output: "serving initial configuration"
+        error_strings: |
+          "msg":"error"
+          "level":"error"
+          "panic"
+          "fatal"
+          failed
+          Error:
+          error:
+          denied
+        post: |
+          # Test header module
+          curl -s -i http://localhost:2024/headers | grep -q "Content-Type: text/plain"
+
+          # Test reverse_proxy module
+          curl -s http://localhost:2024/reverse/headers | grep -q "Headers Test"
+
+          # Test compression module
+          curl -s -H "Accept-Encoding: gzip" http://localhost:2024/compress | grep -q "Compression Test"