test: x-caddy extension parsing

pkg/client/compose/caddy_test.go

@@ -0,0 +1,123 @@
+package compose
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCaddyExtension(t *testing.T) {
+	tests := []struct {
+		name           string
+		composeYAML    string
+		expectedConfig string
+		wantErr        bool
+	}{
+		{
+			name: "x-caddy as string",
+			composeYAML: `
+services:
+  web:
+    image: nginx
+    x-caddy: |
+      example.com {
+        reverse_proxy web:80
+      }
+`,
+			expectedConfig: `example.com {
+  reverse_proxy web:80
+}
+`,
+		},
+		{
+			name: "x-caddy as object with config field",
+			composeYAML: `
+services:
+  web:
+    image: nginx
+    x-caddy:
+      config: |
+        example.com {
+          reverse_proxy web:80
+        }
+`,
+			expectedConfig: `example.com {
+  reverse_proxy web:80
+}
+`,
+		},
+
+		{
+			name: "x-caddy with empty object",
+			composeYAML: `
+services:
+  web:
+    image: nginx
+    x-caddy: {}
+`,
+			expectedConfig: "",
+		},
+		{
+			name: "x-caddy with empty string",
+			composeYAML: `
+services:
+  web:
+    image: nginx
+    x-caddy: ""
+`,
+			expectedConfig: "",
+		},
+		{
+			name: "x-caddy with extra unknown field should fail",
+			composeYAML: `
+services:
+  web:
+    image: nginx
+    x-caddy:
+      config: |
+        example.com {
+          reverse_proxy web:80
+        }
+      unknown_field: "should cause error"
+`,
+			wantErr: true,
+		},
+		{
+			name: "x-caddy with non-string config field should fail",
+			composeYAML: `
+services:
+  web:
+    image: nginx
+    x-caddy:
+      config: 123
+`,
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			project, err := loadProjectFromContent(t, tt.composeYAML)
+
+			if tt.wantErr {
+				require.Error(t, err, "expected error for test case with invalid extension")
+				return
+			}
+
+			require.NoError(t, err)
+
+			service, err := project.GetService("web")
+			require.NoError(t, err)
+
+			// Verify the x-caddy extension was parsed correctly.
+			caddyExt, ok := service.Extensions[CaddyExtensionKey]
+			require.True(t, ok, "x-caddy extension not found")
+
+			caddy, ok := caddyExt.(Caddy)
+			require.True(t, ok, "x-caddy extension is not Caddy type")
+
+			assert.Equal(t, tt.expectedConfig, caddy.Config)
+		})
+	}
+}