feat: panic on invalid path param name

operation.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net/http"
 	"reflect"
+	"strings"
 	"time"
 
 	"github.com/Jeffail/gabs/v2"
@@ -146,6 +147,15 @@ func (o *Operation) Run(handler interface{}) {
 
 		// Get parameters
 		o.params = getParamInfo(input)
+		for k, v := range o.params {
+			if v.In == inPath {
+				// Confirm each declared input struct path parameter is actually a part
+				// of the declared resource path.
+				if !strings.Contains(o.resource.path, "{"+k+"}") {
+					panic(fmt.Errorf("Parameter '%s' not in URI path: %s", k, o.resource.path))
+				}
+			}
+		}
 
 		// Get body if present.
 		if body, ok := input.FieldByName("Body"); ok {

router_test.go

@@ -221,3 +221,19 @@ func TestErrorHandlers(t *testing.T) {
 	assert.Equal(t, "application/problem+json", w.Header().Get("Content-Type"))
 	assert.Contains(t, w.Body.String(), "PUT")
 }
+
+func TestInvalidPathParam(t *testing.T) {
+	type Input struct {
+		ThingID string `path:"thing-if"`
+	}
+
+	app := newTestRouter()
+
+	assert.Panics(t, func() {
+		app.Resource("/things", "thing-id").Get("get", "Test",
+			NewResponse(http.StatusNoContent, "desc"),
+		).Run(func(ctx Context, input Input) {
+			// Do nothing
+		})
+	})
+}