feat: dev mode on client, check client configuration (#41)

* fix: tests

* fix: tests

* fix: tests

pkg/op/client.go

@@ -1,6 +1,9 @@
 package op
 
-import "time"
+import (
+	"github.com/caos/oidc/pkg/oidc"
+	"time"
+)
 
 const (
 	ApplicationTypeWeb ApplicationType = iota
@@ -16,16 +19,27 @@ type Client interface {
 	RedirectURIs() []string
 	PostLogoutRedirectURIs() []string
 	ApplicationType() ApplicationType
-	GetAuthMethod() AuthMethod
+	AuthMethod() AuthMethod
+	ResponseTypes() []oidc.ResponseType
 	LoginURL(string) string
 	AccessTokenType() AccessTokenType
 	IDTokenLifetime() time.Duration
+	DevMode() bool
 }
 
 func IsConfidentialType(c Client) bool {
 	return c.ApplicationType() == ApplicationTypeWeb
 }
 
+func ContainsResponseType(types []oidc.ResponseType, responseType oidc.ResponseType) bool {
+	for _, t := range types {
+		if t == responseType {
+			return true
+		}
+	}
+	return false
+}
+
 type ApplicationType int
 
 type AuthMethod string