[no-relnote] add unit tests for cmd/nvidia-ctk/runtime/configure

Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>

Author: ArangoGutierrez

cmd/nvidia-ctk/runtime/configure/configure.go

@@ -250,7 +250,7 @@ func (m command) validateFlags(config *config) error {
 		}
 	}
 
-	if config.dropInConfigPath == "" && (config.runtime == "containerd" || config.runtime == "crio") {
+	if config.dropInConfigPath == "" {
 		switch config.runtime {
 		case "containerd":
 			config.dropInConfigPath = defaultContainerdDropInConfigFilePath
@@ -263,6 +263,10 @@ func (m command) validateFlags(config *config) error {
 		return fmt.Errorf("the drop-in-config path %q is not an absolute path", config.dropInConfigPath)
 	}
 
+	if config.dropInConfigPath != "" && config.runtime == "docker" {
+		return fmt.Errorf("runtime %v does not support drop-in configs", config.runtime)
+	}
+
 	return nil
 }