You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: yaml_docs_test.go
    path of file: ./repos/minicron/client/vendor/github.com/spf13/cobra/doc
    
    the code of the file until where you have to start completion: package doc

import (
	"bytes"
	"io/ioutil"
	"os"
	"path/file
    
func TestGenYamlTree(t *testing.T) {
	cmd := &cobra.Command{
		Use: "do [OPTIONS] arg1 arg2",
	}

	tmpdir, err := ioutil.TempDir("", "test-gen-yaml-tree")
	if err != nil {
		t.Fatalf("Failed to create tmpdir: %s", err.Error())
	}
	defer os.RemoveAll(tmpdir)

	if err := GenYamlTree(cmd, tmpdir); err != nil {
		t.Fatalf("GenYamlTree failed: %s", err.Error())
	}

	if _, err := os.Stat(filepath.Join(tmpdir, "do.yaml")); err != nil {
		t.Fatalf("Expected file 'do.yaml' to exist")
	}
}