)

type usageTestFile struct {
	name string
	size int
}

func TestDataUsageUpdate(t *testing.T) {
	base := t.TempDir()
	const bucket = "bucket"
	files := []usageTestFile{
		{name: "rootfile", size: 10000},
		{name: "rootfile2", size: 10000},
		{name: "dir1/d1file", size: 2000},
		{name: "dir2/d2file", size: 300},
		{name: "dir1/dira/dafile", size: 100000},
		{name: "dir1/dira/dbfile", size: 200000},

	i := strings.LastIndexByte(name, '/')
	if i < 0 {
		return ".", name, isDir
	}
	return name[:i], name[i+1:], isDir
}

var dotFile = &fileListEntry{name: "./", isDir: true}

func (r *Reader) openLookup(name string) *fileListEntry {
	if name == "." {
		return dotFile
	}

	dir, elem, _ := split(name)
	files := r.fileList

 [PostFileJava]: https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PostFile.java
 [PostFileKotlin]: https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/kt/PostFile.kt
 [PostFormJava]: https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PostForm.java