fs := fakes.NewFakeFileSystem() err := fs.WriteFile("/tmp/foo.txt", []byte("bar"), 0666) if err != nil { // handle error } content, err := fs.ReadFile("/tmp/foo.txt") if err != nil { // handle error } fmt.Println(string(content)) // Output: "bar"This code snippet demonstrates how to use the FakeFileSystem's WriteFile method to write a file with content "bar" to the path "/tmp/foo.txt". The file is then read and its content is printed to stdout.