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: multi_blocks_test.go
    path of file: ./repos/client/go/kbfs/test
    
    the code of the file until where you have to start completion: // Copyright 2016 Keybase Inc. All rights reserv
    
func TestSwitchToMultiblockFile(t *testing.T) {
	test(t,
		blockSize(20), users("alice", "bob"),
		as(alice,
			// Fill up the first block (a desired encrypted block size
			// of 20 ends up with a plaintext size of 12).
			write("a/b", ntimesString(3, "0123")),
			// Then append to the end of the file to force a split.
			pwriteBS("a/b", []byte(ntimesString(3, "0123")), 12),
		),
		as(bob,
			read("a/b", ntimesString(6, "0123")),
		),
	)
}