testbundle

Documentation

Overview

Package testbundle writes small, sparse, contract-shaped bundle directories for unit and acceptance tests.

Index

• Constants
• Variables
• func Write(dir string, o Options) error
• type Options

Constants

const ContractSize = 2*spec.ChunkSize + spec.ChunkSize/2

ContractSize is 1.25 GiB: two full chunks (the second all zero with the default DataAt) and a short third chunk.

Variables

var ErrOptions = errors.New("testbundle: invalid options")

ErrOptions reports unusable options.

Functions

func Write

func Write(dir string, o Options) error

Write creates dir and writes a bundle into it.

Types

type Options

type Options struct {
	OS   string // darwin, windows or linux
	Arch string // arm64 or amd64
	// Size is the disk0 logical size; default 8 MiB (one short chunk). Use
	// ContractSize for a disk with full 512 MiB chunks and a zero chunk.
	Size int64
	// DataAt lists offsets where 64 KiB of pseudo-random data is written;
	// default puts data in the first and last chunk so the middle chunk is zero.
	DataAt []int64
	// ExtraDisk adds a 1 MiB all-zero data disk named disk1 (one zero chunk).
	ExtraDisk bool
	// Seed makes the data deterministic.
	Seed uint64
	// Version is the org.opencontainers.image.version annotation.
	Version string
}

Options describe the bundle to write.