merkle_patricia_tree v0.2.5 MerklePatriciaTree.Test

Helper functions related to creating a MerklePatriciaTree database in :ets or :leveldb. This is to be used when you need to have a persisted table for a test case, which is basically any test that involves these tables. The tables generated by this module are supposed to be exceedingly temporary.

Link to this section Summary

Functions

random_atom(length)

Returns a semi-random atom, similar to random_string/1, but is an atom. This is obviously not to be used in production since atoms are not garbage collected

random_ets_db(name \\ nil)

Returns a random :ets database suitable for testing

random_string(length)

Returns a semi-random string of length length that can be represented by alphanumeric characters

Link to this section Functions

random_atom(length)

Returns a semi-random atom, similar to random_string/1, but is an atom. This is obviously not to be used in production since atoms are not garbage collected.

Examples

iex> MerklePatriciaTree.Test.random_atom(20) |> is_atom
true

iex> MerklePatriciaTree.Test.random_atom(20) |> Atom.to_string |> String.length
20

iex> MerklePatriciaTree.Test.random_atom(20) == MerklePatriciaTree.Test.random_atom(20)
false

random_ets_db(name \\ nil)

Returns a random :ets database suitable for testing

Examples

iex> {MerklePatriciaTree.DB.ETS, db_ref} = MerklePatriciaTree.Test.random_ets_db()
iex> :ets.info(db_ref)[:type]
:set

iex> {MerklePatriciaTree.DB.ETS, db_ref} = MerklePatriciaTree.Test.random_ets_db(:test1)
iex> :ets.info(db_ref)[:name]
:test1

random_string(length)

Returns a semi-random string of length length that can be represented by alphanumeric characters.

Adopted from https://stackoverflow.com/a/32002566.

Examples

iex> MerklePatriciaTree.Test.random_string(20) |> is_binary
true

iex> String.length(MerklePatriciaTree.Test.random_string(20))
20

iex> MerklePatriciaTree.Test.random_string(20) == MerklePatriciaTree.Test.random_string(20)
false