eksperimental
Idiomatic way to assert on one of several values in ExUnit
Hi everyone.
Does anybody know if there is an idiomatic way of doing a pattern matching on a list of assertions
I am trying to do this.
assert (case git_short_commit do
"" -> true
<<_::8*7>> -> true
_ -> false
end)
Thank you.
Marked As Solved
lud
I’m not sure it would be useful in this case, but there is the flunk function:
(by the way, what is this “$”? Is it a typo?)
case stuff do
"" -> assert true
<<_::8*7>> -> assert true
_ -> flunk("the variable was not an empty string or a 7 byte binary")
end
Also Liked
LostKobrakai
Or switch the assert method around:
case value do
... -> :ok
... -> :ok
_ -> flunk "Invalid value"
end
eahanson
This one might be more intention-revealing:
blank? = (git_short_commit == "")
seven_bytes? = match?(<<_::8*7>>, git_short_commit)
assert blank? || seven_bytes?, "git short commits must be 7 bytes long (or blank), got: #{git_short_commit}"
derek-zhou
I will just do:
assert valid_commit?(git_short_commit)
...
defp valid_commit?(""), do: true
defp valid_commit?(<<_::8*7>>), do: true
defp valid_commit?(_), do: false
jeroenvisser101
Not sure if this is any better?
assert $git_short_commit == "" or match?(<<_::8*7>>, $git_short_commit)
eksperimental
It’s a PHP variable that made its way into Elixir! 
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