ExUnit.Let

If you're coming from RSpec, you might be missing let. This is kind of like that, but also not at all.

ExUnit.Let is a really tiny shorthand for setup. It allows you to test like this:

defmodule MyTest do
  use ExUnit.Case
  use ExUnit.Let

  let :a, do: 1
  let :b, %{a: a}, do: a + 1

  test "a", %{a: a} do
    assert a == 1
  end

  test "b", %{b: b} do
    assert b == 2
  end
end

Basically, the examples above just boil down to this:

setup do: [a: 1]
setup %{a: a}, do: [a + 1]

It's not buying you much other than visual greppability.

Installation

If available in Hex, the package can be installed as:

1. Add ex_unit_let to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:ex_unit_let, "~> 0.1.0"}]
end
```

1. Ensure ex_unit_let is started before your application:

```elixir
def application do
  [applications: [:ex_unit_let]]
end
```