neiam /gitgud

defmodule GitGud.Workflows.RefTest do
  @moduledoc """
  The ref parsing three places used to do separately.

  `github.ref_type` being absent from the runner context is what made a
  release workflow take its "not a tag" branch on a tag push and report
  success for publishing nothing, so the spellings here are GitHub's — a
  workflow copied from its documentation compares against exactly these
  strings.
  """
  use ExUnit.Case, async: true

  doctest GitGud.Workflows.Ref

  alias GitGud.Workflows.Ref

  describe "name/1" do
    test "strips the ref prefix" do
      assert Ref.name("refs/heads/master") == "master"
      assert Ref.name("refs/tags/v0.1.0") == "v0.1.0"
    end

    test "keeps a slash inside the name" do
      assert Ref.name("refs/heads/topic/thing") == "topic/thing"
    end

    test "passes anything else through rather than blanking it" do
      assert Ref.name("HEAD") == "HEAD"
      assert Ref.name(nil) == ""
    end
  end

  describe "type/1" do
    test "is GitHub's spelling" do
      assert Ref.type("refs/heads/master") == "branch"
      assert Ref.type("refs/tags/v0.1.0") == "tag"
    end

    test "is empty for a ref that is neither" do
      assert Ref.type("refs/pull/7/head") == ""
      assert Ref.type(nil) == ""
    end
  end

  describe "context/1" do
    test "names the one key the filters look at" do
      assert Ref.context("refs/heads/master") == %{branch: "master"}
      assert Ref.context("refs/tags/v0.1.0") == %{tag: "v0.1.0"}
    end

    # A context that guessed would make `branches:` and `tags:` filters
    # decide on a ref that is neither; an empty one filters on nothing.
    test "is empty for a ref that is neither" do
      assert Ref.context("refs/pull/7/head") == %{}
      assert Ref.context(nil) == %{}
    end
  end
end