Add Skip A Specific Test as an elixir til

elixir/skip-a-specific-test.md

@@ -0,0 +1,19 @@
+# Skip A Specific Test
+
+Elixir's `ExUnit` supports all kinds of tags for customizing the behavior of
+your test suite. The `:skip` tag signals that `ExUnit` should skip over that
+specific test.
+
+```elixir
+@tag :skip
+test "this is a test that should not run" do
+  assert false
+end
+```
+
+When you run `mix test`, it will make sure to not execute any tests with the
+`:skip` tag.
+
+Using the `:skip` tag can be a great temporary measure in a lot of
+situations. It is not a good long-term practice to keep these around and
+check them in.