Add Skip A Specific Test as an elixir til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_790 TILs and counting..._
+_791 TILs and counting..._
 
 ---
 
@@ -160,6 +160,7 @@ _790 TILs and counting..._
 - [Run ExUnit Tests In A Deterministic Order](elixir/run-exunit-tests-in-a-deterministic-order.md)
 - [Run The Test At A Specific Line Number](elixir/run-the-test-at-a-specific-line-number.md)
 - [Same Functions Should Be Grouped Together](elixir/same-functions-should-be-grouped-together.md)
+- [Skip A Specific Test](elixir/skip-a-specific-test.md)
 - [String Interpolation With Just About Anything](elixir/string-interpolation-with-just-about-anything.md)
 - [Unique Indexes With Ecto](elixir/unique-indexes-with-ecto.md)
 - [Updating Values In A Map](elixir/updating-values-in-a-map.md)

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.