Add Select A Select By Selector as a rails til.

rails/select-a-select-by-selector.md

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+# Select A Select By Selector
+
+Generally when using Capybara to select from a `select` input, I reference it by its `name`
+which rails associates with the label:
+
+```ruby
+select("Charizard", from: "Pokemon")
+```
+
+However, not all forms are going to have a label paired with every `select`
+input. We don't want to let our test coverage suffer, so we are going to
+need a different way to select. Capybara allows us to chain `select` off a
+`find` like so:
+
+```ruby
+find('#pokemon_list').select('Charizard')
+```