Add Mocking Requests With Partial URIs Using Regex as a ruby til

ruby/mocking-requests-with-partial-uris-using-regex.md

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+# Mocking Requests With Partial URIs Using Regex
+
+Generally when mocking out requests with the
+[webmock](https://github.com/bblimke/webmock) gem, we specify full request
+URIs like so:
+
+```ruby
+stub_request(:post, 'http://localhost:4000/api/posts')
+```
+
+We may not want to specify the entire URI though. For instance, the host may
+change or be configurable. The `stub_request` method allows us to use regex.
+
+```ruby
+stub_request(:post, %r|/api/posts|)
+```
+
+Using the `%r` regex literal syntax, we are able to avoid escaping all of
+the `/` characters in our URI.
+
+h/t Brian Dunn