From 63a8706dcec0c933e093aec5ae35a84ca347a0b6 Mon Sep 17 00:00:00 2001
From: Brady Wied <wied03@users.noreply.github.com>
Date: Wed, 30 Mar 2016 13:27:23 -0600
Subject: [PATCH] Explain RSpec config options [skip ci]

Will still work with RSpec runner/config code runs
---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 73653cd1..8e4709d8 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,17 @@ To mutation test Rails models with rspec comment out ```require 'rspec/autorun'`
 RAILS_ENV=test bundle exec mutant -r ./config/environment --use rspec User
 ```
 
+Passing in RSpec Options
+------------------------
+
+**NOTE: Experimental**
+
+You can control some aspects of RSpec using the `SPEC_OPTS` environment variable as usual. If you want mutant to only pay attention to specs in a certain directory, you can run
+
+```sh
+SPEC_OPTS="--pattern spec/subdir_only/**/*_spec.rb" mutant --use rspec SomeClass
+```
+
 Limitations
 -----------