Upstream sync master

spec/support/env_helper.rb

@@ -0,0 +1,16 @@
+module EnvHelper
+  def stub_env_variables(vars)
+    allow(ENV).to receive(:[]).and_call_original
+    vars.each do |variable, value|
+      allow(ENV).to receive(:[]).with(variable.to_s).and_return(value)
+    end
+  end
+
+  def stub_env_variable(key, value)
+    stub_env_variables({key => value})
+  end
+end
+
+RSpec.configure do |config|
+  config.include EnvHelper
+end