add specs for :inline_css option for transmission

spec/inline_css_spec.rb

@@ -0,0 +1,49 @@
+require 'spec_helper'
+
+describe SparkPostRails::DeliveryMethod do
+
+  before(:each) do
+    SparkPostRails.configuration.set_defaults
+    @delivery_method = SparkPostRails::DeliveryMethod.new
+  end
+
+  context "Inline css" do
+    it "handles inline_css set in the configuration" do
+      SparkPostRails.configure do |c|
+        c.inline_css = true
+      end
+
+      test_email = Mailer.test_email
+      @delivery_method.deliver!(test_email)
+
+      expect(@delivery_method.data[:options][:inline_css]).to eq(true)
+    end
+
+    it "handles inline_css set on an individual message" do
+      test_email = Mailer.test_email sparkpost_data: {inline_css: true}
+
+      @delivery_method.deliver!(test_email)
+
+      expect(@delivery_method.data[:options][:inline_css]).to eq(true)
+    end
+
+    it "handles the value on an individual message overriding configuration" do
+      SparkPostRails.configure do |c|
+        c.inline_css = false
+      end
+
+      test_email = Mailer.test_email sparkpost_data: {inline_css: true}
+
+      @delivery_method.deliver!(test_email)
+
+      expect(@delivery_method.data[:options][:inline_css]).to eq(true)
+    end
+
+    it "handles a default setting of inline_css" do
+      test_email = Mailer.test_email
+      @delivery_method.deliver!(test_email)
+
+      expect(@delivery_method.data[:options][:inline_css]).to eq(false)
+    end
+  end
+end