Validate username site settings

spec/components/validators/email_setting_validator_spec.rb

@@ -0,0 +1,18 @@
+require 'spec_helper'
+
+describe EmailSettingValidator do
+  describe '#valid_value?' do
+    it "returns true for blank values" do
+      described_class.valid_value?('').should == true
+      described_class.valid_value?(nil).should == true
+    end
+
+    it "returns true if value is a valid email address" do
+      described_class.valid_value?('vader@example.com').should == true
+    end
+
+    it "returns false if value is not a valid email address" do
+      described_class.valid_value?('my house').should == false
+    end
+  end
+end

spec/components/validators/username_setting_validator_spec.rb

@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+describe UsernameSettingValidator do
+  describe '#valid_value?' do
+    it "returns true for blank values" do
+      described_class.valid_value?('').should == true
+      described_class.valid_value?(nil).should == true
+    end
+
+    it "returns true if value matches an existing user's username" do
+      Fabricate(:user, username: 'vader')
+      described_class.valid_value?('vader').should == true
+    end
+
+    it "returns false if value does not match a user's username" do
+      described_class.valid_value?('no way').should == false
+    end
+  end
+end