Use SimpleCov

Also, add some tests for extra coverage

.gitignore

@@ -1,2 +1,3 @@
 config.yml
 Gemfile.lock
+coverage

ruby-wpdb.gemspec

@@ -31,6 +31,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'rspec', '~> 2.14'
   s.add_development_dependency 'rack-test', '~> 0.6'
+  s.add_development_dependency 'simplecov', '~> 0.8'
 
   s.add_development_dependency "guard", "~> 2.6"
   s.add_development_dependency "guard-rspec", "~> 4.2"

spec/lib/ruby-wpdb/gravityforms_spec.rb

@@ -19,9 +19,19 @@ module WPDB
       @form.leads.first.details.should_not be_empty
     end
 
+    it "gets the name of a field" do
+      @form.stub(:fields).and_return(sample_fields)
+      @form.field_name(1).should == "First name"
+      @form.field_name(2).should == "Last name"
+    end
+
     it "lazily loads models for forms" do
       klass = GravityForms.const_get(@class_name)
       klass.should be_a(Class)
     end
+
+    it "raises an error for forms that don't exist" do
+      expect { GravityForms::AFormThatDoesNotExist }.to raise_error(/Form not found/)
+    end
   end
 end

spec/spec_helper.rb

@@ -5,6 +5,9 @@
 
 require 'sequel'
 
+require 'simplecov'
+SimpleCov.start
+
 require 'ruby-wpdb'
 
 WPDB.from_config