Skip Rails generator tests for legacy rails

- Rails versions < 2.3.11 are incompatible with the latest rubygems,
  travis-ci doesn't permit testing different rubygem versions, so just
  skip it (generator tests should be replaced with a wrapper testing the
  functionality, and then a simple mock anyways).

lib/jasmine/dependencies.rb

@@ -10,6 +10,10 @@ def rails2?
         safe_gem_check("rails", "~> 2.3")
       end
 
+      def legacy_rails?
+        safe_gem_check("rails", "< 2.3.11")
+      end
+
       def rails3?
         safe_gem_check("rails", ">= 3.0")
       end

spec/dependencies_spec.rb

@@ -43,6 +43,22 @@ module Rails
         end
       end
 
+      describe ".legacy_rails?" do
+        subject { Jasmine::Dependencies.legacy_rails? }
+        context "when rails < 2.3.11 is present" do
+          before do
+            Gem::Specification.should_receive(:find_by_name).with("rails", "< 2.3.11").and_return(true)
+          end
+          it { should be_true }
+        end
+        context "when rails < 2.3.11 is not present" do
+          before do
+            Gem::Specification.should_receive(:find_by_name).with("rails", "< 2.3.11").and_raise(Gem::LoadError)
+          end
+          it { should be_false }
+        end
+      end
+
       describe ".rails3?" do
         subject { Jasmine::Dependencies.rails3? }
         context "when rails 3 is present" do
@@ -151,6 +167,21 @@ module Rails
         end
       end
 
+      describe ".legacy_rails?" do
+        subject { Jasmine::Dependencies.legacy_rails? }
+        before do
+          Gem.should_receive(:available?).with("rails", "< 2.3.11").and_return(legacy_rails_present)
+        end
+        context "when rails < 2.3.11 is present" do
+          let(:legacy_rails_present) { true }
+          it { should be_true }
+        end
+        context "when rails < 2.3.11 is not present" do
+          let(:legacy_rails_present) { false }
+          it { should be_false }
+        end
+      end
+
       describe ".rails3?" do
         subject { Jasmine::Dependencies.rails3? }
         before do

spec/jasmine_rails2_spec.rb

@@ -1,6 +1,6 @@
 require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper"))
 
-if Jasmine::Dependencies.rails2?
+if Jasmine::Dependencies.rails2? && !Jasmine::Dependencies.legacy_rails?
 
   describe "A Rails 2 app" do