load contents from env file

spec/foreman_spec.rb

@@ -8,4 +8,18 @@ describe Foreman do
     it { should be_a String }
   end
 
+  describe "::load!(env_file)" do
+    before do
+      File.open("/tmp/env1", "w") { |f| f.puts("FOO=bar") }
+    end
+
+    after do
+      ENV['FOO'] = nil
+    end
+
+    it "should load env_file into ENV" do
+      Foreman.load!("/tmp/env1")
+      ENV['FOO'].should == 'bar'
+    end 
+  end
 end