describe :env_value, :shared => true do
  it "returns true if ENV has the value" do
    ENV["foo"] = "bar"
    ENV.send(@method, "bar").should == true
    ENV["foo"] = nil
  end

  it "returns false if ENV doesn't have the value" do
    ENV.send(@method, "this_value_should_never_exist").should == false
  end

  platform_is :windows do
    it "looks up values case-insensitively" do
      ENV["FOO"] = "bar"
      ENV.send(@method, "Foo").should == "bar"
    end
  end
end
