describe Convoy::Setup::Configuration::MergeTool do
    let(:merge_tool) { Convoy::Setup::Configuration::MergeTool.new(new_config_hash, old_config_hash) }

    describe "#config_hash" do
        subject { merge_tool.config_hash }

        context "when there is a new command" do
            let(:old_config_hash) { { :global => { :commands => {}, :options => { :option1 => nil } }, :user => { :hello => :world } } }
            let(:new_config_hash) { { :global => { :commands => { :command1 => { :commands => {}, :options => {} } }, :options => {} }, :user => {} } }

            it("should be part of the config") { subject[:global][:commands][:command1].should_not be_nil }
        end

        context "when there is a new option for an old command" do
            let(:old_config_hash) { { :global => { :commands => {}, :options => { :option1 => nil } }, :user => { :hello => :world } } }
            let(:new_config_hash) { { :global => { :commands => {}, :options => { :option1 => nil, :option2 => nil } }, :user => {} } }

            it("should be part of the config") { subject[:global][:options].keys.should include(:option2) }
        end

        context "when an old option for a command is no longer there" do
            let(:old_config_hash) { { :global => { :commands => {}, :options => { :option1 => nil } }, :user => { :hello => :world } } }
            let(:new_config_hash) { { :global => { :commands => {}, :options => { :option2 => nil } }, :user => {} } }

            it("should not be part of the config") { subject[:global][:options].keys.should_not include(:option1) }
        end

        context "when old config hash has user supplied value for option" do
            let(:old_config_hash) { { :global => { :commands => {}, :options => { :option1 => :hello } }, :user => { :hello => :world } } }
            let(:new_config_hash) { { :global => { :commands => {}, :options => { :option1 => nil } }, :user => {} } }

            it("should retain the user supplied value for option") { subject[:global][:options][:option1].should == :hello }
        end

        context "when old user hash has values" do
            let(:old_config_hash) { { :global => { :commands => {}, :options => {} }, :user => { :hello => :world } } }
            let(:new_config_hash) { { :global => { :commands => {}, :options => {} }, :user => {} } }
            it("should retain the user config values") { subject[:user][:hello].should == :world }
        end
    end
end