shared_examples_for "an adapter" do |adapter|

  before do
    begin
      MultiMime.use adapter
    rescue LoadError
      pending "Adapter #{adapter} couldn't be loaded (not installed?)"
    end
  end

  describe :type_for do

    context :with_correct_mime_type do
      subject { MultiMime.type_for("text/html") }
      it { should eq "text/html" }
    end

    context :with_incorrect_mime_type do
      subject { MultiMime.type_for("foo/bar") }
      it { should be_nil }
      it { should be_a MultiMime::NullType }
    end

  end

  describe :type_for_extension do

    context :without_dot do
      subject { MultiMime.type_for_extension("html") }
      it { should eq "text/html" }
    end

    context :with_dot do
      subject { MultiMime.type_for_extension(".html") }
      it { should eq "text/html" }
    end

    context :unknown_extension do
      subject { MultiMime.type_for_extension(".foo.bar") }
      it { should be_nil }
      it { should be_a MultiMime::NullType }
    end

  end

  describe :type_for_path do

    context :known_extension do
      subject { MultiMime.type_for_path("/usr/local/foo/bar.html") }
      it { should eq "text/html" }
    end

    context :unknown_extension do
      subject { MultiMime.type_for_path("/usr/local/foo/bar.foo") }
      it { should be_nil }
      it { should be_a MultiMime::NullType }
    end

  end

  describe :type_for_file, :fakefs => true do

    let(:extension_file) {
      File.open("foo.html", "w")
    }
    let(:extensionless_file) {
      File.open("foo", "w")
    }

    context :extension_file do
      subject { MultiMime.type_for_file(extension_file) }
      it { should eq "text/html" }
    end

    context :extensionless_file do
      subject { MultiMime.type_for_file(extensionless_file) }
      it { should be_nil }
      it { should be_a MultiMime::NullType }
    end

  end

  describe :null_type do

    context :with_incorrect_mime_type do

      it "should'nt raise an exception when querying for formats" do
        mime = MultiMime.type_for("foo/bar")
        expect(mime).to be_nil
        expect(mime).to be_a MultiMime::NullType
        expect(mime.html?).to be false
        expect(mime.xml?).to be false
        expect(mime.json?).to be false
      end

    end


  end

end