@include describe("Contain") {
  @include it("should expect list with value to contain") {
    $list-1: true, true, true;
    $list-2: "foo", "bar", "baz";
    $list-3: 100, 0.2, 12;
    $list-4: false, null, false;

    @include should( expect( $list-1 ), to( contain( true  )));
    @include should( expect( $list-2 ), to( contain( "bar" )));
    @include should( expect( $list-3 ), to( contain( 100   )));
    @include should( expect( $list-4 ), to( contain( null  )));
  }

  @include it("should expect list without value not to contain") {
    $list-1: true, true, true;
    $list-2: "foo", "bar", "baz";
    $list-3: 100, 0.2, 12;
    $list-4: false, null, false;

    @include should( expect( $list-1 ), not-to( contain( false )));
    @include should( expect( $list-2 ), not-to( contain( "fiz" )));
    @include should( expect( $list-3 ), not-to( contain( 300   )));
    @include should( expect( $list-4 ), not-to( contain( "sod" )));
  }

  @include it("should expect item with value to contain") {
    @include should( expect( true  ), to( contain( true  )));
    @include should( expect( "bar" ), to( contain( "bar" )));
    @include should( expect( 100   ), to( contain( 100   )));
    @include should( expect( null  ), to( contain( null  )));
  }

  @include it("should expect item without value not to contain") {
    @include should( expect( true  ), not-to( contain( false )));
    @include should( expect( "foo" ), not-to( contain( "fiz" )));
    @include should( expect( 200   ), not-to( contain( 300   )));
    @include should( expect( null  ), not-to( contain( "sod" )));
  }
}