Add include? to list, uniquelist (re-open)

README.md

@@ -53,6 +53,7 @@ integer_list = Kredis.list "myintegerlist", typed: :integer, default: [ 1, 2, 3
 integer_list.append([ 4, 5, 6 ])                                                  # => RPUSH myintegerlist "4" "5" "6"
 integer_list << 7                                                                 # => RPUSH myintegerlist "7"
 [ 1, 2, 3, 4, 5, 6, 7 ] == integer_list.elements                                  # => LRANGE myintegerlist 0 -1
+integer_list.include? 7                                                           # => LPOS myintegerlist 7, Requires Redis 6+
 
 unique_list = Kredis.unique_list "myuniquelist"
 unique_list.append(%w[ 2 3 4 ])                # => LREM myuniquelist 0, "2" + LREM myuniquelist 0, "3" + LREM myuniquelist 0, "4"  + RPUSH myuniquelist "2", "3", "4"

lib/kredis/types/list.rb

@@ -3,7 +3,7 @@
 class Kredis::Types::List < Kredis::Types::Proxying
   prepend Kredis::DefaultValues
 
-  proxying :lrange, :lrem, :lpush, :ltrim, :rpush, :exists?, :del
+  proxying :lrange, :lrem, :lpush, :ltrim, :rpush, :exists?, :del, :lpos
 
   attr_accessor :typed
 
@@ -33,6 +33,11 @@ def last(n = nil)
     n ? lrange(-n, -1) : lrange(-1, -1).first
   end
 
+  # Require Redis 6+ for LPOS
+  def include?(element)
+    !lpos(element).nil?
+  end
+
   private
     def set_default
       append default

test/types/list_test.rb

@@ -131,4 +131,12 @@ class ListTest < ActiveSupport::TestCase
 
     assert_equal [ 0, 1, 2, 3, 4, 10, 20, 30 ], Kredis.list("mylist", typed: :integer).to_a.sort
   end
+
+  test "include?" do
+    list = Kredis.list "int-list", typed: :integer
+    list.append [ 1, 2, 3 ]
+
+    assert list.include?(1)
+    assert_not list.include?(4)
+  end
 end

test/types/unique_list_test.rb

@@ -93,4 +93,10 @@ class UniqueListTest < ActiveSupport::TestCase
     @list.prepend(%w[ 6 7 8 ])
     assert_equal %w[ 8 7 6 1 2 3 ], @list.elements
   end
+
+  test "include?" do
+    @list = Kredis.unique_list "myuniquelist", default: %w[ 1 2 3 ]
+    assert @list.include?("1")
+    assert_not @list.include?("4")
+  end
 end