feat(card): add support for card UkrCard (#81)

Fix #46 

Co-authored-by: Umair Fayaz <umair.fayaz@thoughtworks.com>

Author: umair-fayaz

src/Dedge.Cardizer/Dedge.Cardizer.fs

@@ -728,4 +728,25 @@ type Cardizer =
               [ 6; 7; 6; 7; 7; 0 ]
               [ 6; 7; 6; 7; 7; 4 ] ].[Cardizer.next 3]
 
-        Cardizer.GenerateCard prefix length 
+        Cardizer.GenerateCard prefix length 
+
+    /// <summary>Returns a random UkrCard number.</summary>
+    /// <returns>Random UkrCard number</returns>
+    /// <example>
+    /// This sample shows how to call the <see cref="NextUkrCard"/> method.
+    /// <code>
+    /// void PrintUkrCard()
+    /// {
+    ///    Console.WriteLine(Cardizer.NextUkrCard()); 
+    /// }
+    /// </code>
+    /// </example>
+    static member NextUkrCard([<Optional; DefaultParameterValue(From16To19.Random)>] ukrCardLengthOption) =
+        let length =
+            match ukrCardLengthOption with
+            | From16To19.Random -> Cardizer.NextInRange 16 19
+            | _ -> int ukrCardLengthOption
+
+        let prefix = Cardizer.NextSeqInRange 60400100 60420099
+
+        Cardizer.GenerateCard prefix length

src/Tests/Tests.fs

@@ -433,4 +433,21 @@ let ``Should generate valid Maestro UK`` length expectedLength =
 
     prefixInRange |> should be True
     card |> should haveLength expectedLength
-    card |> luhn |> should be LuhnCheck 
+    card |> luhn |> should be LuhnCheck 
+
+[<Theory>]
+[<InlineData(From16To19.Sixteen, 16)>]
+[<InlineData(From16To19.Seventeen, 17)>]
+[<InlineData(From16To19.Eighteen, 18)>]
+[<InlineData(From16To19.Nineteen, 19)>]
+let ``Should generate valid UkrCard`` length expectedLength =
+    let card = Cardizer.NextUkrCard length
+
+    let start = card.Substring(0, 8) |> int
+
+    let prefixInRange =
+        (start >= 60400100 && start <= 60420099)
+
+    prefixInRange |> should be True
+    card |> should haveLength expectedLength
+    card |> luhn |> should be LuhnCheck