Add isogram exercise generator

exercises/isogram/Example.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Collections.Generic;
 
-public class Isogram
+public static class Isogram
 {
     public static bool IsIsogram(string word)
     {
@@ -17,4 +17,4 @@ public static bool IsIsogram(string word)
 
         return true;
     }
-}
+}

exercises/isogram/IsogramTest.cs

@@ -1,20 +1,52 @@
-using Xunit;
+using Xunit;
 
 public class IsogramTest
 {
-    [Theory]
-    [InlineData("duplicates", true)]
-    [InlineData("eleven", false)]
-    [InlineData("subdermatoglyphic", true)]
-    [InlineData("Alphabet", false)]
-    [InlineData("thumbscrew-japingly", true)]
-    [InlineData("Hjelmqvist-Gryb-Zock-Pfund-Wax", true)]
-    [InlineData("Heizölrückstoßabdämpfung", true)]
-    [InlineData("the quick brown fox", false)]
-    [InlineData("Emily Jung Schwartzkopf", true)]
-    [InlineData("éléphant", false)]
-    public void Isogram_correctly_detects_isograms(string input, bool expected)
-    {
-        Assert.Equal(expected, Isogram.IsIsogram(input));
+    [Fact]
+    public void Empty_string()
+    {
+        Assert.True(Isogram.IsIsogram(""));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Isogram_with_only_lower_case_characters()
+    {
+        Assert.True(Isogram.IsIsogram("isogram"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Word_with_one_duplicated_character()
+    {
+        Assert.False(Isogram.IsIsogram("eleven"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Longest_reported_english_isogram()
+    {
+        Assert.True(Isogram.IsIsogram("subdermatoglyphic"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Word_with_duplicated_character_in_mixed_case()
+    {
+        Assert.False(Isogram.IsIsogram("Alphabet"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Hypothetical_isogrammic_word_with_hyphen()
+    {
+        Assert.True(Isogram.IsIsogram("thumbscrew-japingly"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Isogram_with_duplicated_non_letter_character()
+    {
+        Assert.True(Isogram.IsIsogram("Hjelmqvist-Gryb-Zock-Pfund-Wax"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Made_up_name_that_is_an_isogram()
+    {
+        Assert.True(Isogram.IsIsogram("Emily Jung Schwartzkopf"));
     }
 }

generators/Exercises/IsogramExercise.cs

@@ -0,0 +1,9 @@
+namespace Generators.Exercises
+{
+    public class IsogramExercise : BooleanExercise
+    {
+        public IsogramExercise() : base("isogram")
+        {
+        }
+    }
+}