Adding tests for isogram (#2590)

Author: jagdish-15

exercises/practice/isogram/.meta/config.json

@@ -3,6 +3,7 @@
   "contributors": [
     "amscotti",
     "ankorGH",
+    "jagdish-15",
     "matthewmorgan",
     "ovidiu141",
     "PakkuDon",

exercises/practice/isogram/.meta/tests.toml

@@ -1,6 +1,13 @@
-# This is an auto-generated file. Regular comments will be removed when this
-# file is regenerated. Regenerating will not touch any manually added keys,
-# so comments can be added in a "comment" key.
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
 
 [a0e97d2d-669e-47c7-8134-518a1e2c4555]
 description = "empty string"
@@ -40,3 +47,6 @@ description = "duplicated character in the middle"
 
 [310ac53d-8932-47bc-bbb4-b2b94f25a83e]
 description = "same first and last characters"
+
+[0d0b8644-0a1e-4a31-a432-2b3ee270d847]
+description = "word with duplicated character and with two hyphens"

exercises/practice/isogram/isogram.spec.js

@@ -54,5 +54,9 @@ describe('Isogram', () => {
     xtest('same first and last characters', () => {
       expect(isIsogram('angola')).toEqual(false);
     });
+
+    xtest('word with duplicated character and with two hyphens', () => {
+      expect(isIsogram('up-to-date')).toEqual(false);
+    });
   });
 });