New test cases

test/index.test.js

@@ -290,6 +290,148 @@ describe("Jsondiff", function() {
       ];
       runTests(tests);
     });
+    describe("Emoji", function() {
+      let tests = [
+        {
+          name: "Emoji replacement",
+          start: { one: "1234abcdef" },
+          end: { one: "1234😃bcdef" },
+          expectedCommand: [
+            { sd: 'a', p: [ 'one', 4 ] },
+            { si: '😃', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Emoji insertion",
+          start: { one: "1234abcdef" },
+          end: { one: "1234😃abcdef" },
+          expectedCommand: [
+            { si: '😃', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Emoji deletion",
+          start: { one: "1234😃abcdef" },
+          end: { one: "1234abcdef" },
+          expectedCommand: [
+            { sd: '😃', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Multiple emoji insertion",
+          start: { one: "1234abcdef" },
+          end: { one: "1234😃😃abcdef" },
+          expectedCommand: [
+            { si: '😃😃', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Multiple emoji deletion",
+          start: { one: "1234😃😃abcdef" },
+          end: { one: "1234abcdef" },
+          expectedCommand: [
+            { sd: '😃😃', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Complex emoji replacement",
+          start: { one: "Hello👋World" },
+          end: { one: "Hello🌍World" },
+          expectedCommand: [
+            { sd: '👋', p: [ 'one', 5 ] },
+            { si: '🌍', p: [ 'one', 5 ] }
+          ]
+        },
+        {
+          name: "Multi-codepoint emoji insertion",
+          start: { one: "text" },
+          end: { one: "text👨‍💻" },
+          expectedCommand: [
+            { si: '👨‍💻', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Multi-codepoint emoji deletion",
+          start: { one: "text👨‍💻more" },
+          end: { one: "textmore" },
+          expectedCommand: [
+            { sd: '👨‍💻', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Skin tone modifier emoji insertion",
+          start: { one: "wave👋" },
+          end: { one: "wave👋🏽" },
+          expectedCommand: [
+            { si: '🏽', p: [ 'one', 6 ] }
+          ]
+        },
+        {
+          name: "Flag emoji replacement",
+          start: { one: "Country🇺🇸flag" },
+          end: { one: "Country🇬🇧flag" },
+          expectedCommand: [
+            { sd: '🇺🇸', p: [ 'one', 7 ] },
+            { si: '🇬🇧', p: [ 'one', 7 ] }
+          ]
+        },
+        {
+          name: "Mixed Unicode characters",
+          start: { one: "café🍕naïve" },
+          end: { one: "café🌮naïve" },
+          expectedCommand: [
+            { sd: '🍕', p: [ 'one', 4 ] },
+            { si: '🌮', p: [ 'one', 4 ] }
+          ]
+        },
+        {
+          name: "Emoji sequence with ZWJ",
+          start: { one: "family👨‍👩‍👧‍👦end" },
+          end: { one: "family👨‍👩‍👧end" },
+          expectedCommand: [
+            { sd: '👨‍👩‍👧‍👦', p: [ 'one', 6 ] },
+            { si: '👨‍👩‍👧', p: [ 'one', 6 ] }
+          ]
+        },
+        {
+          name: "Mathematical symbols",
+          start: { one: "equation∑∞" },
+          end: { one: "equation∫∞" },
+          expectedCommand: [
+            { sd: '∑', p: [ 'one', 8 ] },
+            { si: '∫', p: [ 'one', 8 ] }
+          ]
+        },
+        {
+          name: "CJK characters",
+          start: { one: "hello世界" },
+          end: { one: "hello世間" },
+          expectedCommand: [
+            { sd: '界', p: [ 'one', 6 ] },
+            { si: '間', p: [ 'one', 6 ] }
+          ]
+        },
+        {
+          name: "Combining diacritical marks",
+          start: { one: "café" },
+          end: { one: "cafe\u0301" },
+          expectedCommand: [
+            { sd: 'é', p: [ 'one', 3 ] },
+            { si: 'e\u0301', p: [ 'one', 3 ] }
+          ]
+        },
+        {
+          name: "Regional indicator symbols",
+          start: { one: "🇺🇸🇬🇧🇫🇷" },
+          end: { one: "🇺🇸🇩🇪🇫🇷" },
+          expectedCommand: [
+            { sd: '🇬🇧', p: [ 'one', 2 ] },
+            { si: '🇩🇪', p: [ 'one', 2 ] }
+          ]
+        },
+      ];
+      runTests(tests);
+    });
   });
   describe("JSON1", function () {
     describe("Reversible remove", function () {