feat(new-tool): diff of two json objects

src/tools/json-diff/json-diff.models.test.ts

@@ -0,0 +1,80 @@
+import { expect, describe, it } from 'vitest';
+import { diff } from './json-diff.models';
+
+describe('json-diff models', () => {
+  describe('diff', () => {
+    it('list object differences', () => {
+      const obj = { a: 1, b: 2 };
+      const newObj = { a: 1, b: 2, c: 3 };
+      const result = diff(obj, newObj);
+
+      expect(result).toEqual({
+        key: '',
+        type: 'object',
+        children: [
+          {
+            key: 'a',
+            type: 'value',
+            value: 1,
+            oldValue: 1,
+            status: 'unchanged',
+          },
+          {
+            key: 'b',
+            type: 'value',
+            value: 2,
+            oldValue: 2,
+            status: 'unchanged',
+          },
+          {
+            key: 'c',
+            type: 'value',
+            value: 3,
+            oldValue: undefined,
+            status: 'added',
+          },
+        ],
+        oldValue: { a: 1, b: 2 },
+        value: { a: 1, b: 2, c: 3 },
+        status: 'children-updated',
+      });
+    });
+
+    it('list array differences', () => {
+      const obj = [1, 2];
+      const newObj = [1, 2, 3];
+      const result = diff(obj, newObj);
+
+      expect(result).toEqual({
+        key: '',
+        type: 'array',
+        children: [
+          {
+            key: 0,
+            type: 'value',
+            value: 1,
+            oldValue: 1,
+            status: 'unchanged',
+          },
+          {
+            key: 1,
+            type: 'value',
+            value: 2,
+            oldValue: 2,
+            status: 'unchanged',
+          },
+          {
+            key: 2,
+            type: 'value',
+            value: 3,
+            oldValue: undefined,
+            status: 'added',
+          },
+        ],
+        oldValue: [1, 2],
+        value: [1, 2, 3],
+        status: 'children-updated',
+      });
+    });
+  });
+});