added snap test to proxySet

src/vanilla/utils/test.ts

@@ -1,13 +1,13 @@
 import { snapshot } from '../../vanilla.ts'
 import { proxyMap } from './proxyMap-indexMap-keyval.ts'
+import { proxySet } from './proxySet.ts'
 
-const state = proxyMap([['key1', 'val1']])
+const state = proxySet(['val1', 'val2'])
 const snap1 = snapshot(state)
-console.log(snap1.has('key1'), 'true')
-console.log(snap1.get('key1'), 'val1')
-state.delete('key1')
+console.log(snap1.has('val1'), 'true')
+state.delete('val2')
 const snap2 = snapshot(state)
-console.log(snap1.has('key1'), 'true')
-console.log(snap1.get('key1'), 'val1')
-console.log(snap2.has('key1'), 'false')
-console.log(snap2.get('key1'), 'undefined')
+console.log(snap1.has('val1'), 'true')
+console.log(snap1.has('val2'), 'true')
+console.log(snap2.has('val1'), 'true')
+console.log(snap2.has('val2'), 'false')

tests/proxySet.test.tsx

@@ -351,4 +351,17 @@ describe('snapshot behavior', () => {
     // @ts-expect-error - snapshot should not be able to mutate
     expect(() => snap.clear()).toThrow('Cannot perform mutations on a snapshot')
   })
+
+  it('should work with deleting a key', async () => {
+    const state = proxySet(['val1', 'val2'])
+    const snap1 = snapshot(state)
+    expect(snap1.has('val1')).toBe(true)
+    expect(snap1.has('val2')).toBe(true)
+    state.delete('val1')
+    const snap2 = snapshot(state)
+    expect(snap1.has('val1')).toBe(true)
+    expect(snap1.has('val2')).toBe(true)
+    expect(snap2.has('val1')).toBe(false)
+    expect(snap2.has('val2')).toBe(true)
+  })
 })