test: add missing cn() and get_delegate() edge case coverage

__tests__/lib/utils.test.ts

@@ -85,6 +85,20 @@ describe('cn', () => {
       expect(cn('font-bold', 'font-normal')).toBe('font-normal')
     })
 
+    it('later margin utility wins over earlier one', () => {
+      expect(cn('m-4', 'm-2')).toBe('m-2')
+    })
+
+    it('later axis-specific padding wins over earlier axis-specific padding', () => {
+      expect(cn('px-4', 'px-2')).toBe('px-2')
+    })
+
+    it('keeps padding-x and padding-y as they target different axes', () => {
+      const result = cn('px-4', 'py-2')
+      expect(result).toContain('px-4')
+      expect(result).toContain('py-2')
+    })
+
     it('keeps non-conflicting utilities from both sides', () => {
       // flex and p-2 are different groups — both should survive.
       const result = cn('flex p-4', 'p-2')

contracts/streaming/src/test.rs

@@ -1504,6 +1504,27 @@ fn test_set_delegate_by_recipient() {
     assert_eq!(stored_delegate, Some(delegate));
 }
 
+#[test]
+fn test_get_delegate_none_when_never_set() {
+    let t = TestEnv::setup();
+    let now = 1_000_000u64;
+    t.set_time(now);
+    let client = t.client();
+    let params = t.default_params(now);
+    let total = params.total_amount;
+
+    t.token().approve(
+        &t.sender,
+        &t.contract_id,
+        &total,
+        &(t.env.ledger().sequence() + 500),
+    );
+    let stream_id = client.create_stream(&t.sender, &params);
+
+    // No delegate was ever set on this stream.
+    assert_eq!(client.get_delegate(&stream_id), None);
+}
+
 #[test]
 fn test_delegate_can_withdraw() {
     let t = TestEnv::setup();