[skip ci] Add skipped delete case (#9990)

Signed-off-by: ThreadDao <yufen.zong@zilliz.com>

tests/python_client/testcases/test_delete_20.py

@@ -98,6 +98,35 @@ class TestDeleteParams(TestcaseBase):
         collection_w.delete(expr)
         assert collection_w.num_entities == ct.default_nb
 
+    @pytest.mark.skip(reason="Delete function is not implemented")
+    @pytest.mark.tags(CaseLabel.L1)
+    def test_delete_expr_single(self):
+        """
+        target: test delete with one value
+        method: delete with expr: "id in [0]"
+        expected: Describe num entities by one
+        """
+        # init collection with tmp_nb default data
+        collection_w = self.init_collection_general(prefix, nb=tmp_nb, insert_data=True)[0]
+        expr = f'{ct.default_int64_field_name} in {[0]}'
+        collection_w.delete(expr)
+        assert collection_w.num_entities == tmp_nb - 1
+
+    @pytest.mark.skip(reason="Delete function is not implemented")
+    @pytest.mark.tags(CaseLabel.L1)
+    def test_delete_expr_all_values(self):
+        """
+        target: test delete with all values
+        method: delete with expr: "id in [all]"
+        expected: num entities becomes zero
+        """
+        # init collection with default_nb default data
+        collection_w, _, _, ids = self.init_collection_general(prefix, insert_data=True)
+        expr = f'{ct.default_int64_field_name} in {ids[0]}'
+        collection_w.delete(expr)
+        assert collection_w.num_entities == 0
+        assert collection_w.is_empty
+
 
 @pytest.mark.skip(reason="Waiting for development")
 class TestDeleteOperation(TestcaseBase):