docstr: target: test list collection with a simple schema
  method: create collections and list them
  expected: created collections are in list
docstr_tok: ["target",":","test","list","collection","with","a","simple","schema","method",":","create","collections","and","list","them","expected",":","created","collections","are","in","list"]
code: def test_list_collections_default(self):
      """
      target: test list collection with a simple schema
      method: create collections and list them
      expected: created collections are in list
      """
      client = self.collection_client
      name_list = []
      for i in range(2):
          name = gen_collection_name()
          dim = 128
          payload = {
              "collectionName": name,
              "dimension": dim,
          }
          time.sleep(1)
          rsp = client.collection_create(payload)
          assert rsp["code"] == 200
          name_list.append(name)
      rsp = client.collection_list()
      all_collections = rsp["data"]
      for name in name_list:
          assert name in all_collections
  
imports: import datetime
  import random
  import time
  from utils.util_log import test_log
  from utils.utils import gen_collection_name
  import pytest
  from api.milvus import CollectionClient
  from base.testbase import TestBase
  import threading
label_desc: Use image node_id 1 for calling the TestListCollections obj's underlying member method code with example usage: obj.test_list_collections_default() without return types