code: def test_h2oconnectionconf():
      """Test H2OConnectionConf functionality."""
  
      # Verify construction of config from dictionary
      conf1 = {"ip": "1.1.1.1", "port": 80}
      cconf1 = H2OConnectionConf(conf1)
      assert cconf1.ip == "1.1.1.1"
      assert cconf1.port == 80
      assert cconf1.url == "http://1.1.1.1:80/"
  
      # Verify error handling
      conf2 = {"ip": 80, "port": 80}
      try:
          cconf2 = H2OConnectionConf(conf2)
      except H2OTypeError:
          pass
  
      conf3 = {"dummy": "variable", "ip": "localhost"}
      try:
          cconf3 = H2OConnectionConf(conf3)
      except H2OValueError:
          pass
  
      conf4 = {
          "ip": "localhost",
          "port": 54321,
          "context_path": "cluster_4",
          "https": True,
      }
      cconf4 = H2OConnectionConf(conf4)
      assert cconf4.url == "https://localhost:54321/cluster_4"
  
      # Verify URL pattern
      assert_url_pattern(
          "http://localhost:54321", "http", "localhost", "54321", None
      )
      assert_url_pattern(
          "http://localhost:54322/", "http", "localhost", "54322", None
      )
      assert_url_pattern(
          "http://localhost:54323/cluster_X",
          "http",
          "localhost",
          "54323",
          "/cluster_X",
      )
      assert_url_pattern(
          "http://localhost:54324/a/b/c/d",
          "http",
          "localhost",
          "54324",
          "/a/b/c/d",
      )
  
imports: from h2o.backend import H2OConnectionConf, H2OConnection
  from h2o.exceptions import H2OTypeError, H2OValueError
  from h2o.utils.typechecks import assert_matches
label_desc: Use image node_id 2 for calling a global function with example usage: test_h2oconnectionconf() without return types