class_docstr: Test the MissingDependencies exception.
docstr: Test new MissingDependencies with a message.
docstr_tok: ["Test","new","MissingDependencies","with","a","message","."]
code: def test_new_missing_dependencies_with_message(self):
      """Test new MissingDependencies with a message."""
      from satpy.node import MissingDependencies
  
      error = MissingDependencies("bla", "This is a message")
      assert "This is a message" in str(error)
  
imports: import os
  import unittest
  from satpy.dependency_tree import DependencyTree
  from satpy.tests.utils import make_cid, make_dataid
label_desc: Use image node_id 2 for calling the TestMissingDependencies obj's underlying member method code with example usage: obj.test_new_missing_dependencies_with_message() without return types