old_contents: import unittest
  
  from recipe_scrapers._exceptions import SchemaOrgException
  from recipe_scrapers._schemaorg import SchemaOrg
  
  
  class TestSchemaOrg(unittest.TestCase):
      def setUp(self):
          with open("tests/test_data/schemaorg.testhtml", encoding="utf-8") as pagedata:
              self.schema = SchemaOrg(pagedata.read())
  
      def test_total_time_with_schema_missing_all_data_should_raise_exception(self):
          keys = ["totalTime", "cookTime", "prepTime"]
          for k in keys:
              if k in self.schema.data:
                  del self.schema.data[k]
          with self.assertRaises(SchemaOrgException):
              self.assertEqual(self.schema.total_time(), None)
  
      def test_total_time_with_schema__all_zeros(self):
          keys = ["totalTime", "cookTime", "prepTime"]
          for k in keys:
              self.schema.data[k] = "PT0M"
          self.assertEqual(self.schema.total_time(), 0)
          del self.schema.data["totalTime"]
          self.assertEqual(self.schema.total_time(), 0)
  
      def test_graph_schema_without_context(self):
          with open(
              "tests/test_data/schemaorg_graph.testhtml", encoding="utf-8"
          ) as pagedata:
              schema = SchemaOrg(pagedata.read())
          self.assertNotEqual(schema.data, {})
  
new_contents: import unittest
  
  from recipe_scrapers._exceptions import SchemaOrgException
  from recipe_scrapers._schemaorg import SchemaOrg
  
  
  class TestSchemaOrg(unittest.TestCase):
      def setUp(self):
          with open("tests/test_data/schemaorg.testhtml", encoding="utf-8") as pagedata:
              self.schema = SchemaOrg(pagedata.read())
  
      def test_total_time_with_schema_missing_all_data_should_raise_exception(self):
          keys = ["totalTime", "cookTime", "prepTime"]
          for k in keys:
              if k in self.schema.data:
                  del self.schema.data[k]
          with self.assertRaises(SchemaOrgException):
              self.assertEqual(self.schema.total_time(), None)
  
      def test_total_time_with_schema__all_zeros(self):
          keys = ["totalTime", "cookTime", "prepTime"]
          for k in keys:
              self.schema.data[k] = "PT0M"
          self.assertEqual(self.schema.total_time(), 0)
          del self.schema.data["totalTime"]
          self.assertEqual(self.schema.total_time(), 0)
  
      def test_nutrient_retrieval(self):
          expected_nutrients = {
              "calories": "240 calories",
              "fatContent": "9 grams fat",
          }
          self.assertEqual(self.schema.nutrients(), expected_nutrients)
  
      def test_graph_schema_without_context(self):
          with open(
              "tests/test_data/schemaorg_graph.testhtml", encoding="utf-8"
          ) as pagedata:
              schema = SchemaOrg(pagedata.read())
          self.assertNotEqual(schema.data, {})
  
subject: Add test coverage for expected nutrient retrieval behaviour