Answers

1. The Fact attribute is missing from the test method.
2. We would use the Assert.Contains method in the Assert class.
3. The test filename needs to end with .test.tsx. So, if we rename the file List.test.tsx, then the test will get picked up.
4. We can use the following code to check an object isn't null:

   expect(result).not.toBeNull();

5. We can use the toEqual Jest matcher function to compare objects:

   expect(person).toEqual({ 
     id: 1, 
     firstName: "Tom", 
     surname: "Smith" 
   });

6. We can use the following Cypress command to check the page heading:

   cy.contains('Sign In');

7. We can use the following Cypress command to check that Loading… only appears while data is being fetched:

   cy.contains('Loading...');
   cy.contains('Loading...').should('not.exist');

   The first command will check that the page renders Loading... on the initial...