Create Recipe class test file

[quynhtlluu]

Should include tests that determine the following:

• It should have a parameter to take in recipe data.
• It should have methods to determine:
  • A filtered list of recipes based on one or more tags.
  • A filtered list of recipes based on its name or ingredients.
• It should hold on to all its information (provided in the data file).
• It should have methods to:
  • Determine the names of ingredients needed
  • Get the cost of its ingredients
  • Return its directions / instructions