Add testing for returnRecipeImgUrl and deleteRecipe

[joh-ann]

Changes:

This adds testing for our returnRecipeImgUrl and deleteRecipe functions

Checklist:

• [x] I have performed a self-review of my code
• [x] If it is a core feature, I have added thorough tests.
• [x] Is there any unexpected behaviour?

Unexpected behaviour:

N/A