Add tests for DefaultPetTask refactor

[kasugaijin]

@atbalaji if you want to take this on seeing as you worked on the PR, please assign yourself. Otherwise, let me know in a comment below and we can open it up to someone else.

PR

[atbalaji]

Currently I'm not taking this @kasugaijin. I would like to revisit this incase no one else took this.

[kasugaijin]

@atbalaji all yours when you want it...just assign yourself.

[Aaryanpal]

@kasugaijin can u please assign this

[kasugaijin]

@Aaryanpal no need to test front end that looks for DOM elements. Just backend model or controller level makes sense

[Aaryanpal]

WIP