Reduce test code duplication via supabase Client in pytest fixture

[olirice]

What kind of change does this PR introduce?

The test suite has some minor setup duplication at the top of each function. Namely,

url: str = os.environ.get("SUPABASE_TEST_URL")
key: str = os.environ.get("SUPABASE_TEST_KEY")
supabase: Client = create_client(url, key)

This change factors that test setup into a pytest fixture that is created once and shared across the tests that require a supabase.Client.

[J0]

Hey @olirice ,

Thank you for your contribution! This is helpful and will save us time looking through the duplicated sections of test code. Can we check if there are further changes that you'd like to make? Think we can review and subsequently merge otherwise

[olirice]

Hi @J0

This was the only immediate change I had on the test suite
There is also #26 (if there is interest in that change) but that belong in a separate PR

[J0]

Cool, thanks!