Equality Vs Identity

[Boomatang]

In a number of location there were comparisons against None, and boolean values that were using equality comparisons. This can lead to bugs caused by false positives. Bug of this nature are hard track down.

While I could not track down an instance of the bug, this PR introduces the correct pattern of using identity comparisons to the code base. Hopefully, the pattern will be followed within future work, and no unexpected bugs arise.

Equality and Identity by example

In the repl equality and identity can easily be seen.

>>> 1 == True # Equality
True
>>> 1 is True # Identity
False

Classes defining a custom __eq__() methods can have logic error that allowing None equality to be true.

class Foo:
  def __eq__(self, other):
    return True

bar = Foo()

if bar == None:
  print("bar is None !!!")

if bar is not None:
  print("but bar is also not None !!!")

More on comparisons can be found at https://docs.python.org/3/reference/expressions.html#comparisons

Verification

There is no fundamental change to the logic. All tests should pass as expected.

Note: Locally I was not setup to run e2e tests.

[openshift-ci]

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[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92.47%. Comparing base (e8404ec) to head (d928e0a).

Files with missing lines	Patch %	Lines
src/codeflare_sdk/ray/cluster/cluster.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #916   +/-   ##
=======================================
  Coverage   92.47%   92.47%           
=======================================
  Files          25       25           
  Lines        1395     1395           
=======================================
  Hits         1290     1290           
  Misses        105      105           

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