Added tests for graceful eviction controller

[anujagrawal699]

Description:
This PR adds comprehensive unit tests for the ResourceBinding (RB) and ClusterResourceBinding (CRB) graceful eviction controllers.

Additions:

1. pkg/controllers/gracefuleviction/crb_graceful_eviction_controller_test.go
2. pkg/controllers/gracefuleviction/rb_graceful_eviction_controller_test.go
   Additionally, a new test case has been added to the Test_nextRetry function in evictiontask_test.go to increase coverage.

Test Coverage:

1. crb_graceful_eviction_controller_test.go : 0% to 62.5%
2. rb_graceful_eviction_controller_test.go : 0% to 62.5%
3. evictiontask_test.go : 98% to 100%
   Overall graceful eviction controller : 35.90% to 76.7%

What type of PR is this?
/kind failing-test
/kind feature

Which issue(s) this PR fixes:
Fixes a part of #5470

Does this PR introduce a user-facing change?:

NONE

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[anujagrawal699]

Hi @zhzhuang-zju , the tests are working fine locally. What can be the problem in setupManager test.

[zhzhuang-zju]

Hi @zhzhuang-zju , the tests are working fine locally. What can be the problem in setupManager test.

From the CI error messages, the reason for the test failure is not clear. I will try to analyze the cause of the failure from the code perspective.

[anujagrawal699]

Hi @zhzhuang-zju , the tests are working fine locally. What can be the problem in setupManager test.

From the CI error messages, the reason for the test failure is not clear. I will try to analyze the cause of the failure from the code perspective.

The setup manager tests fails for each controller everytime on the CI, i had removed that tests from some of my last PR's. I haven't been able to find the root cause of CI failures for them.

[zhzhuang-zju]

The setup manager tests fails for each controller everytime on the CI, i had removed that tests from some of my last PR's. I haven't been able to find the root cause of CI failures for them.

Cannot determine the root cause of the test failure. You can try adding output logs and use your private repository's CI to identify the issue.

[anujagrawal699]

The setup manager tests fails for each controller everytime on the CI, i had removed that tests from some of my last PR's. I haven't been able to find the root cause of CI failures for them.

Cannot determine the root cause of the test failure. You can try adding output logs and use your private repository's CI to identify the issue.

I'm not able to debug it, i think we should proceed without it.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.27%. Comparing base (2e60a6e) to head (547a6a9).
Report is 14 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5543      +/-   ##
==========================================
+ Coverage   34.14%   34.27%   +0.12%     
==========================================
  Files         643      643              
  Lines       44509    44503       -6     
==========================================
+ Hits        15197    15252      +55     
+ Misses      28156    28090      -66     
- Partials     1156     1161       +5     

Flag	Coverage Δ
unittests	34.27% <ø> (+0.12%)	⬆️

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