Add unit tests for gclient package

[anujagrawal699]

While working with the gclient package, I noticed that there are currently no unit tests for this package. Adding tests would improve the reliability and maintainability of this important component.

Current situation:

• The gclient package lacks unit tests, making it difficult to ensure its functionality and catch potential regressions.

Proposed changes:

1. Create a new file gclient_test.go in the gclient package.
2. Implement the following tests:
   a. TestNewSchema: Verify that NewSchema() returns a non-nil schema.
   b. TestNewForConfig: Test NewForConfig() with both valid and invalid configurations.
   c. TestNewForConfigOrDie: Test TestNewForConfigOrDieWithValidConfig() with a valid configuration.
   d. TestAggregatedScheme: Verify that the aggregated scheme includes expected types.
3. Ensure a test coverage upto 90%.

This is a sub-task of #5236

These tests will:

• Ensure the basic functionality of the gclient package
• Improve code coverage
• Serve as documentation for expected behavior
• Help catch potential issues in future changes

I'm willing to submit a pull request with these new tests.

[karmada-bot]

@anujagrawal699: The label(s) kind/enhancement, area/testing cannot be applied, because the repository doesn't have them.

In response to this:

While working with the gclient package, I noticed that there are currently no unit tests for this package. Adding tests would improve the reliability and maintainability of this important component.

Current situation:

• The gclient package lacks unit tests, making it difficult to ensure its functionality and catch potential regressions.

Proposed changes:

1. Create a new file gclient_test.go in the gclient package.
2. Implement the following tests:
   a. TestNewSchema: Verify that NewSchema() returns a non-nil schema.
   b. TestNewForConfig: Test NewForConfig() with both valid and invalid configurations.
   c. TestNewForConfigOrDie: Test TestNewForConfigOrDieWithValidConfig() with a valid configuration.
   d. TestAggregatedScheme: Verify that the aggregated scheme includes expected types.
3. Ensure a test coverage upto 90%.

These tests will:

• Ensure the basic functionality of the gclient package
• Improve code coverage
• Serve as documentation for expected behavior
• Help catch potential issues in future changes

I'm willing to submit a pull request with these new tests.

/kind enhancement
/area testing

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[liangyuanpeng]

/assign anujagrawal699