feat(secretmanager): Add secret rotation samples

[khilan-crest]

Add secret rotation samples

[snippet-bot]

Here is the summary of changes.

You are about to add 29 region tags.

• secretmanager/api/SecretManager.Samples/BindTagToRegionalSecret.cs:17, tag secretmanager_bind_tags_to_regional_secret
• secretmanager/api/SecretManager.Samples/BindTagToSecret.cs:17, tag secretmanager_bind_tags_to_secret
• secretmanager/api/SecretManager.Samples/CreateRegionalSecretWithExpiration.cs:17, tag secretmanager_create_regional_secret_with_expire_time
• secretmanager/api/SecretManager.Samples/CreateRegionalSecretWithRotation.cs:17, tag secretmanager_create_regional_secret_with_rotation
• secretmanager/api/SecretManager.Samples/CreateRegionalSecretWithTopic.cs:17, tag secretmanager_create_regional_secret_with_topic
• secretmanager/api/SecretManager.Samples/CreateSecretWithExpiration.cs:17, tag secretmanager_create_secret_with_expiration
• secretmanager/api/SecretManager.Samples/CreateSecretWithRotation.cs:17, tag secretmanager_create_secret_with_rotation
• secretmanager/api/SecretManager.Samples/CreateSecretWithTopic.cs:17, tag secretmanager_create_secret_with_topic
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretAnnotation.cs:17, tag secretmanager_delete_regional_secret_annotation
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretExpiration.cs:17, tag secretmanager_delete_regional_secret_expiration
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretLabel.cs:17, tag secretmanager_delete_regional_secret_label
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretRotation.cs:17, tag secretmanager_delete_regional_secret_rotation
• secretmanager/api/SecretManager.Samples/DeleteSecretAnnotation.cs:17, tag secretmanager_delete_secret_annotation
• secretmanager/api/SecretManager.Samples/DeleteSecretExpiration.cs:17, tag secretmanager_delete_secret_expiration
• secretmanager/api/SecretManager.Samples/DeleteSecretLabel.cs:17, tag secretmanager_delete_secret_label
• secretmanager/api/SecretManager.Samples/DeleteSecretRotation.cs:17, tag secretmanager_delete_secret_rotation
• secretmanager/api/SecretManager.Samples/DetachRegionalTagBinding.cs:17, tag secretmanager_detach_tag_from_regional_secret
• secretmanager/api/SecretManager.Samples/DetachTagBinding.cs:17, tag secretmanager_detach_tag
• secretmanager/api/SecretManager.Samples/EditSecretLabel.cs:17, tag secretmanager_edit_secret_label
• secretmanager/api/SecretManager.Samples/ListRegionalTagBindings.cs:17, tag secretmanager_list_regional_secret_tag_bindings
• secretmanager/api/SecretManager.Samples/ListSecretVersionsWithFilter.cs:17, tag secretmanager_list_secret_versions_with_filter
• secretmanager/api/SecretManager.Samples/ListSecretsWithFilter.cs:17, tag secretmanager_list_secrets_with_filter
• secretmanager/api/SecretManager.Samples/ListTagBindings.cs:17, tag secretmanager_list_tag_bindings
• secretmanager/api/SecretManager.Samples/UpdateRegionalSecretExpiration.cs:17, tag secretmanager_update_regional_secret_expiration
• secretmanager/api/SecretManager.Samples/UpdateRegionalSecretRotation.cs:17, tag secretmanager_update_regional_secret_rotation_period
• secretmanager/api/SecretManager.Samples/UpdateSecretExpiration.cs:17, tag secretmanager_update_secret_expiration
• secretmanager/api/SecretManager.Samples/UpdateSecretRotation.cs:17, tag secretmanager_update_secret_rotation
• secretmanager/api/SecretManager.Samples/createRegionalSecretWithCmek.cs:17, tag secretmanager_create_regional_secret_with_cmek
• secretmanager/api/SecretManager.Samples/createSecretWithCmek.cs:17, tag secretmanager_create_secret_with_cmek

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment

[gemini-code-assist]

Summary of Changes

Hello @khilan-crest, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the C# client library for Google Cloud Secret Manager by introducing a wide array of new code samples. These samples aim to provide developers with clear, practical examples for advanced secret management functionalities, including automated secret rotation, time-based expiration, integration with resource tags for better organization, and the use of Customer-Managed Encryption Keys for enhanced security. The additions also cover improved secret discoverability through filtered listing operations and comprehensive metadata management.

Highlights

• New Secret Management Samples: A comprehensive suite of C# samples has been added for Google Cloud Secret Manager, covering various secret lifecycle and metadata management operations.
• Secret Rotation and Expiration: New samples demonstrate how to create, update, and delete secret rotation and expiration configurations for both global and regional secrets.
• Tag Management: Examples are included for binding, detaching, and listing tags associated with secrets, supporting both global and regional contexts.
• Filtering and Metadata: Samples for listing secret versions with filters (e.g., by state) and listing secrets with filters (e.g., by labels) are now available.
• Customer-Managed Encryption Keys (CMEK): Samples for creating secrets with Customer-Managed Encryption Keys (CMEK) are added, for both global and regional deployments.
• Metadata Deletion: Implemented samples for managing secret metadata, specifically for deleting annotations and labels.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request adds a comprehensive set of samples and tests for secret rotation and related features in Secret Manager. The additions are valuable. However, there are several critical issues in the tests that need to be addressed:

• Many of the new tests rely on helper methods in the test fixtures (e.g., CreateSecretWithExpireTime, CreateSecretWithRotation) which have not been implemented. This will cause compilation failures. These helper methods need to be added to SecretManagerFixture and RegionalSecretManagerFixture.
• Several tests create resources (secrets, tags) but fail to clean them up, which will lead to resource leaks in the test project.
• There's a bug in DeleteSecretExpirationTests where the wrong secret is deleted.
• A few other minor issues like incorrect logging, exception handling, and filename mismatches are also present.

I've added specific comments on the relevant files. Addressing these issues will improve the correctness and reliability of the new samples and tests.