Make JetStream tests use test doubles instead of a real NATS server

[raypinto]

Description

All the tests in the JetStream handler start a full blown NATS server. Change this behaviour to use the server when its really needed and use test doubles for the other tests.

Reasons

Improve tests and make it as efficient as possible.

Implementation

• [ ] #15705
• [ ] #15706

[k15r]

2 steps

• [ ] write unit tests for every function in jetstream backend. (5)
• [ ] move all existing integration tests from backend tests to reconciler tests.

[kyma-bot]

This issue or PR has been automatically marked as stale due to the lack of recent activity. Thank you for your contributions.

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/lifecycle stale

[kyma-bot]

This issue or PR has been automatically closed due to the lack of activity. Thank you for your contributions.

This bot triages issues and PRs according to the following rules:

• After 60d of inactivity, lifecycle/stale is applied
• After 7d of inactivity since lifecycle/stale was applied, the issue is closed

You can:

• Reopen this issue or PR with /reopen
• Mark this issue or PR as fresh with /remove-lifecycle stale

If you think that I work incorrectly, kindly raise an issue with the problem.

/close

[kyma-bot]

@kyma-bot: Closing this issue.

In response to this:

This issue or PR has been automatically closed due to the lack of activity. Thank you for your contributions.

This bot triages issues and PRs according to the following rules:

• After 60d of inactivity, lifecycle/stale is applied
• After 7d of inactivity since lifecycle/stale was applied, the issue is closed

You can:

• Reopen this issue or PR with /reopen
• Mark this issue or PR as fresh with /remove-lifecycle stale

If you think that I work incorrectly, kindly raise an issue with the problem.

/close

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