Unit test

[OmniZlatoon]

closes #534

Walkthrough:
modified contract/src/test.rs by inserting three new dedicated tests right after the setup() function in the test_multi_session module. These perfectly map to the acceptance criteria defined in your request.

test_initialize_sets_admin_and_treasury

Verification: Called client.initialize() with the necessary arguments, including treasury and admin. Verified that client.get_treasury() successfully returns the configured treasury.
Admin Check: We verified that the admin was properly set and authorized by invoking an admin-only method (client.set_platform_fee()) from the admin's context.
test_initialize_twice_reverts

Verification: Registered a fresh contract, invoked initialize() once, and then intentionally invoked it a second time with the same parameters.
Error Handling: Implemented the #[should_panic(expected = "already initialized")] attribute above the test signature, which strictly asserts that the contract panics as expected when initialize() is called again.
test_uninitialized_contract_reverts

Verification: Registered a fresh contract but entirely skipped the initialize() method. Proceeded to call client.set_platform_fee().
Error Handling: Used the #[should_panic(expected = "not initialized")] attribute to assert that the contract successfully blocks unauthorized/uninitialized interactions.
test_initialize_emits_initialized_event

This test was already implemented in the existing test suite! It effectively checks the event queue for the Initialized topic and successfully matches the tuple (admin, treasury, dispute_window).

[drips-wave]

@OmniZlatoon Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

[OmniZlatoon]

good day sir, please I would Like to continue working under your repo via drips platform.
Can you please assign me issues when I request? I would be very devoted to do the task and complete them on time and with the expected output.