# Tester_Agent - Conversation Entity Tests

## Task:
Create unit tests for Conversation entity

## Requirements:
- Create tests in Chat.Tests project
- Test all Conversation entity properties:
  - Id
  - Participant1Id
  - Participant2Id
  - CreatedAt
  - LastMessageId (nullable)
  - LastMessageAt
  - UnreadCount1
  - UnreadCount2

## Test Cases to Implement:
1. Test_CanCreateConversationWithDefaultValues
2. Test_CanCreateConversationWithAllProperties
3. Test_ConversationPropertiesAreCorrectlySet
4. Test_LastMessageIdCanBeNullable
5. Test_CreatedAtDefaultsToCurrentTime
6. Test_UnreadCountsDefaultToZero

## Test Framework:
- Use xUnit
- Use FluentAssertions for assertions

## Output Location:
/mnt/data/Work/Programming/MainProgram/Backend/APIs/ERP/Managerial/Communication/Chat/Chat.Tests/ConversationTests.cs

## Status:
- [ ] Create test file
- [ ] Implement all test cases
- [ ] Ensure tests compile