Summary

• Migrates msgpack-jackson tests from JUnit 4 to JUnit 5
• Resolves all JUnit deprecation warnings
• Maintains test functionality and backward compatibility

Changes Made

• Dependencies: Updated build.sbt to use JUnit 5 Jupiter and Vintage engines
• Imports: Replaced JUnit 4 imports with JUnit 5 equivalents
• Annotations:
  • @Test → @Test (JUnit 5)
  • @Before → @BeforeEach
  • @Test(expected=Exception.class) → assertThrows(Exception.class, () -> {...})
• Assertions: Replaced deprecated org.junit.Assert.assertThat with org.hamcrest.MatcherAssert.assertThat

Test Results

✅ All tests pass successfully
✅ No more JUnit deprecation warnings
✅ Compilation successful

Backward Compatibility

The JUnit Vintage engine is included to maintain compatibility with any remaining JUnit 4 tests.

🤖 Generated with Claude Code