Add test suites for all 4 languages

[thatsjet]

Summary

No tests exist for any language implementation. Add comprehensive test suites that validate the same behaviors across all 4 languages to ensure cross-language consistency.

Test Matrix

Every language must test these scenarios:

#	Test Case	Expected Behavior
1	Construct with default YAML path	Logger loads all 46 events
2	Construct with explicit YAML path	Custom path works
3	Construct with nonexistent YAML path	Raises/throws appropriate error
4	Construct with corrupt/invalid YAML	Raises/throws appropriate error
5	Log one event per category (10 categories)	Correct output for each
6	Event string format	event_type:param1,param2
7	Required fields always present	datetime, appid, event, level, description
8	Each optional field populates (10 fields)	useragent, source_ip, host_ip, hostname, protocol, port, request_uri, request_method, region, geo
9	Custom fields passthrough	Extra kwargs/options appear in output
10	Description override via options	Custom description replaces default
11	Empty params list	Event string has no colon suffix
12	Unknown event type	Raises/throws with descriptive message
13	List all events	Returns 46 event names
14	List by category filter	"Authentication" returns 10 events
15	List by nonexistent category	Returns empty list
16	Get event info — valid type	Returns correct category, prefix, level, description, parameters
17	Get event info — invalid type	Raises/throws with descriptive message
18	Log level correctness	INFO events → INFO, WARN → WARN, CRITICAL → CRITICAL
19	Datetime format	Matches ^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\+00:00$ (see issue #3)

Per-Language Instructions

Python

• File: python/tests/test_security_event_logger.py
• Framework: pytest
• Setup: Add [project.optional-dependencies] dev = ["pytest>=7.0"] to pyproject.toml
• Run: cd python && pytest tests/
• Fixture: Use @pytest.fixture to create logger with explicit path to ../security_events.yaml
• Create python/tests/__init__.py (empty)

Node.js

• File: nodejs/tests/security_event_logger.test.js
• Framework: Jest
• Setup: npm install --save-dev jest and update package.json scripts: "test": "jest"
• Run: cd nodejs && npx jest

Go

• File: golang/security_event_logger_test.go
• Framework: Standard testing package
• Run: cd golang && go test -v ./...
• Use t.Run() subtests for organized output
• No external test dependencies needed

Java

• File: java/src/test/java/com/securityeventlogger/SecurityEventLoggerTest.java
• Framework: JUnit 5
• Setup: Add to pom.xml:

  <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter</artifactId>
      <version>5.10.2</version>
      <scope>test</scope>
  </dependency>

  Add maven-surefire-plugin for test execution.
• Run: cd java && mvn test

Verification

• All 4 test suites pass
• Each test suite covers all 19 scenarios above
• Test output is readable (descriptive test names)