Add Unit Tests (#4)

.github/PULL_REQUEST_TEMPLATE.md

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+## 📝 PR Type
+
+- [ ] Add new sample
+- [ ] Update existing sample
+- [ ] Add new test cases
+- [ ] Fix test failures
+- [ ] Documentation/Configuration update
+
+---
+
+## 📚 Description
+
+[Please briefly describe the background, changes, and purpose of this PR. For example:
+- Added `game_werewolves` to demonstrate XYZ functionality in `agentscope`.
+- Fixed test failures in `game_test.py` caused by `agentscope` interface changes.
+- Updated dependency installation instructions in `README.md` of `agentscope-samples`.]
+
+---
+
+## 🧪 Testing Validation
+
+[Please explain how to validate the changes:
+1. How to run the added/modified test cases?
+2. Is integration testing with `agentscope` required?
+3. Has code been formatted (e.g., `pre-commit`)?]
+
+---
+
+## ✅ Checklist
+
+Please complete the following checks before submitting the PR:
+
+- [ ] All sample code has been formatted with `pre-commit run --all-files`
+- [ ] All new/modified test cases have passed (run `pytest tests/`)
+- [ ] Test coverage has not decreased (if applicable)
+- [ ] Sample code follows `agentscope` best practices (e.g., config management, logging)
+- [ ] Related documentation in `agentscope-samples` has been updated (e.g., `README.md`)