import pytest
from datetime import datetime
from src.models import Commit


class TestCommitPatternAnalyzer:
    def test_analyze_empty_repo(self):
        from src.analyzers import GitRepository
        repo = GitRepository("/fake/path")
        from src.analyzers import CommitPatternAnalyzer
        analyzer = CommitPatternAnalyzer(repo, days=30)
        result = analyzer.analyze()
        assert result is None


class TestCodeChurnAnalyzer:
    def test_analyze_empty_repo(self):
        from src.analyzers import GitRepository
        repo = GitRepository("/fake/path")
        from src.analyzers import CodeChurnAnalyzer
        analyzer = CodeChurnAnalyzer(repo, days=30)
        result = analyzer.analyze()
        assert result is None


class TestVelocityAnalyzer:
    def test_analyze_empty_repo(self):
        from src.analyzers import GitRepository
        repo = GitRepository("/fake/path")
        from src.analyzers import VelocityAnalyzer
        analyzer = VelocityAnalyzer(repo, days=30)
        result = analyzer.analyze()
        assert result is None


class TestRiskyCommitDetector:
    def test_detect_no_commits(self):
        from src.analyzers import GitRepository
        repo = GitRepository("/fake/path")
        from src.analyzers import RiskyCommitDetector
        detector = RiskyCommitDetector(repo, days=30)
        result = detector.analyze()
        assert result is None