Add test files

tests/test_refactoring.py

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+"""Tests for refactoring analyzer module."""
+
+import pytest
+from unittest.mock import Mock, patch
+
+from shellgenius.refactoring import (
+    RefactoringAnalyzer,
+    RefactoringIssue,
+    RefactoringResult,
+    SecurityRulesDB,
+    refactor_script,
+)
+
+
+class TestSecurityRulesDB:
+    def test_get_rules(self):
+        """Test getting all security rules."""
+        rules = SecurityRulesDB.get_rules()
+        
+        assert len(rules) > 0
+        assert any(r["id"] == "CWE-78" for r in rules)
+    
+    def test_check_rule_shell_injection(self):
+        """Test detection of shell injection patterns."""
+        dangerous_line = 'rm -rf $dir'
+        
+        rule = SecurityRulesDB.check_rule(dangerous_line)
+        
+        assert rule is not None
+        assert rule["severity"] == "high"
+    
+    def test_check_rule_no_match(self):
+        """Test that safe commands don't match rules."""
+        safe_line = "ls -la"
+        
+        rule = SecurityRulesDB.check_rule(safe_line)
+        
+        assert rule is None
+
+
+class TestRefactoringAnalyzer:
+    def test_analyze_safe_script(self):
+        """Test analyzing a safe script."""
+        with patch('shellgenius.refactoring.get_ollama_client') as mock_client:
+            mock_client.return_value.generate.return_value = {"success": False}
+            
+            safe_script = "#!/bin/bash\nset -euo pipefail\necho hello"
+            
+            analyzer = RefactoringAnalyzer()
+            result = analyzer.analyze(safe_script, include_suggestions=False)
+            
+            assert result.score >= 90
+            assert len(result.issues) == 0
+    
+    def test_analyze_unsafe_script(self):
+        """Test analyzing a script with security issues."""
+        with patch('shellgenius.refactoring.get_ollama_client') as mock_client:
+            mock_client.return_value.generate.return_value = {"success": False}
+            
+            unsafe_script = "#!/bin/bash\nchmod 777 /tmp/sensitive"
+            
+            analyzer = RefactoringAnalyzer()
+            result = analyzer.analyze(unsafe_script, include_suggestions=False)
+            
+            assert result.score < 100
+            assert len(result.issues) > 0
+    
+    def test_calculate_score(self):
+        """Test security score calculation."""
+        with patch('shellgenius.refactoring.get_ollama_client') as mock_client:
+            mock_client.return_value.generate.return_value = {"success": False}
+            
+            analyzer = RefactoringAnalyzer()
+            
+            critical_issue = RefactoringIssue(
+                line_number=1,
+                original="eval $user_input",
+                issue_type="Eval with User Input",
+                severity="critical",
+                description="Eval with variable input",
+                risk_assessment="Shell injection vulnerability",
+                suggestion="Avoid eval",
+                safer_alternative="Use direct variable",
+            )
+            
+            score = analyzer._calculate_score([critical_issue], "script")
+            
+            assert score <= 75
+    
+    def test_generate_safer_script(self):
+        """Test generation of safer script version."""
+        with patch('shellgenius.refactoring.get_ollama_client') as mock_client:
+            mock_client.return_value.generate.return_value = {"success": False}
+            
+            analyzer = RefactoringAnalyzer()
+            
+            unsafe_script = "chmod 777 /tmp/file"
+            
+            critical_issue = RefactoringIssue(
+                line_number=1,
+                original=unsafe_script,
+                issue_type="Insecure File Permissions",
+                severity="high",
+                description="World-writable permissions",
+                risk_assessment="Security vulnerability",
+                suggestion="Use chmod 755",
+                safer_alternative="chmod 755 /tmp/file",
+            )
+            
+            safer = analyzer._generate_safer_script(unsafe_script, [critical_issue])
+            
+            assert "755" in safer
+
+
+class TestRefactorScript:
+    def test_convenience_function(self):
+        """Test the convenience function for refactoring."""
+        with patch('shellgenius.refactoring.get_ollama_client') as mock_client:
+            mock_client.return_value.generate.return_value = {"success": False}
+            
+            result = refactor_script("echo hello", include_suggestions=False)
+            
+            assert isinstance(result, RefactoringResult)