fix: update test imports to use gitignore_generator module instead of src

tests/test_validator.py

@@ -0,0 +1,63 @@
+from gitignore_generator.validator import validator, Validator, ValidationIssue
+
+
+class TestValidator:
+    def test_validate_empty_content(self):
+        result = validator.validate_content("")
+        assert len(result) == 0
+
+    def test_validate_valid_patterns(self):
+        content = "__pycache__\n*.pyc\n*.log"
+        issues = validator.validate_content(content)
+        assert len(issues) == 0
+
+    def test_validate_trailing_slash(self):
+        content = "dir/"
+        issues = validator.validate_content(content)
+        assert len(issues) > 0
+        assert any(i.issue_type == "trailing_slash" for i in issues)
+
+    def test_validate_backslash_escape(self):
+        content = "pattern\\n"
+        issues = validator.validate_content(content)
+        assert len(issues) > 0
+        assert any(i.issue_type == "invalid_escape" for i in issues)
+
+    def test_validate_duplicate_patterns(self):
+        content = "__pycache__\n__pycache__"
+        issues = validator.validate_content(content)
+        assert len(issues) > 0
+        assert any(i.issue_type == "duplicate" for i in issues)
+
+    def test_validate_wildcard_usage(self):
+        content = "a/**/b"
+        issues = validator.validate_content(content)
+        assert len(issues) > 0
+        assert any(i.issue_type == "double_star" for i in issues)
+
+    def test_is_valid_valid(self):
+        assert validator.is_valid("__pycache__\n*.pyc")
+
+    def test_is_valid_invalid(self):
+        assert not validator.is_valid("pattern\\n")
+
+    def test_get_summary(self):
+        content = "__pycache__\n*.pyc"
+        summary = validator.get_summary(content)
+        assert summary["valid"]
+        assert summary["errors"] == 0
+        assert summary["warnings"] == 0
+
+    def test_validate_pattern(self):
+        issue = validator.validate_pattern("valid_pattern")
+        assert issue is None
+
+    def test_validate_pattern_invalid(self):
+        issue = validator.validate_pattern("pattern\\n")
+        assert issue is not None
+        assert issue.severity == "error"
+
+    def test_init_validator(self):
+        v = Validator()
+        assert v.issues == []
+        assert v.warnings == []