1 files changed, 54 insertions, 0 deletions
diff --git a/tests/analysis/scan/common.py b/tests/analysis/scan/common.py
new file mode 100644
index 0000000..507b7e2
--- /dev/null
+++ b/tests/analysis/scan/common.py
@@ -0,0 +1,54 @@
+
+from chrysacase import ChrysalideTestCase
+from pychrysalide.analysis.contents import MemoryContent
+from pychrysalide.analysis.scan import ContentScanner
+from pychrysalide.analysis.scan import ScanOptions
+from pychrysalide.analysis.scan.patterns.backends import AcismBackend
+
+
+class RostTestClass(ChrysalideTestCase):
+    """TestCase for analysis.scan.ScanExpression."""
+
+    @classmethod
+    def setUpClass(cls):
+
+        super(RostTestClass, cls).setUpClass()
+
+        cls._options = ScanOptions()
+        cls._options.backend_for_data = AcismBackend
+
+        cls._empty_content = MemoryContent(b'')
+
+
+    def _validate_rule_result(self, rule, content, expected):
+        """Check for scan success or failure."""
+
+        scanner = ContentScanner(rule)
+        ctx = scanner.analyze(self._options, content)
+
+        self.assertIsNotNone(ctx)
+
+        if expected:
+            self.assertTrue(ctx.has_match_for_rule('test'))
+        else:
+            self.assertFalse(ctx.has_match_for_rule('test'))
+
+        return scanner, ctx
+
+
+    def check_rule_success(self, rule, content = None):
+        """Check for scan success."""
+
+        if content is None:
+            content = self._empty_content
+
+        self._validate_rule_result(rule, content, True)
+
+
+    def check_rule_failure(self, rule, content = None):
+        """Check for scan failure."""
+
+        if content is None:
+            content = self._empty_content
+
+        self._validate_rule_result(rule, content, False)