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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 TestScanExpressions(ChrysalideTestCase):
"""TestCase for analysis.scan.exprs.*."""
@classmethod
def setUpClass(cls):
super(TestScanExpressions, cls).setUpClass()
cls._options = ScanOptions()
cls._options.backend_for_data = AcismBackend
def testBasicStringOperations(self):
"""Evaluate basic string operations."""
cnt = MemoryContent(b'empty')
rule = '''
rule test {
condition:
"123abc456" contains "abc"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertTrue(ctx.has_match_for_rule('test'))
rule = '''
rule test {
condition:
"123\t456" contains "\t"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertTrue(ctx.has_match_for_rule('test'))
rule = '''
rule test {
condition:
"123-456" startswith "1"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertTrue(ctx.has_match_for_rule('test'))
rule = '''
rule test {
condition:
"123-456" startswith "1234"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertFalse(ctx.has_match_for_rule('test'))
rule = '''
rule test {
condition:
"123-456" endswith "6"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertTrue(ctx.has_match_for_rule('test'))
rule = '''
rule test {
condition:
"123-456" endswith "3456"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertFalse(ctx.has_match_for_rule('test'))
rule = '''
rule test {
condition:
"ABCD" iequals "AbCd"
}
'''
scanner = ContentScanner(rule)
ctx = scanner.analyze(self._options, cnt)
self.assertTrue(ctx.has_match_for_rule('test'))
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