features: Add tests for limiting memory in retdec-decompiler.sh (--ma…

…x-memory and --no-memory-limit).

features/max-memory/test.py

@@ -0,0 +1,86 @@
+from regression_tests import *
+
+
+class TestDefaultLimit(Test):
+    """Checks that retdec-decompiler.sh correctly decompiles a binary file when
+    there is the default memory limit (half of system RAM).
+
+    Test for https://github.com/avast-tl/retdec/issues/270
+    """
+
+    settings = TestSettings(
+        input='ack.ex',
+    )
+
+    def test_correctly_decompiled_file(self):
+        # The check whether the decompilation was successful is done
+        # automatically during setUp(), so we only check that the default
+        # memory limit has been set.
+        # For fileinfo:
+        self.assertIn('--max-memory-half-ram', self.decompiler.output)
+        # For bin2llvmir and llvmir2hll:
+        self.assertIn(' -max-memory-half-ram', self.decompiler.output)
+
+
+class TestCustomSufficientLimit(Test):
+    """Checks that retdec-decompiler.sh correctly decompiles a binary file when
+    there is a custom memory limit (but sufficient).
+
+    Test for https://github.com/avast-tl/retdec/issues/270
+    """
+
+    settings = TestSettings(
+        input='ack.ex',
+        args='--max-memory 107374182400',  # 1 GB
+    )
+
+    def test_correctly_decompiled_file(self):
+        # The check whether the decompilation was successful is done
+        # automatically during setUp(), so we only check that the memory limit
+        # has been set.
+        # For fileinfo:
+        self.assertIn('--max-memory 107374182400', self.decompiler.output)
+        # For bin2llvmir and llvmir2hll:
+        self.assertIn(' -max-memory 107374182400', self.decompiler.output)
+
+
+class TestCustomInsufficientLimit(Test):
+    """Checks that retdec-decompiler.sh fails to decompile a binary file when
+    the maximal memory limit is too low.
+
+    Test for https://github.com/avast-tl/retdec/issues/270
+    """
+
+    settings = TestSettings(
+        input='ack.ex',
+        args='--max-memory 100',  # 100 bytes
+    )
+
+    def setUp(self):
+        # Fail expected.
+        pass
+
+    def test_failed_to_decompile_file(self):
+        self.assertNotEqual(self.decompiler.return_code, 0)
+
+
+class TestNoLimit(Test):
+    """Checks that retdec-decompiler.sh correctly decompiles a binary file when
+    there is no memory limit.
+
+    Test for https://github.com/avast-tl/retdec/issues/270
+    """
+
+    settings = TestSettings(
+        input='ack.ex',
+        args='--no-memory-limit',
+    )
+
+    def test_correctly_decompiled_file(self):
+        # The check whether the decompilation was successful is done
+        # automatically during setUp(), so we only check that no memory limit
+        # has been set.
+        # For fileinfo:
+        self.assertNotIn('--max-memory', self.decompiler.output)
+        # For bin2llvmir and llvmir2hll:
+        self.assertNotIn(' -max-memory', self.decompiler.output)