add regress for keystone-engine#226

suite/regress/x86_lea_three.py

@@ -0,0 +1,26 @@
+#!/usr/bin/python
+# Ryan Hileman, 2016
+
+# This is to test three-operand relative addressing using symbol math.
+
+# Github issue: #226
+# Author: Ryan Hileman
+
+from keystone import *
+
+import regress
+
+
+class TestX86Nasm(regress.RegressTest):
+    def runTest(self):
+        # Initialize Keystone engine
+        ks = Ks(KS_ARCH_X86, KS_MODE_32)
+        # change the syntax to NASM
+        ks.syntax = KS_OPT_SYNTAX_NASM
+
+        # [eax + b - a] should assemble to [eax + length], or [eax + 6] here
+        encoding, count = ks.asm(b"a:\nlea eax, [eax + b - a]\nb:")
+        self.assertEqual(encoding, [ 141, 128, 6, 0, 0, 0 ])
+
+if __name__ == '__main__':
+    regress.main()