Reduce tests suite side effects

Author: elicn

tests/test_elf.py

@@ -93,6 +93,8 @@ def dump(ql):
         ql.run(begin=hook_address)
         del ql
 
+        os.remove(snapshot)
+
     def test_elf_linux_x86_snapshot_restore_reg(self):
         self._test_elf_linux_x86_snapshot_restore_common(reg=True, ctx=False)
 

tests/test_elf_multithread.py

@@ -29,9 +29,6 @@ def test_elf_linux_execve_x8664(self):
 
 
     def test_elf_linux_cloexec_x8664(self):
-        with open('../examples/rootfs/x8664_linux/testfile', 'wb') as f:
-            f.write(b'0123456789')
-
         ql = Qiling(["../examples/rootfs/x8664_linux/bin/x8664_cloexec_test"],  
                     "../examples/rootfs/x8664_linux", 
                     verbose=QL_VERBOSE.DEBUG,