[lldbtest] Add an "expected_cmd_failure" option to the filecheck helper

llvm-svn: 371544

1 files changed, 5 insertions, 1 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
index 4b10331d42c..313823b47f6 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -2207,12 +2207,16 @@ class TestBase(Base):
             self,
             command,
             check_file,
-            filecheck_options = ''):
+            filecheck_options = '',
+            expect_cmd_failure = False):
         # Run the command.
         self.runCmd(
                 command,
+                check=(not expect_cmd_failure),
                 msg="FileCheck'ing result of `{0}`".format(command))
 
+        self.assertTrue((not expect_cmd_failure) == self.res.Succeeded())
+
         # Get the error text if there was an error, and the regular text if not.
         output = self.res.GetOutput() if self.res.Succeeded() \
                 else self.res.GetError()