1 files changed, 45 insertions, 0 deletions
diff --git a/lldb/packages/Python/lldbsuite/test/expression_command/no-result/TestNoResult.py b/lldb/packages/Python/lldbsuite/test/expression_command/no-result/TestNoResult.py
new file mode 100644
index 00000000000..363b30e4de5
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/expression_command/no-result/TestNoResult.py
@@ -0,0 +1,45 @@
+"""
+Test that an expression that returns no result returns a sensible error.
+"""
+
+from __future__ import print_function
+
+
+import os
+import time
+import re
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+
+
+class TestExprNoResult(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    # If your test case doesn't stress debug info, the
+    # set this to true.  That way it won't be run once for
+    # each debug info format.
+    NO_DEBUG_INFO_TESTCASE = True
+
+    def test_no_result(self):
+        """Run an expression that has no result, check the error."""
+        self.build()
+        self.main_source_file = lldb.SBFileSpec("main.c")
+        self.sample_test()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+
+    def sample_test(self):
+        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
+                                   "Set a breakpoint here", self.main_source_file)
+
+        frame = thread.GetFrameAtIndex(0)
+        result = frame.EvaluateExpression("int $x = 10")
+        # No result expressions are considered to fail:
+        self.assertTrue(result.GetError().Fail(), "An expression with no result is a failure.")
+        # But the reason should be eExpressionProducedNoResult
+        self.assertEqual(result.GetError().GetError(), lldb.eExpressionProducedNoResult, 
+                         "But the right kind of failure")