lldb/test/API/commands/expression/po_persistent_result/TestPoPersistentResult.py

   1 """
   2 Test behavior of `po` and persistent results.
   3 """
   4
   5 import lldb
   6 from lldbsuite.test.lldbtest import *
   7 from lldbsuite.test.decorators import *
   8 from lldbsuite.test import lldbutil
   9
  10
  11 class TestCase(TestBase):
  12     def setUp(self):
  13         TestBase.setUp(self)
  14         self.build()
  15         lldbutil.run_to_source_breakpoint(self, "break here", lldb.SBFileSpec("main.m"))
  16
  17     @skipUnlessDarwin
  18     def test_po_does_not_print_persistent_result(self):
  19         """Test `po` doesn't advertise a persistent result variable."""
  20         self.expect("po obj", matching=False, substrs=["$0 = "])
  21
  22     @skipUnlessDarwin
  23     def test_po_does_not_keep_persistent_result(self):
  24         """Test `po` doesn't leak a persistent result variable."""
  25         self.expect("po obj")
  26         # Verify `po` used a temporary persistent result. In other words, there
  27         # should be no $0 at this point.
  28         self.expect("expression $0", error=True)
  29         self.expect("expression obj", substrs=["$0 = "])
  30
  31     @skipUnlessDarwin
  32     def test_expression_description_verbosity(self):
  33         """Test printing object description _and_ opt-in to persistent results."""
  34         self.expect("expression -O -vfull -- obj", substrs=["$0 = "])
  35         self.expect("expression $0", substrs=["$0 = "])