xref: /llvm-project/lldb/test/API/commands/expression/po_persistent_result/TestPoPersistentResult.py (revision e0528382b570bb18b438c20eadad34f8857a69a8)
1"""
2Test behavior of `po` and persistent results.
3"""
4
5import lldb
6from lldbsuite.test.lldbtest import *
7from lldbsuite.test.decorators import *
8from lldbsuite.test import lldbutil
9
10
11class 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 = "])
36