lldb/test/API/lang/cpp/union-static-data-members/TestCppUnionStaticMembers.py

"""
Tests that frame variable and expr work for
C++ unions and their static data members.
"""
import lldb
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
import lldbsuite.test.lldbutil as lldbutil


@skipIfWasm  # no expression evaluation
class CppUnionStaticMembersTestCase(TestBase):
    def test_print_union(self):
        """Tests that frame variable and expr work
        for union with static data members"""
        self.build()

        (target, process, main_thread, _) = lldbutil.run_to_source_breakpoint(
            self, "return 0", lldb.SBFileSpec("main.cpp")
        )

        self.expect("frame variable foo", substrs=["val = 42"])
        self.expect("frame variable bar", substrs=["val = 137"])

        self.expect_expr(
            "foo",
            result_type="Foo",
            result_children=[ValueCheck(name="val", value="42")],
        )
        self.expect_expr(
            "bar",
            result_type="Bar",
            result_children=[ValueCheck(name="val", value="137")],
        )

    @expectedFailureWindows
    def test_expr_union_static_members(self):
        """Tests that frame variable and expr work
        for union static data members"""
        self.build()

        (target, process, main_thread, _) = lldbutil.run_to_source_breakpoint(
            self, "return 0", lldb.SBFileSpec("main.cpp")
        )

        self.expect_expr("Foo::sVal1", result_type="const int", result_value="-42")
        self.expect_expr(
            "Foo::sVal2",
            result_type="Foo",
            result_children=[ValueCheck(name="val", value="42")],
        )

    @expectedFailureWindows
    def test_union_in_anon_namespace(self):
        """Tests that frame variable and expr work
        for union static data members in anonymous
        namespaces"""
        self.build()

        (target, process, main_thread, _) = lldbutil.run_to_source_breakpoint(
            self, "return 0", lldb.SBFileSpec("main.cpp")
        )

        self.expect_expr("Bar::sVal1", result_type="const int", result_value="-137")
        self.expect_expr(
            "Bar::sVal2",
            result_type="Bar",
            result_children=[ValueCheck(name="val", value="137")],
        )