"""
Test std::forward_list functionality with a decl from debug info as content.
"""

from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class TestDbgInfoContentForwardList(TestBase):

    @add_test_categories(["libc++"])
    @skipIf(compiler=no_match("clang"))
    def test(self):
        self.build()

        lldbutil.run_to_source_breakpoint(self,
                                          "// Set break point at this line.",
                                          lldb.SBFileSpec("main.cpp"))

        self.runCmd("settings set target.import-std-module true")

        list_type = "std::forward_list<Foo>"
        value_type = list_type + "::value_type"

        # FIXME: This has three elements in it but the formatter seems to
        # calculate the wrong size and contents.
        self.expect_expr("a", result_type=list_type, result_summary="size=1")
        self.expect_expr("std::distance(a.begin(), a.end())", result_value="3")
        self.expect_expr("a.front().a", result_type="int", result_value="3")
        self.expect_expr("a.begin()->a", result_type="int", result_value="3")

        # FIXME: The value here isn't actually empty.
        self.expect_expr("a.front()",
                         result_type=value_type,
                         result_children=[ValueCheck()])