"""
Test example snippets from the lldb 'help expression' output.
"""

from __future__ import print_function


import os
import time
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class Radar9673644TestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    def setUp(self):
        # Call super's setUp().
        TestBase.setUp(self)
        # Find the line number to break inside main().
        self.main_source = "main.c"
        self.line = line_number(self.main_source, '// Set breakpoint here.')

    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr21765")
    def test_expr_commands(self):
        """The following expression commands should just work."""
        self.build()

        self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)

        lldbutil.run_break_set_by_file_and_line(
            self,
            self.main_source,
            self.line,
            num_expected_locations=1,
            loc_exact=True)

        self.runCmd("run", RUN_SUCCEEDED)

        # rdar://problem/9673664 lldb expression evaluation problem

        self.expect('expr char str[] = "foo"; str[0]',
                    substrs=["'f'"])
        # runCmd: expr char c[] = "foo"; c[0]
        # output: (char) $0 = 'f'