"""
Check if changing Format on an SBValue correctly propagates that new format to children as it should
"""

from __future__ import print_function


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


class FormatPropagationTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    def setUp(self):
        # Call super's setUp().
        TestBase.setUp(self)
        # Find the line number to break at.
        self.line = line_number('main.cpp', '// Set break point at this line.')

    # rdar://problem/14035604
    def test_with_run_command(self):
        """Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
        self.build()
        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)

        lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)

        self.runCmd("run", RUN_SUCCEEDED)

        # The stop reason of the thread should be breakpoint.
        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
                    substrs=['stopped',
                             'stop reason = breakpoint'])

        # This is the function to remove the custom formats in order to have a
        # clean slate for the next test case.
        def cleanup():
            pass

        # Execute the cleanup function during test case tear down.
        self.addTearDownHook(cleanup)

        # extract the parent and the children
        frame = self.frame()
        parent = self.frame().FindVariable("f")
        self.assertTrue(
            parent is not None and parent.IsValid(),
            "could not find f")
        X = parent.GetChildMemberWithName("X")
        self.assertTrue(X is not None and X.IsValid(), "could not find X")
        Y = parent.GetChildMemberWithName("Y")
        self.assertTrue(Y is not None and Y.IsValid(), "could not find Y")
        # check their values now
        self.assertTrue(X.GetValue() == "1", "X has an invalid value")
        self.assertTrue(Y.GetValue() == "2", "Y has an invalid value")
        # set the format on the parent
        parent.SetFormat(lldb.eFormatHex)
        self.assertTrue(
            X.GetValue() == "0x00000001",
            "X has not changed format")
        self.assertTrue(
            Y.GetValue() == "0x00000002",
            "Y has not changed format")
        # Step and check if the values make sense still
        self.runCmd("next")
        self.assertTrue(X.GetValue() == "0x00000004", "X has not become 4")
        self.assertTrue(Y.GetValue() == "0x00000002", "Y has not stuck as hex")
        # Check that children can still make their own choices
        Y.SetFormat(lldb.eFormatDecimal)
        self.assertTrue(X.GetValue() == "0x00000004", "X is still hex")
        self.assertTrue(Y.GetValue() == "2", "Y has not been reset")
        # Make a few more changes
        parent.SetFormat(lldb.eFormatDefault)
        X.SetFormat(lldb.eFormatHex)
        Y.SetFormat(lldb.eFormatDefault)
        self.assertTrue(
            X.GetValue() == "0x00000004",
            "X is not hex as it asked")
        self.assertTrue(Y.GetValue() == "2", "Y is not defaulted")
