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"""
Use lldb Python API to verify that expression evaluation for property references uses the correct getters and setters
"""
from __future__ import print_function
import os, time
import re
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class ObjCPropertyTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break for main.c.
self.source_name = 'main.m'
@skipUnlessDarwin
@add_test_categories(['pyapi'])
def test_objc_properties(self):
"""Test that expr uses the correct property getters and setters"""
if self.getArchitecture() == 'i386':
self.skipTest("requires modern objc runtime")
self.build()
exe = os.path.join(os.getcwd(), "a.out")
# Create a target from the debugger.
target = self.dbg.CreateTarget (exe)
self.assertTrue(target, VALID_TARGET)
# Set up our breakpoints:
main_bkpt = target.BreakpointCreateBySourceRegex ("Set a breakpoint here.", lldb.SBFileSpec (self.source_name))
self.assertTrue(main_bkpt and
main_bkpt.GetNumLocations() == 1,
VALID_BREAKPOINT)
# Now launch the process, and do not stop at the entry point.
process = target.LaunchSimple (None, None, self.get_process_working_directory())
self.assertTrue(process.GetState() == lldb.eStateStopped,
PROCESS_STOPPED)
threads = lldbutil.get_threads_stopped_at_breakpoint (process, main_bkpt)
self.assertTrue (len(threads) == 1)
thread = threads[0]
frame = thread.GetFrameAtIndex(0)
mine = frame.FindVariable ("mine")
self.assertTrue (mine.IsValid())
access_count = mine.GetChildMemberWithName ("_access_count")
self.assertTrue (access_count.IsValid())
start_access_count = access_count.GetValueAsUnsigned (123456)
self.assertTrue (start_access_count != 123456)
#
# The first set of tests test calling the getter & setter of
# a property that actually only has a getter & setter and no
# @property.
#
nonexistant_value = frame.EvaluateExpression("mine.nonexistantInt", False)
nonexistant_error = nonexistant_value.GetError()
self.assertTrue (nonexistant_error.Success())
nonexistant_int = nonexistant_value.GetValueAsUnsigned (123456)
self.assertTrue (nonexistant_int == 6)
# Calling the getter function would up the access count, so make sure that happened.
new_access_count = access_count.GetValueAsUnsigned (123456)
self.assertTrue (new_access_count - start_access_count == 1)
start_access_count = new_access_count
#
# Now call the setter, then make sure that
nonexistant_change = frame.EvaluateExpression("mine.nonexistantInt = 10", False)
nonexistant_error = nonexistant_change.GetError()
self.assertTrue (nonexistant_error.Success())
# Calling the setter function would up the access count, so make sure that happened.
new_access_count = access_count.GetValueAsUnsigned (123456)
self.assertTrue (new_access_count - start_access_count == 1)
start_access_count = new_access_count
#
# Now we call the getter of a property that is backed by an ivar,
# make sure it works and that we actually update the backing ivar.
#
backed_value = frame.EvaluateExpression("mine.backedInt", False)
backed_error = backed_value.GetError()
self.assertTrue (backed_error.Success())
backing_value = mine.GetChildMemberWithName ("_backedInt")
self.assertTrue (backing_value.IsValid())
self.assertTrue (backed_value.GetValueAsUnsigned (12345) == backing_value.GetValueAsUnsigned(23456))
unbacked_value = frame.EvaluateExpression("mine.unbackedInt", False)
unbacked_error = unbacked_value.GetError()
self.assertTrue (unbacked_error.Success())
idWithProtocol_value = frame.EvaluateExpression("mine.idWithProtocol", False)
idWithProtocol_error = idWithProtocol_value.GetError()
self.assertTrue (idWithProtocol_error.Success())
self.assertTrue (idWithProtocol_value.GetTypeName() == "id")
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