packages/Python/lldbsuite/test/lang/objc/objc-property/TestObjCProperty.py

   1 """
   2 Use lldb Python API to verify that expression evaluation for property references uses the correct getters and setters
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8
   9 import os, time
  10 import re
  11 import lldb
  12 import lldbsuite.test.lldbutil as lldbutil
  13 from lldbsuite.test.lldbtest import *
  14
  15 class ObjCPropertyTestCase(TestBase):
  16
  17     mydir = TestBase.compute_mydir(__file__)
  18
  19     def setUp(self):
  20         # Call super's setUp().
  21         TestBase.setUp(self)
  22
  23         # Find the line number to break for main.c.
  24         self.source_name = 'main.m'
  25
  26     @skipUnlessDarwin
  27     @add_test_categories(['pyapi'])
  28     def test_objc_properties(self):
  29         """Test that expr uses the correct property getters and setters"""
  30         if self.getArchitecture() == 'i386':
  31             self.skipTest("requires modern objc runtime")
  32
  33         self.build()
  34         exe = os.path.join(os.getcwd(), "a.out")
  35
  36         # Create a target from the debugger.
  37
  38         target = self.dbg.CreateTarget (exe)
  39         self.assertTrue(target, VALID_TARGET)
  40
  41         # Set up our breakpoints:
  42
  43         main_bkpt = target.BreakpointCreateBySourceRegex ("Set a breakpoint here.", lldb.SBFileSpec (self.source_name))
  44         self.assertTrue(main_bkpt and
  45                         main_bkpt.GetNumLocations() == 1,
  46                         VALID_BREAKPOINT)
  47
  48         # Now launch the process, and do not stop at the entry point.
  49         process = target.LaunchSimple (None, None, self.get_process_working_directory())
  50
  51         self.assertTrue(process.GetState() == lldb.eStateStopped,
  52                         PROCESS_STOPPED)
  53
  54         threads = lldbutil.get_threads_stopped_at_breakpoint (process, main_bkpt)
  55         self.assertTrue (len(threads) == 1)
  56         thread = threads[0]
  57         frame = thread.GetFrameAtIndex(0)
  58
  59         mine = frame.FindVariable ("mine")
  60         self.assertTrue (mine.IsValid())
  61         access_count = mine.GetChildMemberWithName ("_access_count")
  62         self.assertTrue (access_count.IsValid())
  63         start_access_count = access_count.GetValueAsUnsigned (123456)
  64         self.assertTrue (start_access_count != 123456)
  65
  66         #
  67         # The first set of tests test calling the getter & setter of
  68         # a property that actually only has a getter & setter and no
  69         # @property.
  70         #
  71         nonexistant_value = frame.EvaluateExpression("mine.nonexistantInt", False)
  72         nonexistant_error = nonexistant_value.GetError()
  73         self.assertTrue (nonexistant_error.Success())
  74         nonexistant_int = nonexistant_value.GetValueAsUnsigned (123456)
  75         self.assertTrue (nonexistant_int == 6)
  76
  77         # Calling the getter function would up the access count, so make sure that happened.
  78
  79         new_access_count = access_count.GetValueAsUnsigned (123456)
  80         self.assertTrue (new_access_count - start_access_count == 1)
  81         start_access_count = new_access_count
  82
  83         #
  84         # Now call the setter, then make sure that
  85         nonexistant_change = frame.EvaluateExpression("mine.nonexistantInt = 10", False)
  86         nonexistant_error = nonexistant_change.GetError()
  87         self.assertTrue (nonexistant_error.Success())
  88
  89         # Calling the setter function would up the access count, so make sure that happened.
  90
  91         new_access_count = access_count.GetValueAsUnsigned (123456)
  92         self.assertTrue (new_access_count - start_access_count == 1)
  93         start_access_count = new_access_count
  94
  95         #
  96         # Now we call the getter of a property that is backed by an ivar,
  97         # make sure it works and that we actually update the backing ivar.
  98         #
  99
 100         backed_value = frame.EvaluateExpression("mine.backedInt", False)
 101         backed_error = backed_value.GetError()
 102         self.assertTrue (backed_error.Success())
 103         backing_value = mine.GetChildMemberWithName ("_backedInt")
 104         self.assertTrue (backing_value.IsValid())
 105         self.assertTrue (backed_value.GetValueAsUnsigned (12345) == backing_value.GetValueAsUnsigned(23456))
 106
 107         unbacked_value = frame.EvaluateExpression("mine.unbackedInt", False)
 108         unbacked_error = unbacked_value.GetError()
 109         self.assertTrue (unbacked_error.Success())
 110
 111         idWithProtocol_value = frame.EvaluateExpression("mine.idWithProtocol", False)
 112         idWithProtocol_error = idWithProtocol_value.GetError()
 113         self.assertTrue (idWithProtocol_error.Success())
 114         self.assertTrue (idWithProtocol_value.GetTypeName() == "id")