tests/fswatcher/fswatchertest.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/fswatcher/fswatchertest.cpp
   3 // Purpose:     wxFileSystemWatcher unit test
   4 // Author:      Bartosz Bekier
   5 // Created:     2009-06-11
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2009 Bartosz Bekier
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #include "wx/evtloop.h"
  21 #include "wx/filename.h"
  22 #include "wx/filefn.h"
  23 #include "wx/stdpaths.h"
  24 #include "wx/fswatcher.h"
  25
  26 #include "testfile.h"
  27
  28 // ----------------------------------------------------------------------------
  29 // local functions
  30 // ----------------------------------------------------------------------------
  31
  32 // class generating file system events
  33 class EventGenerator
  34 {
  35 public:
  36     static EventGenerator& Get()
  37     {
  38         if (!ms_instance)
  39             ms_instance = new EventGenerator(GetWatchDir());
  40
  41         return *ms_instance;
  42     }
  43
  44     EventGenerator(const wxFileName& path) : m_base(path)
  45     {
  46         m_old = wxFileName();
  47         m_file = RandomName();
  48         m_new = RandomName();
  49     }
  50
  51     // operations
  52     bool CreateFile()
  53     {
  54         wxFile file(m_file.GetFullPath(), wxFile::write);
  55         return file.IsOpened() && m_file.FileExists();
  56     }
  57
  58     bool RenameFile()
  59     {
  60         CPPUNIT_ASSERT(m_file.FileExists());
  61
  62         wxLogDebug("Renaming %s=>%s", m_file.GetFullPath(), m_new.GetFullPath());
  63
  64         bool ret = wxRenameFile(m_file.GetFullPath(), m_new.GetFullPath());
  65         if (ret)
  66         {
  67             m_old = m_file;
  68             m_file = m_new;
  69             m_new = RandomName();
  70         }
  71
  72         return ret;
  73     }
  74
  75     bool DeleteFile()
  76     {
  77         CPPUNIT_ASSERT(m_file.FileExists());
  78
  79         bool ret =  wxRemoveFile(m_file.GetFullPath());
  80         if (ret)
  81         {
  82             m_old = m_file;
  83             m_file = m_new;
  84             m_new = RandomName();
  85         }
  86
  87         return ret;
  88     }
  89
  90     bool TouchFile()
  91     {
  92         return m_file.Touch();
  93     }
  94
  95     bool ReadFile()
  96     {
  97         wxFile f(m_file.GetFullPath());
  98         CPPUNIT_ASSERT(f.IsOpened());
  99
 100         char buf[1];
 101         ssize_t count = f.Read(buf, sizeof(buf));
 102         CPPUNIT_ASSERT(count > 0);
 103
 104         return true;
 105     }
 106
 107     bool ModifyFile()
 108     {
 109         CPPUNIT_ASSERT(m_file.FileExists());
 110
 111         wxFile file(m_file.GetFullPath(), wxFile::write_append);
 112         CPPUNIT_ASSERT(file.IsOpened());
 113
 114         CPPUNIT_ASSERT(file.Write("Words of Wisdom, Lloyd. Words of wisdom\n"));
 115         return file.Close();
 116     }
 117
 118     // helpers
 119     wxFileName RandomName(int length = 10)
 120     {
 121         return RandomName(m_base, length);
 122     }
 123
 124     // static helpers
 125     static const wxFileName& GetWatchDir()
 126     {
 127         static wxFileName dir;
 128
 129         if (dir.DirExists())
 130             return dir;
 131
 132         wxString tmp = wxStandardPaths::Get().GetTempDir();
 133         dir.AssignDir(tmp);
 134
 135         // XXX look for more unique name? there is no function to generate
 136         // unique filename, the file always get created...
 137         dir.AppendDir("fswatcher_test");
 138         CPPUNIT_ASSERT(!dir.DirExists());
 139         CPPUNIT_ASSERT(dir.Mkdir());
 140
 141         return dir;
 142     }
 143
 144     static void RemoveWatchDir()
 145     {
 146         wxFileName dir = GetWatchDir();
 147         CPPUNIT_ASSERT(dir.DirExists());
 148
 149         // just to be really sure we know what we remove
 150         CPPUNIT_ASSERT_EQUAL( "fswatcher_test", dir.GetDirs().Last() );
 151
 152         // FIXME-VC6: using non-static Rmdir() results in ICE
 153         CPPUNIT_ASSERT( wxFileName::Rmdir(dir.GetFullPath(), wxPATH_RMDIR_RECURSIVE) );
 154     }
 155
 156     static wxFileName RandomName(const wxFileName& base, int length = 10)
 157     {
 158         static int ALFA_CNT = 'z' - 'a';
 159
 160         wxString s;
 161         for (int i = 0 ; i < length; ++i)
 162         {
 163             char c = 'a' + (rand() % ALFA_CNT);
 164             s += c;
 165         }
 166
 167         return wxFileName(base.GetFullPath(), s);
 168     }
 169
 170 public:
 171     wxFileName m_base;     // base dir for doing operations
 172     wxFileName m_file;     // current file name
 173     wxFileName m_old;      // previous file name
 174     wxFileName m_new;      // name after renaming
 175
 176 protected:
 177     static EventGenerator* ms_instance;
 178 };
 179
 180 EventGenerator* EventGenerator::ms_instance = 0;
 181
 182
 183 // custom event handler
 184 class EventHandler : public wxEvtHandler
 185 {
 186 public:
 187     enum { WAIT_DURATION = 3 };
 188
 189     EventHandler() :
 190         eg(EventGenerator::Get()), m_loop(0), m_count(0), m_watcher(0)
 191     {
 192         m_loop = new wxEventLoop();
 193         Connect(wxEVT_IDLE, wxIdleEventHandler(EventHandler::OnIdle));
 194         Connect(wxEVT_FSWATCHER, wxFileSystemWatcherEventHandler(
 195                                             EventHandler::OnFileSystemEvent));
 196     }
 197
 198     virtual ~EventHandler()
 199     {
 200         delete m_watcher;
 201         if (m_loop)
 202         {
 203             if (m_loop->IsRunning())
 204                 m_loop->Exit();
 205             delete m_loop;
 206         }
 207     }
 208
 209     void Exit()
 210     {
 211         m_loop->Exit();
 212     }
 213
 214     // sends idle event, so we get called in a moment
 215     void SendIdle()
 216     {
 217         wxIdleEvent* e = new wxIdleEvent();
 218         QueueEvent(e);
 219     }
 220
 221     void Run()
 222     {
 223         SendIdle();
 224         m_loop->Run();
 225     }
 226
 227     void OnIdle(wxIdleEvent& /*evt*/)
 228     {
 229         bool more = Action();
 230         m_count++;
 231
 232         if (more)
 233         {
 234             SendIdle();
 235         }
 236     }
 237
 238     // returns whether we should produce more idle events
 239     virtual bool Action()
 240     {
 241         switch (m_count)
 242         {
 243         case 0:
 244             CPPUNIT_ASSERT(Init());
 245             break;
 246         case 1:
 247             GenerateEvent();
 248             break;
 249         case 2:
 250             // actual test
 251             CPPUNIT_ASSERT(CheckResult());
 252             Exit();
 253             break;
 254
 255         // TODO a mechanism that will break the loop in case we
 256         // don't receive a file system event
 257         // this below doesn't quite work, so all tests must pass :-)
 258 #if 0
 259         case 2:
 260             m_loop.Yield();
 261             m_loop.WakeUp();
 262             CPPUNIT_ASSERT(KeepWaiting());
 263             m_loop.Yield();
 264             break;
 265         case 3:
 266             break;
 267         case 4:
 268             CPPUNIT_ASSERT(AfterWait());
 269             break;
 270 #endif
 271         } // switch (m_count)
 272
 273         return m_count <= 0;
 274     }
 275
 276     virtual bool Init()
 277     {
 278         // test we're good to go
 279         CPPUNIT_ASSERT(wxEventLoopBase::GetActive());
 280
 281         // XXX only now can we construct Watcher, because we need
 282         // active loop here
 283         m_watcher = new wxFileSystemWatcher();
 284         m_watcher->SetOwner(this);
 285
 286         // add dir to be watched
 287         wxFileName dir = EventGenerator::GetWatchDir();
 288         CPPUNIT_ASSERT(m_watcher->Add(dir, wxFSW_EVENT_ALL));
 289
 290         return true;
 291     }
 292
 293     virtual bool KeepWaiting()
 294     {
 295         // did we receive event already?
 296         if (!tested)
 297         {
 298             // well, lets wait a bit more
 299             wxSleep(WAIT_DURATION);
 300         }
 301
 302         return true;
 303     }
 304
 305     virtual bool AfterWait()
 306     {
 307         // fail if still no events
 308         WX_ASSERT_MESSAGE
 309         (
 310              ("No events during %d seconds!", static_cast<int>(WAIT_DURATION)),
 311              tested
 312         );
 313
 314         return true;
 315     }
 316
 317     virtual void OnFileSystemEvent(wxFileSystemWatcherEvent& evt)
 318     {
 319         wxLogDebug("--- %s ---", evt.ToString());
 320         m_lastEvent = wxDynamicCast(evt.Clone(), wxFileSystemWatcherEvent);
 321         m_events.Add(m_lastEvent);
 322
 323         // test finished
 324         SendIdle();
 325         tested = true;
 326     }
 327
 328     virtual bool CheckResult()
 329     {
 330         CPPUNIT_ASSERT_MESSAGE( "No events received", !m_events.empty() );
 331
 332         WX_ASSERT_EQUAL_MESSAGE
 333         (
 334             (
 335                 "Extra event received, last has type=%x, path=\"%s\"",
 336                 m_events.back()->GetChangeType(),
 337                 m_events.back()->GetPath().GetFullPath()
 338             ),
 339             1, m_events.size()
 340         );
 341
 342         const wxFileSystemWatcherEvent * const e = m_events.front();
 343
 344         // this is our "reference event"
 345         const wxFileSystemWatcherEvent expected = ExpectedEvent();
 346
 347         CPPUNIT_ASSERT_EQUAL( expected.GetChangeType(), e->GetChangeType() );
 348
 349         CPPUNIT_ASSERT_EQUAL((int)wxEVT_FSWATCHER, e->GetEventType());
 350
 351         // XXX this needs change
 352         CPPUNIT_ASSERT_EQUAL(wxEVT_CATEGORY_UNKNOWN, e->GetEventCategory());
 353
 354         CPPUNIT_ASSERT_EQUAL(expected.GetPath(), e->GetPath());
 355         CPPUNIT_ASSERT_EQUAL(expected.GetNewPath(), e->GetNewPath());
 356
 357         return true;
 358     }
 359
 360     virtual void GenerateEvent() = 0;
 361
 362     virtual wxFileSystemWatcherEvent ExpectedEvent() = 0;
 363
 364
 365 protected:
 366     EventGenerator& eg;
 367     wxEventLoopBase* m_loop;    // loop reference
 368     int m_count;                // idle events count
 369
 370     wxFileSystemWatcher* m_watcher;
 371     bool tested;  // indicates, whether we have already passed the test
 372
 373     #include "wx/arrimpl.cpp"
 374     WX_DEFINE_ARRAY_PTR(wxFileSystemWatcherEvent*, wxArrayEvent);
 375     wxArrayEvent m_events;
 376     wxFileSystemWatcherEvent* m_lastEvent;
 377 };
 378
 379
 380 // ----------------------------------------------------------------------------
 381 // test class
 382 // ----------------------------------------------------------------------------
 383
 384 class FileSystemWatcherTestCase : public CppUnit::TestCase
 385 {
 386 public:
 387     FileSystemWatcherTestCase() { }
 388
 389     virtual void setUp();
 390     virtual void tearDown();
 391
 392 protected:
 393     wxEventLoopBase* m_loop;
 394
 395 private:
 396     CPPUNIT_TEST_SUITE( FileSystemWatcherTestCase );
 397         CPPUNIT_TEST( TestEventCreate );
 398         CPPUNIT_TEST( TestEventDelete );
 399
 400         // kqueue-based implementation doesn't collapse create/delete pairs in
 401         // renames and doesn't detect neither modifications nor access to the
 402         // files reliably currently so disable these tests
 403         //
 404         // FIXME: fix the code and reenable them
 405 #ifndef wxHAS_KQUEUE
 406         CPPUNIT_TEST( TestEventRename );
 407         CPPUNIT_TEST( TestEventModify );
 408
 409         // MSW implementation doesn't detect file access events currently
 410 #ifndef __WXMSW__
 411         CPPUNIT_TEST( TestEventAccess );
 412 #endif // __WXMSW__
 413 #endif // !wxHAS_KQUEUE
 414     CPPUNIT_TEST_SUITE_END();
 415
 416     void TestEventCreate();
 417     void TestEventDelete();
 418     void TestEventRename();
 419     void TestEventModify();
 420     void TestEventAccess();
 421
 422     DECLARE_NO_COPY_CLASS(FileSystemWatcherTestCase)
 423 };
 424
 425 // register in the unnamed registry so that these tests are run by default
 426 CPPUNIT_TEST_SUITE_REGISTRATION( FileSystemWatcherTestCase );
 427
 428 // also include in it's own registry so that these tests can be run alone
 429 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( FileSystemWatcherTestCase,
 430                                         "FileSystemWatcherTestCase" );
 431
 432 void FileSystemWatcherTestCase::setUp()
 433 {
 434     wxLog::AddTraceMask(wxTRACE_FSWATCHER);
 435     EventGenerator::Get().GetWatchDir();
 436 }
 437
 438 void FileSystemWatcherTestCase::tearDown()
 439 {
 440     EventGenerator::Get().RemoveWatchDir();
 441 }
 442
 443 // ----------------------------------------------------------------------------
 444 // TestEventCreate
 445 // ----------------------------------------------------------------------------
 446 void FileSystemWatcherTestCase::TestEventCreate()
 447 {
 448     wxLogDebug("TestEventCreate()");
 449
 450     class EventTester : public EventHandler
 451     {
 452     public:
 453         virtual void GenerateEvent()
 454         {
 455             CPPUNIT_ASSERT(eg.CreateFile());
 456         }
 457
 458         virtual wxFileSystemWatcherEvent ExpectedEvent()
 459         {
 460             wxFileSystemWatcherEvent event(wxFSW_EVENT_CREATE);
 461             event.SetPath(eg.m_file);
 462             event.SetNewPath(eg.m_file);
 463             return event;
 464         }
 465     };
 466
 467     EventTester tester;
 468
 469     wxLogTrace(wxTRACE_FSWATCHER, "TestEventCreate tester created()");
 470
 471     tester.Run();
 472 }
 473
 474 // ----------------------------------------------------------------------------
 475 // TestEventDelete
 476 // ----------------------------------------------------------------------------
 477 void FileSystemWatcherTestCase::TestEventDelete()
 478 {
 479     wxLogDebug("TestEventDelete()");
 480
 481     class EventTester : public EventHandler
 482     {
 483     public:
 484         virtual void GenerateEvent()
 485         {
 486             CPPUNIT_ASSERT(eg.DeleteFile());
 487         }
 488
 489         virtual wxFileSystemWatcherEvent ExpectedEvent()
 490         {
 491             wxFileSystemWatcherEvent event(wxFSW_EVENT_DELETE);
 492             event.SetPath(eg.m_old);
 493
 494             // CHECK maybe new path here could be NULL or sth?
 495             event.SetNewPath(eg.m_old);
 496             return event;
 497         }
 498     };
 499
 500     // we need to create a file now, so we can delete it
 501     EventGenerator::Get().CreateFile();
 502
 503     EventTester tester;
 504     tester.Run();
 505 }
 506
 507 // ----------------------------------------------------------------------------
 508 // TestEventRename
 509 // ----------------------------------------------------------------------------
 510 void FileSystemWatcherTestCase::TestEventRename()
 511 {
 512     wxLogDebug("TestEventRename()");
 513
 514     class EventTester : public EventHandler
 515     {
 516     public:
 517         virtual void GenerateEvent()
 518         {
 519             CPPUNIT_ASSERT(eg.RenameFile());
 520         }
 521
 522         virtual wxFileSystemWatcherEvent ExpectedEvent()
 523         {
 524             wxFileSystemWatcherEvent event(wxFSW_EVENT_RENAME);
 525             event.SetPath(eg.m_old);
 526             event.SetNewPath(eg.m_file);
 527             return event;
 528         }
 529     };
 530
 531     // need a file to rename later
 532     EventGenerator::Get().CreateFile();
 533
 534     EventTester tester;
 535     tester.Run();
 536 }
 537
 538 // ----------------------------------------------------------------------------
 539 // TestEventModify
 540 // ----------------------------------------------------------------------------
 541 void FileSystemWatcherTestCase::TestEventModify()
 542 {
 543     wxLogDebug("TestEventModify()");
 544
 545     class EventTester : public EventHandler
 546     {
 547     public:
 548         virtual void GenerateEvent()
 549         {
 550             CPPUNIT_ASSERT(eg.ModifyFile());
 551         }
 552
 553         virtual wxFileSystemWatcherEvent ExpectedEvent()
 554         {
 555             wxFileSystemWatcherEvent event(wxFSW_EVENT_MODIFY);
 556             event.SetPath(eg.m_file);
 557             event.SetNewPath(eg.m_file);
 558             return event;
 559         }
 560     };
 561
 562     // we need to create a file to modify
 563     EventGenerator::Get().CreateFile();
 564
 565     EventTester tester;
 566     tester.Run();
 567 }
 568
 569 // ----------------------------------------------------------------------------
 570 // TestEventAccess
 571 // ----------------------------------------------------------------------------
 572 void FileSystemWatcherTestCase::TestEventAccess()
 573 {
 574     wxLogDebug("TestEventAccess()");
 575
 576     class EventTester : public EventHandler
 577     {
 578     public:
 579         virtual void GenerateEvent()
 580         {
 581             CPPUNIT_ASSERT(eg.ReadFile());
 582         }
 583
 584         virtual wxFileSystemWatcherEvent ExpectedEvent()
 585         {
 586             wxFileSystemWatcherEvent event(wxFSW_EVENT_ACCESS);
 587             event.SetPath(eg.m_file);
 588             event.SetNewPath(eg.m_file);
 589             return event;
 590         }
 591     };
 592
 593     // we need to create a file to read from it and write sth to it
 594     EventGenerator::Get().CreateFile();
 595     EventGenerator::Get().ModifyFile();
 596
 597     EventTester tester;
 598     tester.Run();
 599 }