libs/pbd/test/signals_test.cc

   1 #include "signals_test.h"
   2 #include "pbd/signals.h"
   3
   4 using namespace std;
   5
   6 CPPUNIT_TEST_SUITE_REGISTRATION (SignalsTest);
   7
   8 class Emitter {
   9 public:
  10         void emit () {
  11                 Fred ();
  12         }
  13
  14         PBD::Signal0<void> Fred;
  15 };
  16
  17 static int N = 0;
  18
  19 void
  20 receiver ()
  21 {
  22         ++N;
  23 }
  24
  25 void
  26 SignalsTest::testEmission ()
  27 {
  28         Emitter* e = new Emitter;
  29         PBD::ScopedConnection c;
  30         e->Fred.connect_same_thread (c, boost::bind (&receiver));
  31
  32         N = 0;
  33         e->emit ();
  34         e->emit ();
  35         CPPUNIT_ASSERT_EQUAL (2, N);
  36
  37         e->Fred.connect_same_thread (c, boost::bind (&receiver));
  38         N = 0;
  39         e->emit ();
  40         CPPUNIT_ASSERT_EQUAL (2, N);
  41 }
  42
  43 void
  44 SignalsTest::testDestruction ()
  45 {
  46         Emitter* e = new Emitter;
  47         PBD::ScopedConnection c;
  48         e->Fred.connect_same_thread (c, boost::bind (&receiver));
  49         e->emit ();
  50         delete e;
  51         c.disconnect ();
  52
  53         CPPUNIT_ASSERT (true);
  54 }
  55
  56 class Receiver : public PBD::ScopedConnectionList
  57 {
  58 public:
  59         Receiver (Emitter* e) {
  60                 e->Fred.connect_same_thread (*this, boost::bind (&Receiver::receiver, this));
  61         }
  62
  63         void receiver () {
  64                 cout << "Receiver::receiver\n";
  65                 ++N;
  66         }
  67 };
  68
  69 void
  70 SignalsTest::testScopedConnectionList ()
  71 {
  72         Emitter* e = new Emitter;
  73         Receiver* r = new Receiver (e);
  74
  75         N = 0;
  76         e->emit ();
  77         delete r;
  78         e->emit ();
  79
  80         CPPUNIT_ASSERT_EQUAL (1, N);
  81 }