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<!--
Copyright 2012 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<!--
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.labs.observe.ObservationSet</title>
<script src="../../base.js"></script>
<script>
  goog.require('goog.dispose');
  goog.require('goog.labs.observe.Observer');
  goog.require('goog.labs.observe.ObservationSet');
  goog.require('goog.labs.observe.SimpleObservable');
  goog.require('goog.testing.jsunit');
  goog.require('goog.testing.recordFunction');
</script>
</head>
<body>
<script>
var observable;
var observable2;
var observationSet;


function setUp() {
  observable = new goog.labs.observe.SimpleObservable();
  observable2 = new goog.labs.observe.SimpleObservable();
  observationSet = new goog.labs.observe.ObservationSet();
}


function tearDown() {
  goog.dispose(observable);
  goog.dispose(observable2);
}


function testObserveObservesCorrectly() {
  var observerFn = goog.testing.recordFunction();
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));

  observable.notify();
  assertEquals(1, observerFn.getCallCount());
}


function testObserveDoesNotRegisterDuplicateObserver() {
  var observerFn = goog.testing.recordFunction();
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));
  assertFalse(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));

  observable.notify();
  assertEquals(1, observerFn.getCallCount());
}


function testObserveWithMultipleObservers() {
  var observerFn = goog.testing.recordFunction();
  var observerFn2 = goog.testing.recordFunction();
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn2)));

  observable.notify();
  assertEquals(1, observerFn.getCallCount());
  assertEquals(1, observerFn2.getCallCount());
}


function testObserveWithFunction() {
  var observerFn = goog.testing.recordFunction();
  assertNotNull(observationSet.observeWithFunction(observable, observerFn));
  assertNull(observationSet.observeWithFunction(observable, observerFn));
  assertFalse(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));

  observable.notify();
  assertEquals(1, observerFn.getCallCount());
}


function testObserveWithFunctionAndScope() {
  var scope = {};

  var observerFn = goog.testing.recordFunction(function() {
    assertEquals(scope, this);
  });
  assertNotNull(observationSet.observeWithFunction(
      observable, observerFn, scope));
  assertNull(observationSet.observeWithFunction(
      observable, observerFn, scope));
  assertFalse(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn, scope)));

  observable.notify();
  assertEquals(1, observerFn.getCallCount());
}


function testObserveWithFunctionWithDefaultScope() {
  var scope = {};
  observationSet = new goog.labs.observe.ObservationSet(scope);

  var observerFn = goog.testing.recordFunction(function() {
    assertEquals(scope, this);
  });

  assertNotNull(observationSet.observeWithFunction(observable, observerFn));
  assertNull(observationSet.observeWithFunction(observable, observerFn));
  assertNull(observationSet.observeWithFunction(observable, observerFn, scope));
  assertFalse(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn, scope)));

  observable.notify();
  assertEquals(1, observerFn.getCallCount());

  // This should succeed since we use observe method, defaultScope is
  // not used in this case.
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));

  // This should succeed since the scope is different.
  var scope2 = {};
  assertNotNull(observationSet.observeWithFunction(
      observable, observerFn, scope2));
}


function testUnobserveUnobservesCorrectly() {
  var observerFn = goog.testing.recordFunction();
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));
  assertTrue(observationSet.unobserve(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));

  observable.notify();
  assertEquals(0, observerFn.getCallCount());
}


function testUnobserveDoesNotUnobserveObservationNotMadeByObservationSet() {
  var observerFn = goog.testing.recordFunction();

  // Observation via observable directly.
  observable.observe(goog.labs.observe.Observer.fromFunction(observerFn));

  assertFalse(observationSet.unobserve(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));
  observable.notify();
  assertEquals(1, observerFn.getCallCount());
  observerFn.reset();

  // Observation via another ObservationSet.
  var observationSet2 = new goog.labs.observe.ObservationSet();
  observationSet2.observe(
      observable2, goog.labs.observe.Observer.fromFunction(observerFn));

  assertFalse(observationSet.unobserve(
      observable2, goog.labs.observe.Observer.fromFunction(observerFn)));
  observable2.notify();
  assertEquals(1, observerFn.getCallCount());
  observerFn.reset();
}


function testUnobserveWithFunction() {
  var observerFn = goog.testing.recordFunction();
  observationSet.observeWithFunction(observable, observerFn);
  assertTrue(observationSet.unobserveWithFunction(observable, observerFn));
  assertNotNull(observationSet.observeWithFunction(observable, observerFn));
  assertTrue(observationSet.unobserve(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));

  observable.notify();
  assertEquals(0, observerFn.getCallCount());
}


function testUnobserveWithFunctionAndScope() {
  var scope = {};

  var observerFn = goog.testing.recordFunction();
  observationSet.observeWithFunction(
      observable, observerFn, scope);
  assertTrue(observationSet.unobserveWithFunction(
      observable, observerFn, scope));
  assertNotNull(observationSet.observeWithFunction(
      observable, observerFn, scope));
  assertTrue(observationSet.unobserve(
      observable, goog.labs.observe.Observer.fromFunction(observerFn, scope)));

  observable.notify();
  assertEquals(0, observerFn.getCallCount());
}


function testUnobserveWithFunctionWithDefaultScope() {
  var scope = {};
  observationSet = new goog.labs.observe.ObservationSet(scope);

  var observerFn = goog.testing.recordFunction();
  observationSet.observeWithFunction(observable, observerFn);
  assertTrue(observationSet.unobserveWithFunction(observable, observerFn));

  assertNotNull(observationSet.observeWithFunction(
      observable, observerFn, scope));
  assertTrue(observationSet.unobserveWithFunction(observable, observerFn));

  assertNotNull(observationSet.observeWithFunction(observable, observerFn));
  assertTrue(observationSet.unobserveWithFunction(
      observable, observerFn, scope));

  observable.notify();
  assertEquals(0, observerFn.getCallCount());
}


function testRemoveAllWithZeroObservation() {
  observationSet.removeAll();
}


function testRemoveAll() {
  var observerFn = goog.testing.recordFunction();
  var observerFn2 = goog.testing.recordFunction();
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn)));
  assertTrue(observationSet.observe(
      observable, goog.labs.observe.Observer.fromFunction(observerFn2)));
  assertTrue(observationSet.observe(
      observable2, goog.labs.observe.Observer.fromFunction(observerFn)));
  observationSet.removeAll();

  observable.notify();
  observable2.notify();

  assertEquals(0, observerFn.getCallCount());
  assertEquals(0, observerFn2.getCallCount());
}
</script>
</body>
</html>