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gaia/apps/calendar/test/unit/time_observer_test.js

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+define(function(require) {
+'use strict';
+
+var timeObserver = require('time_observer');
+
+suite('time_observer', function() {
+  var subject;
+  var MINUTE = 60 * 1000;
+  var DAY = 24 * 60 * MINUTE;
+
+  suiteSetup(function() {
+    subject = timeObserver;
+  });
+
+  suite('minuteChange', function() {
+    var clock;
+
+    setup(function() {
+      clock = sinon.useFakeTimers((new Date(2015, 3, 15)).getTime());
+    });
+
+    teardown(function() {
+      subject._stop();
+      subject.removeAllListeners();
+      clock.restore();
+    });
+
+    test('#add', function() {
+      var prev = (new Date()).getMinutes();
+      var count = 0;
+      subject.on('minute', function() {
+        count += 1;
+        var cur = (new Date()).getMinutes();
+        assert.notEqual(prev, cur);
+        prev = cur;
+      });
+      // need to make sure that callback is only triggered when minute changes
+      clock.tick(MINUTE);
+      clock.tick(1000);
+      clock.tick(MINUTE);
+      clock.tick(20 * 1000);
+      clock.tick(MINUTE);
+      assert.equal(count, 3);
+    });
+
+    test('#once', function() {
+      var count = 0;
+      subject.once('minute', function() {
+        count += 1;
+      });
+      clock.tick(MINUTE);
+      clock.tick(MINUTE);
+      clock.tick(MINUTE);
+      assert.equal(count, 1);
+    });
+
+    test('#remove', function(done) {
+      var cb = function() {
+        assert.fail('should not be called');
+      };
+      subject.on('minute', cb);
+      subject.off('minute', cb);
+      clock.tick(MINUTE);
+      done();
+    });
+  });
+
+  suite('dayChange', function() {
+    var clock;
+
+    setup(function() {
+      clock = sinon.useFakeTimers((new Date(2015, 3, 15)).getTime());
+    });
+
+    teardown(function() {
+      subject._stop();
+      subject.removeAllListeners();
+      clock.restore();
+    });
+
+    test('#add', function() {
+      var prev = (new Date()).getDate();
+      var count = 0;
+      subject.on('day', function() {
+        count += 1;
+        var cur = (new Date()).getDate();
+        assert.notEqual(prev, cur);
+        prev = cur;
+      });
+      // need to make sure that callback is only triggered when day changes
+      clock.tick(MINUTE);
+      clock.tick(DAY);
+      clock.tick(MINUTE);
+      clock.tick(MINUTE);
+      clock.tick(DAY);
+      clock.tick(DAY);
+      assert.equal(count, 3);
+    });
+
+    test('#once', function() {
+      var count = 0;
+      subject.once('day', function() {
+        count += 1;
+      });
+      clock.tick(DAY);
+      clock.tick(DAY);
+      clock.tick(DAY);
+      assert.equal(count, 1);
+    });
+
+    test('#remove', function(done) {
+      var cb = function() {
+        assert.fail('should not be called');
+      };
+      subject.on('day', cb);
+      subject.off('day', cb);
+      clock.tick(DAY);
+      done();
+    });
+  });
+
+  suite('_toggleStatusOnVisibilityChange', function() {
+    var mock;
+    setup(function() {
+      mock = sinon.mock(subject);
+    });
+    teardown(function() {
+      mock.restore();
+    });
+
+    test('hidden', function() {
+      mock.expects('_stop').once();
+      mock.expects('_start').never();
+      mock.expects('_exec').never();
+      subject._toggleStatusOnVisibilityChange(true);
+      mock.verify();
+    });
+
+    test('visible', function() {
+      mock.expects('_stop').never();
+      mock.expects('_start').once();
+      mock.expects('_exec').once();
+      subject._toggleStatusOnVisibilityChange(false);
+      mock.verify();
+    });
+  });
+
+});
+});