public void RegionDoesNotGetAddedTwiceWhenUpdatingRegions()
{
var regionManager = new MockRegionManager();
var control = new MockFrameworkElement();
var regionScopeControl = new ContentControl();
var accessor = new MockRegionManagerAccessor
{
GetRegionManager = d => d == regionScopeControl ? regionManager : null
};
var behavior = new RegionManagerRegistrationBehavior()
{
RegionManagerAccessor = accessor,
Region = new MockPresentationRegion()
{
Name = "myRegionName"
},
HostControl = control
};
behavior.Attach();
Assert.IsFalse(regionManager.MockRegionCollection.AddCalled);
regionScopeControl.Content = control;
accessor.UpdateRegions();
Assert.IsTrue(regionManager.MockRegionCollection.AddCalled);
regionManager.MockRegionCollection.AddCalled = false;
accessor.UpdateRegions();
Assert.IsFalse(regionManager.MockRegionCollection.AddCalled);
}
public void BehaviorDoesNotPreventRegionManagerFromBeingGarbageCollected()
{
var control = new MockFrameworkElement();
var regionManager = new MockRegionManager();
var regionManagerWeakReference = new WeakReference(regionManager);
var accessor = new MockRegionManagerAccessor
{
GetRegionName = d => "myRegionName",
GetRegionManager = d => regionManager
};
var behavior = new RegionManagerRegistrationBehavior()
{
RegionManagerAccessor = accessor,
Region = new MockPresentationRegion(),
HostControl = control
};
behavior.Attach();
Assert.IsTrue(regionManagerWeakReference.IsAlive);
GC.KeepAlive(regionManager);
regionManager = null;
GC.Collect();
Assert.IsFalse(regionManagerWeakReference.IsAlive);
}
public void CanAttachBeforeSettingName()
{
var control = new ItemsControl();
var regionManager = new MockRegionManager();
var accessor = new MockRegionManagerAccessor
{
GetRegionManager = d => regionManager
};
var region = new MockPresentationRegion()
{
Name = null
};
var behavior = new RegionManagerRegistrationBehavior()
{
RegionManagerAccessor = accessor,
Region = region,
HostControl = control
};
behavior.Attach();
Assert.IsFalse(regionManager.MockRegionCollection.AddCalled);
region.Name = "myRegionName";
Assert.IsTrue(regionManager.MockRegionCollection.AddCalled);
Assert.AreSame(region, regionManager.MockRegionCollection.AddArgument);
}
public void RegionGetsRemovedFromRegionManagerWhenRemovedFromScope()
{
var regionManager = new MockRegionManager();
var control = new MockFrameworkElement();
var regionScopeControl = new ContentControl();
var accessor = new MockRegionManagerAccessor
{
GetRegionManager = d => d == regionScopeControl ? regionManager : null
};
var region = new MockPresentationRegion()
{
Name = "myRegionName"
};
var behavior = new RegionManagerRegistrationBehavior()
{
RegionManagerAccessor = accessor,
Region = region,
HostControl = control
};
behavior.Attach();
regionScopeControl.Content = control;
accessor.UpdateRegions();
Assert.IsTrue(regionManager.MockRegionCollection.AddCalled);
Assert.AreSame(region, regionManager.MockRegionCollection.AddArgument);
regionScopeControl.Content = null;
accessor.UpdateRegions();
Assert.IsTrue(regionManager.MockRegionCollection.RemoveCalled);
}
public void HostControlSetAfterAttachThrows()
{
var behavior = new RegionManagerRegistrationBehavior();
var hostControl1 = new MockDependencyObject();
var hostControl2 = new MockDependencyObject();
behavior.HostControl = hostControl1;
behavior.Attach();
behavior.HostControl = hostControl2;
}
public void HostControlSetAfterAttachThrows()
{
var ex = Assert.Throws <InvalidOperationException>(() =>
{
var behavior = new RegionManagerRegistrationBehavior();
var hostControl1 = new MockDependencyObject();
var hostControl2 = new MockDependencyObject();
behavior.HostControl = hostControl1;
behavior.Attach();
behavior.HostControl = hostControl2;
});
}
public void DoesNotFailIfRegionManagerIsNotSet()
{
var control = new ItemsControl();
var accessor = new MockRegionManagerAccessor();
var behavior = new RegionManagerRegistrationBehavior()
{
RegionManagerAccessor = accessor,
Region = new MockPresentationRegion()
{
Name = "myRegionWithoutManager"
},
HostControl = control
};
behavior.Attach();
}
public void ShouldRegisterRegionIfRegionManagerIsSet()
{
var control = new ItemsControl();
var regionManager = new MockRegionManager();
var accessor = new MockRegionManagerAccessor
{
GetRegionManager = d => regionManager
};
var region = new MockPresentationRegion()
{
Name = "myRegionName"
};
var behavior = new RegionManagerRegistrationBehavior()
{
RegionManagerAccessor = accessor,
Region = region,
HostControl = control
};
behavior.Attach();
Assert.IsTrue(regionManager.MockRegionCollection.AddCalled);
Assert.AreSame(region, regionManager.MockRegionCollection.AddArgument);
}