public void Property_ReferencingScope_ActsAsStrongReference()
{
var(valueRef, scopeRef) = Part1();
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.False(valueRef.IsAlive);
Assert.False(scopeRef.IsAlive);
(WeakReference, WeakReference, object) Create()
{
var name = Guid.NewGuid().ToString("N");
var scope = new ConnectedPropertyScope();
var scopeRef = new WeakReference(scope);
var carrier = new object();
Func <int> value = scope.GetHashCode;
var valueRef = new WeakReference(value);
scope.GetConnectedProperty(carrier, name).Set(value);
return(valueRef, scopeRef, carrier);
}
(WeakReference, WeakReference) Part1()
{
var(valueRef, scopeRef, carrier) = Create();
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.True(valueRef.IsAlive);
Assert.True(scopeRef.IsAlive);
GC.KeepAlive(carrier);
return(valueRef, scopeRef);
}
}
public void Properties_CrossReferencingCarriersAcrossScopes_WhenOnePropertyRemainsAlive_AreNotCollected()
{
var(carrierRef1, valueRef1, carrierRef2, valueRef2, value1) = Create();
GC.Collect();
Assert.True(carrierRef1.IsAlive);
Assert.True(valueRef1.IsAlive);
Assert.True(carrierRef2.IsAlive);
Assert.True(valueRef2.IsAlive);
GC.KeepAlive(value1);
(WeakReference, WeakReference, WeakReference, WeakReference, Func <int>) Create()
{
var name = Guid.NewGuid().ToString("N");
var other = new ConnectedPropertyScope();
var carrier1 = new object();
var carrierRef1 = new WeakReference(carrier1);
var carrier2 = new object();
var carrierRef2 = new WeakReference(carrier1);
Func <int> value1 = carrier2.GetHashCode;
var valueRef1 = new WeakReference(value1);
Func <int> value2 = carrier1.GetHashCode;
var valueRef2 = new WeakReference(value2);
ConnectedProperty.GetConnectedProperty(carrier1, name).Set(value1);
other.GetConnectedProperty(carrier2, name).Set(value2);
return(carrierRef1, valueRef1, carrierRef2, valueRef2, value1);
}
}
public void Properties_WithSameNameButDifferentScopes_HaveIndependentValues()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
var other = new ConnectedPropertyScope();
ConnectedProperty.GetConnectedProperty(carrier, name).Set(17);
other.GetConnectedProperty(carrier, name).Set(13);
Assert.Equal(17, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
Assert.Equal(13, other.GetConnectedProperty(carrier, name).Get());
}
public void Property_WhenScopeIsCollected_IsCollected()
{
var name = Guid.NewGuid().ToString("N");
var scope = new ConnectedPropertyScope();
var carrier = new object();
var value = new object();
var valueRef = new WeakReference(value);
scope.GetConnectedProperty(carrier, name).Set(value);
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
Assert.False(valueRef.IsAlive);
GC.KeepAlive(carrier);
}
public void Properties_CrossReferencingCarriersAcrossScopes_WhenCarriersAreCollected_AreCollected()
{
var name = Guid.NewGuid().ToString("N");
var other = new ConnectedPropertyScope();
var carrier1 = new object();
var carrierRef1 = new WeakReference(carrier1);
var carrier2 = new object();
var carrierRef2 = new WeakReference(carrier1);
Func <int> value1 = carrier2.GetHashCode;
var valueRef1 = new WeakReference(value1);
Func <int> value2 = carrier1.GetHashCode;
var valueRef2 = new WeakReference(value2);
ConnectedProperty.GetConnectedProperty(carrier1, name).Set(value1);
other.GetConnectedProperty(carrier2, name).Set(value2);
GC.Collect();
Assert.False(carrierRef1.IsAlive);
Assert.False(valueRef1.IsAlive);
Assert.False(carrierRef2.IsAlive);
Assert.False(valueRef2.IsAlive);
}
