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_CrossReferencingCarriers_WhenCarriersAreCollected_AreCollected()
{
var(carrierRef1, valueRef1, carrierRef2, valueRef2) = Create();
GC.Collect();
Assert.False(carrierRef1.IsAlive);
Assert.False(valueRef1.IsAlive);
Assert.False(carrierRef2.IsAlive);
Assert.False(valueRef2.IsAlive);
(WeakReference, WeakReference, WeakReference, WeakReference) Create()
{
var name = Guid.NewGuid().ToString("N");
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);
ConnectedProperty.GetConnectedProperty(carrier2, name).Set(value2);
return(carrierRef1, valueRef1, carrierRef2, valueRef2);
}
}
public void TryDisconnect_WhenDisconnected_ReturnsFalse()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
Assert.False(ConnectedProperty.GetConnectedProperty(carrier, name).TryDisconnect());
}
public void TryConnect_WhenDisconnected_ReturnsTrueAndSetsValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
Assert.True(ConnectedProperty.GetConnectedProperty(carrier, name).TryConnect(17));
Assert.Equal(17, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void Disconnect_WhenDisconnected_Throws()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
var property = ConnectedProperty.GetConnectedProperty(carrier, name);
Assert.Throws <InvalidOperationException>(() => property.Disconnect());
}
public void SimpleUsage()
{
var obj = new object();
ConnectedProperty.Set(obj, "Name", "Bob");
Assert.Equal("Bob", ReadName(obj));
}
public void Connect_WhenDisconnected_SetsValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Connect(13);
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void Set_WhenConnected_OverwritesExistingValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(17);
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void TryUpdate_WhenDisconnected_ReturnsFalseAndDoesNotSetValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
var result = ConnectedProperty.GetConnectedProperty(carrier, name).TryUpdate(19, 17);
Assert.False(result);
Assert.False(ConnectedProperty.GetConnectedProperty(carrier, name).TryDisconnect());
}
public void CreateOrUpdate_WhenDisconnected_SetsAndReturnsValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
var result = ConnectedProperty.GetConnectedProperty(carrier, name).CreateOrUpdate(() => 13, x => x + 2);
Assert.Equal(13, result);
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void Disconnect_WhenConnected_Disconnects()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
ConnectedProperty.GetConnectedProperty(carrier, name).Disconnect();
Assert.False(ConnectedProperty.GetConnectedProperty(carrier, name).TryDisconnect());
}
public void TryConnect_WhenConnected_ReturnsFalseAndDoesNotSetValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
Assert.False(ConnectedProperty.GetConnectedProperty(carrier, name).TryConnect(17));
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void Properties_WithDifferentNames_HaveIndependentValues()
{
var carrier = new object();
var name1 = Guid.NewGuid().ToString("N");
var name2 = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name1).Set(17);
ConnectedProperty.GetConnectedProperty(carrier, name2).Set(13);
Assert.Equal(17, ConnectedProperty.GetConnectedProperty(carrier, name1).Get());
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name2).Get());
}
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 GetOrConnect_WhenConnected_ReturnsExistingValueAndDoesNotModifyValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(17);
var result = ConnectedProperty.GetConnectedProperty(carrier, name).GetOrConnect(13);
Assert.Equal(17, result);
Assert.Equal(17, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void GetOrCreate_WhenConnected_GetsValueAndDoesNotSetValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
var result = ConnectedProperty.GetConnectedProperty(carrier, name).GetOrCreate(() => 17);
Assert.Equal(13, result);
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void TryUpdate_WhenConnectedWithMatchingValue_ReturnsTrueAndSetsValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
var result = ConnectedProperty.GetConnectedProperty(carrier, name).TryUpdate(19, 13);
Assert.True(result);
Assert.Equal(19, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void TryUpdate_WhenConnectedWithNonmatchingValue_ReturnsFalseAndDoesNotSetValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
var result = ConnectedProperty.GetConnectedProperty(carrier, name).TryUpdate(19, 17);
Assert.False(result);
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void ConnectOrUpdate_WhenConnected_UpdatesAndReturnsValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
var result = ConnectedProperty.GetConnectedProperty(carrier, name).ConnectOrUpdate(13, x => x + 2);
Assert.Equal(15, result);
Assert.Equal(15, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
private static dynamic TryGetConnectedProperty(object obj, string name)
{
try
{
return(ConnectedProperty.Get(obj, name));
}
catch (InvalidOperationException)
{
return(null);
}
}
public void Connect_WhenConnected_ThrowsAndDoesNotModifyValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Connect(13);
var property = ConnectedProperty.GetConnectedProperty(carrier, name);
Assert.Throws <InvalidOperationException>(() => property.Connect(17));
Assert.Equal(13, ConnectedProperty.GetConnectedProperty(carrier, name).Get());
}
public void TryGet_WhenConnected_ReturnsTrueAndValue()
{
var carrier = new object();
var name = Guid.NewGuid().ToString("N");
ConnectedProperty.GetConnectedProperty(carrier, name).Set(13);
dynamic value;
Assert.True(ConnectedProperty.GetConnectedProperty(carrier, name).TryGet(out value));
Assert.Equal(13, value);
}
public void Property_WhenCarrierIsAlive_IsNotCollected()
{
// A "dictionary mapping" with weak value references will not pass this test.
var name = Guid.NewGuid().ToString("N");
var carrier = new object();
var value = new object();
var valueRef = new WeakReference(value);
ConnectedProperty.GetConnectedProperty(carrier, name).Set(value);
GC.Collect();
Assert.True(valueRef.IsAlive);
GC.KeepAlive(carrier);
}
public void Property_WhenCarrierIsCollected_IsCollected()
{
var name = Guid.NewGuid().ToString("N");
var carrier = new object();
var carrierRef = new WeakReference(carrier);
var value = new object();
var valueRef = new WeakReference(value);
ConnectedProperty.GetConnectedProperty(carrier, name).Set(value);
GC.Collect();
Assert.False(carrierRef.IsAlive);
Assert.False(valueRef.IsAlive);
}
/// <summary>
/// Attempts to get the logging scopes for an exception. Returns <c>null</c> if there are no logging scopes for this exception.
/// </summary>
public static ImmutableStack <ILoggingScope>?TryGetLoggingScopes(this Exception exception)
{
var prop = ConnectedProperty.GetConnectedProperty(exception, LoggingScopesName, bypassValidation: true);
if (prop == null)
{
return(null);
}
if (!prop.TryGet(out var value))
{
return(null);
}
return(value as ImmutableStack <ILoggingScope>);
}
public void Property_ReferencingCarrier_WhenCarrierIsCollected_IsCollected()
{
// A "dictionary mapping" with strong value references will not pass this test.
var name = Guid.NewGuid().ToString("N");
var carrier = new object();
var carrierRef = new WeakReference(carrier);
Func <int> value = carrier.GetHashCode;
var valueRef = new WeakReference(value);
ConnectedProperty.GetConnectedProperty(carrier, name).Set(value);
GC.Collect();
Assert.False(carrierRef.IsAlive);
Assert.False(valueRef.IsAlive);
}
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);
}
set => SetValue(ConnectedProperty, value);
/// <summary>
/// Sets the logging scopes for an exception.
/// </summary>
public static void SetLoggingScopes(this Exception exception, ImmutableStack <ILoggingScope> loggingScopes)
{
ConnectedProperty.GetConnectedProperty(exception, LoggingScopesName, bypassValidation: true).Set(loggingScopes);
}
private static string ReadName(object obj) => ConnectedProperty.Get(obj, "Name");
