private static DigitalSignal Connect(DigitalSignalProvider provider, DigitalSignalConsumer consumer)
{
if (consumer.IsConnected && provider.IsConnected)
{
if (consumer.DigitalSignal != provider.DigitalSignal)
{
throw new InvalidOperationException("Both Consumer and Provider are already connected to different signals.");
}
return(consumer.DigitalSignal);
}
DigitalSignal signal = null;
if (consumer.IsConnected)
{
signal = consumer.DigitalSignal;
provider.ConnectTo(signal);
}
else if (provider.IsConnected)
{
signal = provider.DigitalSignal;
consumer.ConnectTo(signal);
}
return(signal);
}
public void Connected_Level_IsFloating()
{
var uut = new DigitalSignalProvider();
uut.ConnectTo(new DigitalSignal());
uut.Level.Should().Be(DigitalLevel.Floating);
}
public void Connected_WithName_BuildName()
{
var name = "Test";
var uut = new DigitalSignalProvider();
uut.ConnectTo(new DigitalSignal(name));
uut.Name.Should().StartWith(name);
}
public void MultipleProviders_OneWrites_NoConflicts()
{
var provider1 = new DigitalSignalProvider();
var provider2 = new DigitalSignalProvider();
var signal = new DigitalSignal();
provider1.ConnectTo(signal);
provider2.ConnectTo(signal);
provider1.Write(DigitalLevel.High);
}
public void Connected_WriteHigh_LevelIsHigh()
{
var uut = new DigitalSignalProvider();
var signal = new DigitalSignal();
uut.ConnectTo(signal);
uut.Write(DigitalLevel.High);
uut.Level.Should().Be(DigitalLevel.High);
signal.Level.Should().Be(DigitalLevel.High);
}
public void Connect_WriteProvider_ConsumerSeesChanges()
{
var provider = new DigitalSignalProvider();
var consumer = new DigitalSignalConsumer();
var signal = new DigitalSignal();
provider.ConnectTo(signal);
consumer.ConnectTo(signal);
provider.Write(DigitalLevel.High);
consumer.Level.Should().Be(DigitalLevel.High);
}
public void Connect_WriteProvider_EventTriggered()
{
var provider = new DigitalSignalProvider();
var consumer = new DigitalSignalConsumer();
var signal = new DigitalSignal();
provider.ConnectTo(signal);
consumer.ConnectTo(signal);
consumer.MonitorEvents();
provider.Write(DigitalLevel.High);
consumer.ShouldRaise("OnChanged");
}
public void Connected_WriteHigh_TriggersEvent()
{
var uut = new DigitalSignalProvider();
var signal = new DigitalSignal();
uut.ConnectTo(signal);
signal.MonitorEvents();
uut.Write(DigitalLevel.High);
signal.ShouldRaise("OnChanged");
uut.Level.Should().Be(DigitalLevel.High);
signal.Level.Should().Be(DigitalLevel.High);
}
public void MultipleProviders_OneWritesAtaTime_NoConflicts()
{
var provider1 = new DigitalSignalProvider();
var provider2 = new DigitalSignalProvider();
var signal = new DigitalSignal();
provider1.ConnectTo(signal);
provider2.ConnectTo(signal);
provider1.Write(DigitalLevel.High);
provider1.Write(DigitalLevel.Floating);
provider2.Write(DigitalLevel.Low);
provider2.Write(DigitalLevel.Floating);
provider1.Write(DigitalLevel.PosEdge);
}
public void Write_MultipleConsumers_AllSeeChangedLevel()
{
var provider = new DigitalSignalProvider();
var consumer1 = new DigitalSignalConsumer();
var consumer2 = new DigitalSignalConsumer();
var signal = new DigitalSignal();
provider.ConnectTo(signal);
consumer1.ConnectTo(signal);
consumer2.ConnectTo(signal);
provider.Write(DigitalLevel.High);
consumer1.Level.Should().Be(DigitalLevel.High);
consumer2.Level.Should().Be(DigitalLevel.High);
}
public static DigitalSignal GetOrAddSignal(this DigitalSignalProvider provider, string signalName = null)
{
DigitalSignal signal = null;
if (!provider.IsConnected)
{
signal = new DigitalSignal(signalName);
provider.ConnectTo(signal);
}
else
{
signal = provider.DigitalSignal;
}
return(signal);
}
public static DigitalSignal ConnectTo(this DigitalSignalConsumer consumer, DigitalSignalProvider provider, string signalName = null)
{
DigitalSignal signal = Connect(provider, consumer);
if (signal == null)
{
if (signalName == null)
{
signalName = consumer.Name;
}
signal = consumer.GetOrAddSignal(signalName);
provider.ConnectTo(signal);
}
return(signal);
}
public void Connected_WriteHighTwice_NoChange()
{
var uut = new DigitalSignalProvider();
var signal = new DigitalSignal();
uut.ConnectTo(signal);
uut.Write(DigitalLevel.High);
var levels = new List <DigitalLevel>();
signal.OnChanged += (s, e) => levels.Add(e.Level);
var count = uut.Write(DigitalLevel.High);
count.Should().Be(0);
levels.Should().HaveCount(count);
}
public static DigitalSignalConsumer CreateConnection(this DigitalSignalProvider provider, DigitalSignalConsumer consumer = null, string signalName = null)
{
if (signalName == null && provider.Name != null)
{
signalName = provider.Name;
}
var signal = new DigitalSignal(signalName);
if (consumer == null)
{
consumer = new DigitalSignalConsumer();
}
consumer.ConnectTo(signal);
provider.ConnectTo(signal);
return(consumer);
}
public void Connected_WriteHigh_MovesToHigh()
{
var uut = new DigitalSignalProvider();
var signal = new DigitalSignal();
uut.ConnectTo(signal);
var levels = new List <DigitalLevel>();
signal.OnChanged += (s, e) => levels.Add(e.Level);
var count = uut.Write(DigitalLevel.High);
count.Should().Be(3);
levels.Should().HaveCount(count);
levels[0].Should().Be(DigitalLevel.Low);
levels[1].Should().Be(DigitalLevel.PosEdge);
levels[2].Should().Be(DigitalLevel.High);
}