public static async Task ReceiveDeltas(HotReloadAgent hotReloadAgent)
{
Log("Attempting to receive deltas.");
// This value is configured by dotnet-watch when the app is to be launched.
var namedPipeName = Environment.GetEnvironmentVariable("DOTNET_HOTRELOAD_NAMEDPIPE_NAME") ??
throw new InvalidOperationException("DOTNET_HOTRELOAD_NAMEDPIPE_NAME was not specified.");
using var pipeClient = new NamedPipeClientStream(".", namedPipeName, PipeDirection.InOut, PipeOptions.CurrentUserOnly | PipeOptions.Asynchronous);
try
{
await pipeClient.ConnectAsync(5000);
Log("Connected.");
}
catch (TimeoutException)
{
Log("Unable to connect to hot-reload server.");
return;
}
while (pipeClient.IsConnected)
{
var update = await UpdatePayload.ReadAsync(pipeClient, default);
Log("Attempting to apply deltas.");
hotReloadAgent.ApplyDeltas(update.Deltas);
pipeClient.WriteByte((byte)ApplyResult.Success);
}
Log("Stopped received delta updates. Server is no longer connected.");
}
public void GetHandlerActions_DiscoversActionsOnTypeWithBothActions()
{
// Arrange
var actions = new HotReloadAgent.UpdateHandlerActions();
var log = new List <string>();
var agent = new HotReloadAgent(message => log.Add(message));
agent.GetHandlerActions(actions, typeof(HandlerWithBothActions));
Assert.Empty(log);
Assert.Single(actions.ClearCache);
Assert.Single(actions.UpdateApplication);
}
public void TopologicalSort_IgnoresUnknownReferencedAssemblies()
{
// Arrange
var assembly1 = GetAssembly("System.Private.CoreLib", Array.Empty <AssemblyName>());
var assembly2 = GetAssembly("System.Text.Json", new[] { new AssemblyName("netstandard"), new AssemblyName("System.Private.CoreLib"), });
var assembly3 = GetAssembly("Microsoft.AspNetCore.Components", new[] { new AssemblyName("System.Private.CoreLib"), new AssemblyName("Microsoft.Extensions.DependencyInjection"), });
var assembly4 = GetAssembly("Microsoft.AspNetCore.Components.Web", new[] { new AssemblyName("Microsoft.AspNetCore.Components"), new AssemblyName("System.Text.Json"), });
var sortedList = HotReloadAgent.TopologicalSort(new[] { assembly2, assembly4, assembly1, assembly3 });
// Assert
Assert.Equal(new[] { assembly1, assembly2, assembly3, assembly4 }, sortedList);
}
public void TopologicalSort_Works()
{
// Arrange
var assembly1 = GetAssembly("System.Private.CoreLib", Array.Empty <AssemblyName>());
var assembly2 = GetAssembly("System.Text.Json", new[] { new AssemblyName("System.Private.CoreLib"), });
var assembly3 = GetAssembly("Microsoft.AspNetCore.Components", new[] { new AssemblyName("System.Private.CoreLib"), });
var assembly4 = GetAssembly("Microsoft.AspNetCore.Components.Web", new[] { new AssemblyName("Microsoft.AspNetCore.Components"), new AssemblyName("System.Text.Json"), });
var sortedList = HotReloadAgent.TopologicalSort(new[] { assembly2, assembly4, assembly1, assembly3 });
// Assert
Assert.Equal(new[] { assembly1, assembly2, assembly3, assembly4 }, sortedList);
}
public void TopologicalSort_WithCycles()
{
// Arrange
var assembly1 = GetAssembly("System.Private.CoreLib", Array.Empty <AssemblyName>());
var assembly2 = GetAssembly("System.Text.Json", new[] { new AssemblyName("System.Collections.Immutable"), new AssemblyName("System.Private.CoreLib"), });
var assembly3 = GetAssembly("System.Collections.Immutable", new[] { new AssemblyName("System.Text.Json"), new AssemblyName("System.Private.CoreLib"), });
var assembly4 = GetAssembly("Microsoft.AspNetCore.Components", new[] { new AssemblyName("System.Private.CoreLib"), new AssemblyName("Microsoft.Extensions.DependencyInjection"), });
var assembly5 = GetAssembly("Microsoft.AspNetCore.Components.Web", new[] { new AssemblyName("Microsoft.AspNetCore.Components"), new AssemblyName("System.Text.Json"), });
var sortedList = HotReloadAgent.TopologicalSort(new[] { assembly2, assembly4, assembly1, assembly3, assembly5 });
// Assert
Assert.Equal(new[] { assembly1, assembly3, assembly2, assembly4, assembly5 }, sortedList);
}
public static void Initialize()
{
Task.Run(async() =>
{
using var hotReloadAgent = new HotReloadAgent(Log);
try
{
await ReceiveDeltas(hotReloadAgent);
}
catch (Exception ex)
{
Log(ex.Message);
}
});
}
public void GetHandlerActions_LogsMessageIfMethodHasIncorrectSignature()
{
// Arrange
var actions = new HotReloadAgent.UpdateHandlerActions();
var log = new List <string>();
var agent = new HotReloadAgent(message => log.Add(message));
var handlerType = typeof(HandlerWithIncorrectSignature);
agent.GetHandlerActions(actions, handlerType);
var message = Assert.Single(log);
Assert.Equal($"Type '{handlerType}' has method 'Void ClearCache()' that does not match the required signature.", message);
Assert.Empty(actions.ClearCache);
Assert.Single(actions.UpdateApplication);
}
public static void Initialize()
{
ClearHotReloadEnvironmentVariables(Environment.GetEnvironmentVariable, Environment.SetEnvironmentVariable);
Task.Run(async() =>
{
using var hotReloadAgent = new HotReloadAgent(Log);
try
{
await ReceiveDeltas(hotReloadAgent);
}
catch (Exception ex)
{
Log(ex.Message);
}
});
}
public void GetHandlerActions_LogsMessageIfNoActionsAreDiscovered()
{
// Arrange
var actions = new HotReloadAgent.UpdateHandlerActions();
var log = new List <string>();
var agent = new HotReloadAgent(message => log.Add(message));
var handlerType = typeof(HandlerWithNoActions);
agent.GetHandlerActions(actions, handlerType);
var message = Assert.Single(log);
Assert.Equal($"No invokable methods found on metadata handler type '{handlerType}'. " +
$"Allowed methods are ClearCache, UpdateApplication", message);
Assert.Empty(actions.ClearCache);
Assert.Empty(actions.UpdateApplication);
}
public void WebAssemblyHotReload_DiscoversMetadataHandlers_FromHot()
{
// Arrange
var hotReloadManager = typeof(Renderer).Assembly.GetType("Microsoft.AspNetCore.Components.HotReload.HotReloadManager");
Assert.NotNull(hotReloadManager);
var handlerActions = new HotReloadAgent.UpdateHandlerActions();
var logs = new List <string>();
var hotReloadAgent = new HotReloadAgent(logs.Add);
// Act
hotReloadAgent.GetHandlerActions(handlerActions, hotReloadManager);
// Assert
Assert.Empty(handlerActions.ClearCache);
Assert.Single(handlerActions.UpdateApplication);
}
