feat: Un-ignore test 19.07 (#579)

Fixes #203

src/Chapter19.Tests/Listing19.07.Tests.cs

@@ -1,27 +1,27 @@
-
-namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter19.Listing19_07.Tests;
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter19.Listing19_07.Tests;
 
 [TestClass]
 public class ProgramTests
 {
-    [TestMethod][Ignore]
+    [TestMethod]
     public void ValueTaskAsyncReturnTest()
     {
-        string expected = @"3:0047:Throwing exception.
-3:0052:Unhandled exception handler starting.
-3:0055:Sleeping for 4000 ms
-1:0058:Sleeping for 2000 ms
-1:2059:Awake
-1:2060:Finally block running.
-3:4059:Awake
-Unhandled Exception: System.Exception: Exception of type 'System.Exception' was thrown.
-";
+        string expected =
+@"Sleeping for 2000 ms
+Throwing exception.
+Event handler starting
+Sleeping for 4000 ms
+Awake
+Finally block running.";
 
-        IntelliTect.TestTools.Console.ConsoleAssert.Expect(expected,
-        () =>
-        {
-            Program.Main();
-        });
+        string output = IntelliTect.TestTools.Console.ConsoleAssert.Execute(string.Empty,
+        Program.Main).TrimEnd();
 
+        // Assert that all expected lines are present.
+        Assert.IsTrue(expected.Split(Environment.NewLine).All(output.Contains));
+
+        // Assert that the thread ID (first number in each line) is not the same for all lines.
+        Assert.AreEqual(2, output.Split(Environment.NewLine).Select(
+            line => line.Split(':')[0]).Distinct().Count());
     }
 }

src/Chapter19/Listing19.07.RegisteringForUnhandledExceptions.cs

@@ -50,7 +50,7 @@ static void Delay(int i)
     static void Message(string text)
     {
         Console.WriteLine("{0}:{1:0000}:{2}",
-            Thread.CurrentThread.ManagedThreadId,
+            Environment.CurrentManagedThreadId,
             Clock.ElapsedMilliseconds, text);
     }
 }