Revert "Remove `Microsoft.DotNet.Watcher.Tools.FunctionalTests.NoDepsAppTests.RestartProcessThatTerminatesAfterFileChange`"

This reverts commit c68145f44f.

test/Microsoft.DotNet.Watcher.Tools.FunctionalTests/NoDepsAppTests.cs

@@ -51,6 +51,46 @@ namespace Microsoft.DotNet.Watcher.Tools.FunctionalTests
             }
         }
 
+        [Fact]
+        public void RestartProcessThatTerminatesAfterFileChange()
+        {
+            using (var scenario = new NoDepsAppScenario())
+            {
+                // Wait for the process to start
+                using (var wait = new WaitForFileToChange(scenario.StartedFile))
+                {
+                    scenario.RunDotNetWatch(scenario.StatusFile);
+
+                    wait.Wait(_defaultTimeout,
+                        expectedToChange: true,
+                        errorMessage: $"File not created: {scenario.StartedFile}");
+                }
+
+                // Then wait for the app to exit
+                Waiters.WaitForFileToBeReadable(scenario.StartedFile, _defaultTimeout);
+                var ids = File.ReadAllLines(scenario.StatusFile);
+                var procId = int.Parse(ids[0]);
+                Waiters.WaitForProcessToStop(
+                    procId,
+                    _defaultTimeout,
+                    expectedToStop: true,
+                    errorMessage: "Test app did not exit");
+
+                // Then wait for it to restart when we change a file
+                using (var wait = new WaitForFileToChange(scenario.StartedFile))
+                {
+                    var fileToChange = Path.Combine(scenario.TestAppFolder, "Program.cs");
+                    var programCs = File.ReadAllText(fileToChange);
+                    File.WriteAllText(fileToChange, programCs);
+
+                    wait.Wait(_defaultTimeout,
+                        expectedToChange: true,
+                        errorMessage: $"Process did not restart because {scenario.StartedFile} was not changed");
+                }
+            }
+        }
+
+
         [Fact]
         public void ExitOnChange()
         {