test(e2e): automate the launch of the Backend. Now e2e tests are fully automated.

Author: Xiphereal

Desktop.Tests/e2e/AppActions.cs

@@ -1,14 +1,25 @@
 using System;
 using Desktop.Tests.e2e.Drivers;
+using Desktop.Tests.e2e.Utils;
 
 namespace Desktop.Tests.e2e;
 
 public class AppActions : IDisposable
 {
-    private readonly MainWindowDriver mainWindow = new();
+    private readonly MainWindowDriver mainWindow;
+    private readonly BackendLauncher backendLauncher;
+
+    public AppActions()
+    {
+        backendLauncher = new BackendLauncher();
+        backendLauncher.Launch();
+
+        mainWindow = new MainWindowDriver();
+    }
 
     public void Dispose()
     {
+        backendLauncher.Dispose();
         mainWindow.Dispose();
     }
 

Desktop.Tests/e2e/Utils/BackendLauncher.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace Desktop.Tests.e2e.Utils;
+
+public class BackendLauncher : IDisposable
+{
+    private Process process;
+
+    /// <remarks>
+    ///     This is a tentative approach. It is error-prone, fragile and couples both
+    ///     the location of the Backend and its execution to the same machine that the
+    ///     Desktop app is running for the test.
+    ///     <para>
+    ///         Ideally, the desired version of the Backend to test will be deployed in
+    ///         a Docker container by the CI/CD pipeline, running health checks and
+    ///         ensuring it is reachable for this e2e tests.
+    ///     </para>
+    /// </remarks>
+    public void Launch()
+    {
+        var pathToBackend = Path.GetFullPath(
+            Path.Combine(
+                Environment.CurrentDirectory,
+                "..",
+                "..",
+                "..",
+                "..",
+                "Backend",
+                "Backend",
+                "Backend.csproj"));
+
+        var startInfo = new ProcessStartInfo
+        {
+            FileName = "dotnet",
+            Arguments =
+                $"run --project {pathToBackend} --applicationUrl http://localhost:5045",
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        };
+        process = Process.Start(startInfo);
+    }
+
+    public void Dispose()
+    {
+        process.Kill();
+    }
+}