feat(cli): scadalink audit query subcommand (#23 M8)

tests/ScadaLink.CLI.Tests/Commands/AuditCommandTestHarness.cs

@@ -0,0 +1,39 @@
+using System.CommandLine;
+using ScadaLink.CLI.Commands;
+
+namespace ScadaLink.CLI.Tests.Commands;
+
+/// <summary>
+/// Shared helpers for invoking the <c>audit</c> command tree in tests and capturing
+/// stdout/stderr/exit code.
+/// </summary>
+internal static class AuditCommandTestHarness
+{
+    public static RootCommand BuildRoot()
+    {
+        var url = new Option<string>("--url") { Recursive = true };
+        var username = new Option<string>("--username") { Recursive = true };
+        var password = new Option<string>("--password") { Recursive = true };
+        var format = CliOptions.CreateFormatOption();
+
+        var root = new RootCommand();
+        root.Add(url);
+        root.Add(username);
+        root.Add(password);
+        root.Add(format);
+        root.Add(AuditCommands.Build(url, format, username, password));
+        return root;
+    }
+
+    public static (int Exit, string Out, string Err) Invoke(RootCommand root, params string[] args)
+    {
+        var output = new StringWriter();
+        var error = new StringWriter();
+        var exit = root.Parse(args).Invoke(new InvocationConfiguration
+        {
+            Output = output,
+            Error = error,
+        });
+        return (exit, output.ToString(), error.ToString());
+    }
+}