fix(cli): resolve CLI-008..013 — format validation, exit-code semantics, debug-stream cancellation/disposal, test coverage

tests/ScadaLink.CLI.Tests/FormatOptionValidationTests.cs

@@ -0,0 +1,44 @@
+using System.CommandLine;
+using ScadaLink.CLI.Commands;
+
+namespace ScadaLink.CLI.Tests;
+
+/// <summary>
+/// Regression tests for CLI-008 — the <c>--format</c> option previously accepted any
+/// string, so a typo like <c>--format tabel</c> silently fell through to JSON output
+/// with no feedback. The option must reject values outside {json, table} with a parse
+/// error.
+/// </summary>
+public class FormatOptionValidationTests
+{
+    [Theory]
+    [InlineData("json")]
+    [InlineData("table")]
+    public void FormatOption_AcceptsValidValues(string value)
+    {
+        var formatOption = CliOptions.CreateFormatOption();
+        var root = new RootCommand();
+        root.Add(formatOption);
+
+        var result = root.Parse(new[] { "--format", value });
+
+        Assert.Empty(result.Errors);
+    }
+
+    [Theory]
+    [InlineData("tabel")]
+    [InlineData("xml")]
+    [InlineData("yaml")]
+    [InlineData("")]
+    [InlineData("JSON")] // case-sensitive: documented values are lowercase
+    public void FormatOption_RejectsInvalidValues(string value)
+    {
+        var formatOption = CliOptions.CreateFormatOption();
+        var root = new RootCommand();
+        root.Add(formatOption);
+
+        var result = root.Parse(new[] { "--format", value });
+
+        Assert.NotEmpty(result.Errors);
+    }
+}