added EndToEnd test for free license

Author: gprossliner

test/SeqCli.EndToEnd/License/LicenceShowTestCase.cs

@@ -0,0 +1,36 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using Seq.Api;
+using SeqCli.EndToEnd.Support;
+using Serilog;
+using Xunit;
+
+namespace SeqCli.EndToEnd.License;
+
+public class LicenseShowTestCase : ICliTestCase
+{
+    readonly TestDataFolder _testDataFolder;
+
+    public LicenseShowTestCase(TestDataFolder testDataFolder)
+    {
+        _testDataFolder = testDataFolder;
+    }
+
+    public Task ExecuteAsync(SeqConnection connection, ILogger logger, CliCommandRunner runner)
+    {
+
+        // test empty text output if no license is applied
+        runner.Exec("license show");
+        Assert.Equal(
+            "",
+            runner.LastRunProcess.Output.Trim());
+
+        // test json output if no license is applied
+        runner.Exec("license show --json");
+        Assert.Contains(
+            "You're using the free Individual license.",
+            runner.LastRunProcess.Output.Trim());
+        return Task.CompletedTask;
+    }
+}