fallback decode utf8 strict to win 1250

StarterNG.Tests/LegacyDecodingTests.cs

@@ -0,0 +1,55 @@
+using System.Text;
+using StarterNG.Infrastructure.Adapters;
+using StarterNG.Tests.Fakes;
+
+namespace StarterNG.Tests;
+
+public class LegacyDecodingTests
+{
+    private const string Polish = "Zakład_Świętokrzyski_w_Kielcach";
+
+    [Fact]
+    public void A_code_page_1250_file_decodes_to_its_letters()
+    {
+        Assert.Equal(Polish, LegacyText.Decode(LegacyText.CodePage1250.GetBytes(Polish)));
+    }
+
+    [Fact]
+    public void A_file_re_saved_as_utf8_decodes_too()
+    {
+        // A handful of textures.txt in the wild are UTF-8; read as 1250 they turn
+        // "Zakład" into "ZakĹ‚ad".
+        Assert.Equal(Polish, LegacyText.Decode(Encoding.UTF8.GetBytes(Polish)));
+    }
+
+    [Fact]
+    public void Plain_ascii_reads_the_same_either_way()
+    {
+        Assert.Equal("PESA_Bydgoszcz", LegacyText.Decode(Encoding.ASCII.GetBytes("PESA_Bydgoszcz")));
+    }
+
+    [Fact]
+    public void A_utf8_textures_file_reaches_the_catalogue_intact()
+    {
+        var files = new InMemoryFileSystem().WithFile(
+            TestInstallation.At("dynamic", "pkp", "elf", "textures.txt"),
+            "en96-001.mat=34we,EN96,EN96-001 // v2,EN96-001,PREG,Zakład_Świętokrzyski,29.09.2011");
+        var installation = new TestInstallation(files);
+
+        installation.Vehicles.Load(installation.Library.Vehicles);
+
+        var meta = Assert.Single(installation.Library.Vehicles.Textures).Meta;
+        Assert.Equal("Zakład_Świętokrzyski".Replace('_', ' '), meta!.Depot);
+    }
+
+    [Fact]
+    public void A_code_page_1250_scenery_reaches_the_list_intact()
+    {
+        var files = new InMemoryFileSystem().WithLegacyFile(
+            TestInstallation.At("scenery", "td.scn"), "//$n Strzebiń - Woźniki Śl.");
+
+        var scenery = Assert.Single(new TestInstallation(files).Sceneries.LoadAll());
+
+        Assert.Equal("Strzebiń - Woźniki Śl.", scenery.Name);
+    }
+}