transformed my shitty test code into nuint tests

ParadoxSaveParser.Lib.Tests/SearchExpressionTests.cs

@@ -0,0 +1,49 @@
+using System.Text.Encodings.Web;
+using System.Text.Json;
+using DTLib.Extensions;
+
+namespace ParadoxSaveParser.Lib.Tests;
+
+[TestFixture]
+[TestOf(typeof(ISearchExpression))]
+public class SearchExpressionTests
+{
+    byte[] _smallSaveData;
+    
+    [SetUp]
+    public void Setup()
+    {
+        _smallSaveData = "EU4txt a={ b={ c=0 d=1 e=2 } f=3 }".ToBytes();
+    }
+
+    
+    private static JsonSerializerOptions _smallSaveSerializerOptions = new()
+    {
+        WriteIndented = false,
+        Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
+        MaxDepth = 1024,
+    };
+
+    internal static string JsonToPdx(string json) =>
+        json.Substring(1, json.Length - 2)
+            .Replace(",", " ").Replace("{", "{ ").Replace("}", " }")
+            .Replace("\"", "").Replace("[", "").Replace("]", "").Replace(":", "=");
+
+    [TestCase("a", "a={ b={ c=0 d=1 e=2 } f=3 }")]
+    [TestCase("a.*", "a={ b={ c=0 d=1 e=2 } f=3 }")]
+    [TestCase("a.b", "a={ b={ c=0 d=1 e=2 } }")]
+    [TestCase("a.[0].c", "a={ b={ c=0 } }")]
+    [TestCase("a.[1]", "a={ f=3 }")]
+    [TestCase("a.b.(c|d)", "a={ b={ c=0 d=1 } }")]
+    [TestCase("a.(b.e|f)", "a={ b={ e=2 } f=3 }")]
+    public void TestSearchOnSmallData(string input, string expectedOutput)
+    {
+        using var saveStream = new MemoryStream(_smallSaveData, false);
+        var se = SearchExpressionCompiler.Compile(input);
+        var parser = new SaveParserEU4(saveStream, se);
+        var rootNode = parser.Parse();
+        string json = JsonSerializer.Serialize(rootNode, _smallSaveSerializerOptions);
+        string pdx = JsonToPdx(json);
+        Assert.That(pdx, Is.EqualTo(expectedOutput));
+    }
+}