Fixed plugin values which depended on the region settings of the computer (#1194)

app/Tests/Tools/ToolCalling/SearXNGScoreTests.cs

@@ -0,0 +1,39 @@
+using System.Globalization;
+using System.Text.Json.Nodes;
+
+using AIStudio.Tools.ToolCallingSystem.ToolCallingImplementations.WebSearch.SearXNG;
+
+namespace AIStudio.Tests.Tools.ToolCalling;
+
+/// <summary>
+/// Checks that the score of a SearXNG result is read the same way on every computer.
+/// </summary>
+/// <remarks>
+/// The score decides the order of the results. An instance may send it as a number or as text, both in the notation
+/// of JSON. All cases run under de-DE, where the period separates thousands: read with that culture, "0.75" was 75.
+/// </remarks>
+[TestFixture]
+[SetCulture("de-DE")]
+public sealed class SearXNGScoreTests
+{
+    [Test]
+    public void TheCultureReadsThePeriodAsAThousandsSeparator()
+    {
+        Assert.That(double.Parse("0.75", CultureInfo.CurrentCulture), Is.EqualTo(75), "Without that, the other cases check nothing.");
+    }
+
+    [TestCase("""{ "score": 0.75 }""")]
+    [TestCase("""{ "score": "0.75" }""")]
+    public void TheScoreIsReadTheSameOnEveryComputer(string json)
+    {
+        var result = JsonNode.Parse(json)!.AsObject();
+
+        var found = SearXNGSearchClient.TryGetScore(result, out var score);
+
+        using (Assert.EnterMultipleScope())
+        {
+            Assert.That(found, Is.True);
+            Assert.That(score, Is.EqualTo(0.75));
+        }
+    }
+}