Fix incorrect binding language detection and prioritization for Visual Studio extension

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 ## Bug fixes:
 * Fix: Ambiguous steps reported wehn definition matches via more than one tag (#95)
+* Fix incorrect reading of binding language (#104)
+
 *Contributors of this release (in alphabetical order):* @clrudolphi
 
 # v2025.1.256 - 2025-03-07

Reqnroll.VisualStudio/Configuration/ReqnrollConfigDeserializer.cs

@@ -15,7 +15,7 @@ public void Populate(string jsonString, DeveroomConfiguration config)
             config.DefaultFeatureLanguage = featureLanguage;
         if (reqnrollJsonConfiguration.Language != null &&
             reqnrollJsonConfiguration.Language.TryGetValue("binding", out var bindingCulture))
-            config.DefaultFeatureLanguage = bindingCulture;
+            config.ConfiguredBindingCulture = bindingCulture;
         if (reqnrollJsonConfiguration.BindingCulture != null &&
             reqnrollJsonConfiguration.BindingCulture.TryGetValue("name", out var bindingCultureFromSpecFlow))
             config.ConfiguredBindingCulture = bindingCultureFromSpecFlow;

Tests/Reqnroll.VisualStudio.Tests/Configuration/ReqnrollConfigDeserializerTests.cs

@@ -0,0 +1,152 @@
+#nullable disable
+
+using FluentAssertions;
+using Reqnroll.VisualStudio.Configuration;
+using Xunit;
+
+namespace Reqnroll.VisualStudio.Tests.Configuration;
+
+public class ReqnrollConfigDeserializerTests
+{
+    [Fact]
+    public void Should_set_feature_language_from_reqnroll_json()
+    {
+        // Arrange
+        var deserializer = new ReqnrollConfigDeserializer();
+        var config = new DeveroomConfiguration();
+        var json = """
+        {
+          "language": {
+            "feature": "hu-HU"
+          }
+        }
+        """;
+
+        // Act
+        deserializer.Populate(json, config);
+
+        // Assert
+        config.DefaultFeatureLanguage.Should().Be("hu-HU");
+        config.ConfiguredBindingCulture.Should().BeNull();
+        config.BindingCulture.Should().Be("hu-HU"); // Falls back to feature language
+    }
+
+    [Fact]
+    public void Should_set_binding_culture_from_reqnroll_json()
+    {
+        // Arrange
+        var deserializer = new ReqnrollConfigDeserializer();
+        var config = new DeveroomConfiguration();
+        var json = """
+        {
+          "language": {
+            "binding": "fr-FR"
+          }
+        }
+        """;
+
+        // Act
+        deserializer.Populate(json, config);
+
+        // Assert
+        config.DefaultFeatureLanguage.Should().Be("en-US"); // Should remain default
+        config.ConfiguredBindingCulture.Should().Be("fr-FR");
+        config.BindingCulture.Should().Be("fr-FR");
+    }
+
+    [Fact]
+    public void Should_set_both_feature_and_binding_languages_from_reqnroll_json()
+    {
+        // Arrange
+        var deserializer = new ReqnrollConfigDeserializer();
+        var config = new DeveroomConfiguration();
+        var json = """
+        {
+          "language": {
+            "feature": "en-US",
+            "binding": "fr-FR"
+          }
+        }
+        """;
+
+        // Act
+        deserializer.Populate(json, config);
+
+        // Assert
+        config.DefaultFeatureLanguage.Should().Be("en-US");
+        config.ConfiguredBindingCulture.Should().Be("fr-FR");
+        config.BindingCulture.Should().Be("fr-FR");
+    }
+
+    [Fact]
+    public void Should_keep_defaults_when_no_language_configuration()
+    {
+        // Arrange
+        var deserializer = new ReqnrollConfigDeserializer();
+        var config = new DeveroomConfiguration();
+        var json = """
+        {
+          "trace": {
+            "stepDefinitionSkeletonStyle": "CucumberExpressionAttribute"
+          }
+        }
+        """;
+
+        // Act
+        deserializer.Populate(json, config);
+
+        // Assert
+        config.DefaultFeatureLanguage.Should().Be("en-US"); // Default
+        config.ConfiguredBindingCulture.Should().BeNull(); // Default
+        config.BindingCulture.Should().Be("en-US"); // Falls back to feature language
+    }
+
+    [Fact]
+    public void Should_support_legacy_specflow_binding_culture_format()
+    {
+        // Arrange
+        var deserializer = new ReqnrollConfigDeserializer();
+        var config = new DeveroomConfiguration();
+        var json = """
+        {
+          "bindingCulture": {
+            "name": "de-DE"
+          }
+        }
+        """;
+
+        // Act
+        deserializer.Populate(json, config);
+
+        // Assert
+        config.DefaultFeatureLanguage.Should().Be("en-US"); // Default
+        config.ConfiguredBindingCulture.Should().Be("de-DE");
+        config.BindingCulture.Should().Be("de-DE");
+    }
+
+    [Fact]
+    public void Should_prioritize_language_binding_over_legacy_bindingCulture()
+    {
+        // Arrange
+        var deserializer = new ReqnrollConfigDeserializer();
+        var config = new DeveroomConfiguration();
+        var json = """
+        {
+          "language": {
+            "binding": "fr-FR"
+          },
+          "bindingCulture": {
+            "name": "de-DE"
+          }
+        }
+        """;
+
+        // Act
+        deserializer.Populate(json, config);
+
+        // Assert
+        config.DefaultFeatureLanguage.Should().Be("en-US"); // Default
+        config.ConfiguredBindingCulture.Should().Be("de-DE"); // Legacy format processed last, overwrites
+        config.BindingCulture.Should().Be("de-DE");
+    }
+}