test: add integration test for additional parameter inlining in projections

Author: Demivan

test/Riok.Mapperly.IntegrationTests/AdditionalParameterInliningMapperTest.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using System.Linq;
+using Riok.Mapperly.IntegrationTests.Mapper;
+using Riok.Mapperly.IntegrationTests.Models;
+using Shouldly;
+using Xunit;
+
+namespace Riok.Mapperly.IntegrationTests
+{
+    public class AdditionalParameterInliningMapperTest
+    {
+        [Fact]
+        public void ProjectWithAdditionalParameterShouldInline()
+        {
+            var objects = new List<IdObject> { new() { IdValue = 42 } }.AsQueryable();
+            var result = objects.ProjectWithAdditionalParameter(100).ToList();
+            result.ShouldHaveSingleItem();
+            result[0].IdValue.ShouldBe(42);
+            result[0].ValueFromParameter.ShouldBe(100);
+        }
+    }
+}

test/Riok.Mapperly.IntegrationTests/Mapper/AdditionalParameterInliningMapper.cs

@@ -0,0 +1,18 @@
+using System.Linq;
+using Riok.Mapperly.Abstractions;
+using Riok.Mapperly.IntegrationTests.Dto;
+using Riok.Mapperly.IntegrationTests.Models;
+
+namespace Riok.Mapperly.IntegrationTests.Mapper
+{
+    [Mapper]
+    public static partial class AdditionalParameterInliningMapper
+    {
+        private static partial AdditionalParametersDto MapToDto(IdObject source, int valueFromParameter);
+
+        public static partial IQueryable<AdditionalParametersDto> ProjectWithAdditionalParameter(
+            this IQueryable<IdObject> q,
+            int valueFromParameter
+        );
+    }
+}