Add regression testing for the STJv8 source generator.

src/libraries/System.Text.Json/tests/System.Text.Json.Tests/SourceGenRegressionTests/Net80/Net80GeneratedContext.ClassWithCustomConverter.g.cs

@@ -0,0 +1,42 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Source files represent a source generated JsonSerializerContext as produced by the .NET 8 SDK.
+// Used to validate correctness of contexts generated by previous SDKs against the current System.Text.Json runtime components.
+// Unless absolutely necessary DO NOT MODIFY any of these files -- it would invalidate the purpose of the regression tests.
+
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace System.Text.Json.Tests.SourceGenRegressionTests.Net80
+{
+    public partial class Net80GeneratedContext
+    {
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter>? _ClassWithCustomConverter;
+
+        /// <summary>
+        /// Defines the source generated JSON serialization contract metadata for a given type.
+        /// </summary>
+        public global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter> ClassWithCustomConverter
+        {
+            get => _ClassWithCustomConverter ??= (global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter>)Options.GetTypeInfo(typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter));
+        }
+
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter> Create_ClassWithCustomConverter(global::System.Text.Json.JsonSerializerOptions options)
+        {
+            if (!TryGetTypeInfoForRuntimeCustomConverter<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter>(options, out global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter> jsonTypeInfo))
+            {
+                global::System.Text.Json.Serialization.JsonConverter converter = ExpandConverter(typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter), new global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter.CustomConverter(), options);
+                jsonTypeInfo = global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.CreateValueInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter> (options, converter);
+            }
+
+            jsonTypeInfo.OriginatingResolver = this;
+            return jsonTypeInfo;
+        }
+    }
+}

src/libraries/System.Text.Json/tests/System.Text.Json.Tests/SourceGenRegressionTests/Net80/Net80GeneratedContext.DateTimeOffset.g.cs

@@ -0,0 +1,41 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Source files represent a source generated JsonSerializerContext as produced by the .NET 8 SDK.
+// Used to validate correctness of contexts generated by previous SDKs against the current System.Text.Json runtime components.
+// Unless absolutely necessary DO NOT MODIFY any of these files -- it would invalidate the purpose of the regression tests.
+
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace System.Text.Json.Tests.SourceGenRegressionTests.Net80
+{
+    public partial class Net80GeneratedContext
+    {
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.DateTimeOffset>? _DateTimeOffset;
+
+        /// <summary>
+        /// Defines the source generated JSON serialization contract metadata for a given type.
+        /// </summary>
+        public global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.DateTimeOffset> DateTimeOffset
+        {
+            get => _DateTimeOffset ??= (global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.DateTimeOffset>)Options.GetTypeInfo(typeof(global::System.DateTimeOffset));
+        }
+
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.DateTimeOffset> Create_DateTimeOffset(global::System.Text.Json.JsonSerializerOptions options)
+        {
+            if (!TryGetTypeInfoForRuntimeCustomConverter<global::System.DateTimeOffset>(options, out global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.DateTimeOffset> jsonTypeInfo))
+            {
+                jsonTypeInfo = global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.CreateValueInfo<global::System.DateTimeOffset>(options, global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.DateTimeOffsetConverter);
+            }
+
+            jsonTypeInfo.OriginatingResolver = this;
+            return jsonTypeInfo;
+        }
+    }
+}

src/libraries/System.Text.Json/tests/System.Text.Json.Tests/SourceGenRegressionTests/Net80/Net80GeneratedContext.DictionaryStringHighLowTemps.g.cs

@@ -0,0 +1,69 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Source files represent a source generated JsonSerializerContext as produced by the .NET 8 SDK.
+// Used to validate correctness of contexts generated by previous SDKs against the current System.Text.Json runtime components.
+// Unless absolutely necessary DO NOT MODIFY any of these files -- it would invalidate the purpose of the regression tests.
+
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace System.Text.Json.Tests.SourceGenRegressionTests.Net80
+{
+    public partial class Net80GeneratedContext
+    {
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>>? _DictionaryStringHighLowTemps;
+
+        /// <summary>
+        /// Defines the source generated JSON serialization contract metadata for a given type.
+        /// </summary>
+        public global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>> DictionaryStringHighLowTemps
+        {
+            get => _DictionaryStringHighLowTemps ??= (global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>>)Options.GetTypeInfo(typeof(global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>));
+        }
+
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>> Create_DictionaryStringHighLowTemps(global::System.Text.Json.JsonSerializerOptions options)
+        {
+            if (!TryGetTypeInfoForRuntimeCustomConverter<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>>(options, out global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>> jsonTypeInfo))
+            {
+                var info = new global::System.Text.Json.Serialization.Metadata.JsonCollectionInfoValues<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>>
+                {
+                    ObjectCreator = () => new global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>(),
+                    SerializeHandler = DictionaryStringHighLowTempsSerializeHandler
+                };
+
+                jsonTypeInfo = global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.CreateDictionaryInfo<global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>, string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>(options, info);
+                jsonTypeInfo.NumberHandling = null;
+            }
+
+            jsonTypeInfo.OriginatingResolver = this;
+            return jsonTypeInfo;
+        }
+
+        // Intentionally not a static method because we create a delegate to it. Invoking delegates to instance
+        // methods is almost as fast as virtual calls. Static methods need to go through a shuffle thunk.
+        private void DictionaryStringHighLowTempsSerializeHandler(global::System.Text.Json.Utf8JsonWriter writer, global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>? value)
+        {
+            if (value == null)
+            {
+                writer.WriteNullValue();
+                return;
+            }
+
+            writer.WriteStartObject();
+
+            foreach (global::System.Collections.Generic.KeyValuePair<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps> entry in value)
+            {
+                writer.WritePropertyName(entry.Key);
+                HighLowTempsSerializeHandler(writer, entry.Value);
+            }
+
+            writer.WriteEndObject();
+        }
+    }
+}

src/libraries/System.Text.Json/tests/System.Text.Json.Tests/SourceGenRegressionTests/Net80/Net80GeneratedContext.GetJsonTypeInfo.g.cs

@@ -0,0 +1,72 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Source files represent a source generated JsonSerializerContext as produced by the .NET 8 SDK.
+// Used to validate correctness of contexts generated by previous SDKs against the current System.Text.Json runtime components.
+// Unless absolutely necessary DO NOT MODIFY any of these files -- it would invalidate the purpose of the regression tests.
+
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace System.Text.Json.Tests.SourceGenRegressionTests.Net80
+{
+    public partial class Net80GeneratedContext : global::System.Text.Json.Serialization.Metadata.IJsonTypeInfoResolver
+    {
+        /// <inheritdoc/>
+        public override global::System.Text.Json.Serialization.Metadata.JsonTypeInfo? GetTypeInfo(global::System.Type type)
+        {
+            Options.TryGetTypeInfo(type, out global::System.Text.Json.Serialization.Metadata.JsonTypeInfo? typeInfo);
+            return typeInfo;
+        }
+
+        global::System.Text.Json.Serialization.Metadata.JsonTypeInfo? global::System.Text.Json.Serialization.Metadata.IJsonTypeInfoResolver.GetTypeInfo(global::System.Type type, global::System.Text.Json.JsonSerializerOptions options)
+        {
+            if (type == typeof(global::System.Collections.Generic.Dictionary<string, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>))
+            {
+                return Create_DictionaryStringHighLowTemps(options);
+            }
+            if (type == typeof(global::System.Collections.Generic.List<global::System.DateTimeOffset>))
+            {
+                return Create_ListDateTimeOffset(options);
+            }
+            if (type == typeof(global::System.DateTimeOffset))
+            {
+                return Create_DateTimeOffset(options);
+            }
+            if (type == typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.ClassWithCustomConverter))
+            {
+                return Create_ClassWithCustomConverter(options);
+            }
+            if (type == typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps))
+            {
+                return Create_HighLowTemps(options);
+            }
+            if (type == typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.MyLinkedList))
+            {
+                return Create_MyLinkedList(options);
+            }
+            if (type == typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.WeatherForecastWithPOCOs))
+            {
+                return Create_WeatherForecastWithPOCOs(options);
+            }
+            if (type == typeof(int))
+            {
+                return Create_Int32(options);
+            }
+            if (type == typeof(string))
+            {
+                return Create_String(options);
+            }
+            if (type == typeof(string[]))
+            {
+                return Create_StringArray(options);
+            }
+            return null;
+        }
+    }
+}

src/libraries/System.Text.Json/tests/System.Text.Json.Tests/SourceGenRegressionTests/Net80/Net80GeneratedContext.HighLowTemps.g.cs

@@ -0,0 +1,114 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Source files represent a source generated JsonSerializerContext as produced by the .NET 8 SDK.
+// Used to validate correctness of contexts generated by previous SDKs against the current System.Text.Json runtime components.
+// Unless absolutely necessary DO NOT MODIFY any of these files -- it would invalidate the purpose of the regression tests.
+
+// <auto-generated/>
+
+#nullable enable annotations
+#nullable disable warnings
+
+// Suppress warnings about [Obsolete] member usage in generated code.
+#pragma warning disable CS0612, CS0618
+
+namespace System.Text.Json.Tests.SourceGenRegressionTests.Net80
+{
+    public partial class Net80GeneratedContext
+    {
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>? _HighLowTemps;
+
+        /// <summary>
+        /// Defines the source generated JSON serialization contract metadata for a given type.
+        /// </summary>
+        public global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps> HighLowTemps
+        {
+            get => _HighLowTemps ??= (global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>)Options.GetTypeInfo(typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps));
+        }
+
+        private global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps> Create_HighLowTemps(global::System.Text.Json.JsonSerializerOptions options)
+        {
+            if (!TryGetTypeInfoForRuntimeCustomConverter<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>(options, out global::System.Text.Json.Serialization.Metadata.JsonTypeInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps> jsonTypeInfo))
+            {
+                var objectInfo = new global::System.Text.Json.Serialization.Metadata.JsonObjectInfoValues<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>
+                {
+                    ObjectCreator = () => new global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps(),
+                    ObjectWithParameterizedConstructorCreator = null,
+                    PropertyMetadataInitializer = _ => HighLowTempsPropInit(options),
+                    ConstructorParameterMetadataInitializer = null,
+                    SerializeHandler = HighLowTempsSerializeHandler
+                };
+
+                jsonTypeInfo = global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.CreateObjectInfo<global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps>(options, objectInfo);
+                jsonTypeInfo.NumberHandling = null;
+            }
+
+            jsonTypeInfo.OriginatingResolver = this;
+            return jsonTypeInfo;
+        }
+
+        private static global::System.Text.Json.Serialization.Metadata.JsonPropertyInfo[] HighLowTempsPropInit(global::System.Text.Json.JsonSerializerOptions options)
+        {
+            var properties = new global::System.Text.Json.Serialization.Metadata.JsonPropertyInfo[2];
+
+            var info0 = new global::System.Text.Json.Serialization.Metadata.JsonPropertyInfoValues<int>
+            {
+                IsProperty = true,
+                IsPublic = true,
+                IsVirtual = false,
+                DeclaringType = typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps),
+                Converter = null,
+                Getter = static obj => ((global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps)obj).High,
+                Setter = static (obj, value) => ((global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps)obj).High = value!,
+                IgnoreCondition = null,
+                HasJsonInclude = false,
+                IsExtensionData = false,
+                NumberHandling = null,
+                PropertyName = "High",
+                JsonPropertyName = null
+            };
+
+            properties[0] = global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.CreatePropertyInfo<int>(options, info0);
+
+            var info1 = new global::System.Text.Json.Serialization.Metadata.JsonPropertyInfoValues<int>
+            {
+                IsProperty = true,
+                IsPublic = true,
+                IsVirtual = false,
+                DeclaringType = typeof(global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps),
+                Converter = null,
+                Getter = static obj => ((global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps)obj).Low,
+                Setter = static (obj, value) => ((global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps)obj).Low = value!,
+                IgnoreCondition = null,
+                HasJsonInclude = false,
+                IsExtensionData = false,
+                NumberHandling = null,
+                PropertyName = "Low",
+                JsonPropertyName = null
+            };
+
+            properties[1] = global::System.Text.Json.Serialization.Metadata.JsonMetadataServices.CreatePropertyInfo<int>(options, info1);
+
+            return properties;
+        }
+
+        // Intentionally not a static method because we create a delegate to it. Invoking delegates to instance
+        // methods is almost as fast as virtual calls. Static methods need to go through a shuffle thunk.
+        private void HighLowTempsSerializeHandler(global::System.Text.Json.Utf8JsonWriter writer, global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps? value)
+        {
+            if (value == null)
+            {
+                writer.WriteNullValue();
+                return;
+            }
+
+            writer.WriteStartObject();
+
+            writer.WriteNumber(PropName_High, ((global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps)value).High);
+            writer.WriteNumber(PropName_Low, ((global::System.Text.Json.Tests.SourceGenRegressionTests.Net80.HighLowTemps)value).Low);
+
+            writer.WriteEndObject();
+        }
+    }
+}