Fixed providing message value with escape sequences to the attribute parameter

Author: Sviatoslav Bychkov

src/AutoLoggerMessageGenerator.UnitTests/VirtualLoggerMessage/VirtualLoggerMessageClassBuilderTests.Build_WithEscapeSequences_ShouldBuildAsItIs.verified.txt

@@ -0,0 +1,9 @@
+namespace Microsoft.Extensions.Logging.AutoLoggerMessage
+{
+    static partial class AutoLoggerMessage
+    {
+        // <LogCallMappingLocation>: Guid_1
+        [Microsoft.Extensions.Logging.LoggerMessageAttribute(Level = Microsoft.Extensions.Logging.LogLevel.Trace, Message = "All characters should be passed as a string literal expression: \n\r\t", SkipEnabledCheck = false)]
+        internal static partial void Log_SomeNamespaceSomeClass_3_33(Microsoft.Extensions.Logging.ILogger Logger, int @intParam, string @stringParam, bool @boolParam, SomeClass @classParam, SomeStruct @structParam);
+    }
+}

src/AutoLoggerMessageGenerator.UnitTests/VirtualLoggerMessage/VirtualLoggerMessageClassBuilderTests.cs

@@ -58,6 +58,26 @@ await Verify(syntaxTree)
             .ScrubInlineGuids();
     }
 
+    [Fact]
+    public async Task Build_WithEscapeSequences_ShouldBuildAsItIs()
+    {
+        var sut = new VirtualLoggerMessageClassBuilder(default);
+
+        var result = sut.Build([
+            _logCall with
+            {
+                Id = Guid.NewGuid(),
+                Location = new LogCallLocation("path/to/another/file.cs", 3, 33, Location.None),
+                Message = "All characters should be passed as a string literal expression: \n\r\t",
+                LogLevel = "Trace"
+            }
+        ]);
+
+        var syntaxTree = (await result.SyntaxTree.GetRootAsync()).NormalizeWhitespace().ToFullString();
+
+        await Verify(syntaxTree).ScrubInlineGuids();
+    }
+
     public static TheoryData<object, bool> TestConfigurations =
         new()
         {

src/AutoLoggerMessageGenerator/VirtualLoggerMessage/VirtualLoggerMessageClassBuilder.cs

@@ -81,7 +81,9 @@ private AttributeListSyntax GenerateLoggerMessageAttribute(LogCall logCall)
                             ParseExpression(
                                 $"Level = {Constants.DefaultLoggingNamespace}.LogLevel.{logCall.LogLevel}")),
                         AttributeArgument(
-                            ParseExpression($"Message = \"{logCall.Message}\"")),
+                            AssignmentExpression(SyntaxKind.SimpleAssignmentExpression,
+                                IdentifierName("Message"),
+                                LiteralExpression(SyntaxKind.StringLiteralExpression, Literal(logCall.Message)))),
                         AttributeArgument(
                             ParseExpression(
                                 $"SkipEnabledCheck = {configuration.GenerateSkipEnabledCheck.ToLowerBooleanString()}"))