Fixing edge case with null coalescing (#1681)

closes #1573

Author: belav

Src/CSharpier.Core/CSharp/SyntaxPrinter/SyntaxNodePrinters/BinaryExpression.cs

@@ -84,12 +84,62 @@ private static List<Doc> PrintBinaryExpression(SyntaxNode node, PrintingContext
             var binaryOnTheRight = binaryExpressionSyntax.Kind() == SyntaxKind.CoalesceExpression;
             if (binaryOnTheRight)
             {
-                docs.Add(
-                    Node.Print(binaryExpressionSyntax.Left, context),
-                    Doc.Line,
-                    Token.Print(binaryExpressionSyntax.OperatorToken, context),
-                    " "
-                );
+                var chain = 0;
+                var possibleInvocation = binaryExpressionSyntax.Left;
+                while (possibleInvocation is not null)
+                {
+                    if (possibleInvocation is InvocationExpressionSyntax invocationExpression)
+                    {
+                        possibleInvocation = invocationExpression.Expression;
+                        chain++;
+                    }
+                    else if (
+                        possibleInvocation
+                        is MemberAccessExpressionSyntax memberAccessExpressionSyntax
+                    )
+                    {
+                        possibleInvocation = memberAccessExpressionSyntax.Expression;
+                        chain++;
+                    }
+                    else if (
+                        possibleInvocation
+                        is ConditionalAccessExpressionSyntax conditionalAccessExpressionSyntax
+                    )
+                    {
+                        possibleInvocation = conditionalAccessExpressionSyntax.Expression;
+                        chain++;
+                    }
+                    else if (
+                        possibleInvocation
+                        is ElementAccessExpressionSyntax elementAccessExpressionSyntax
+                    )
+                    {
+                        possibleInvocation = elementAccessExpressionSyntax.Expression;
+                        chain++;
+                    }
+                    else
+                    {
+                        possibleInvocation = null;
+                    }
+                }
+                var leftDoc = Node.Print(binaryExpressionSyntax.Left, context);
+                if (chain > 3)
+                {
+                    docs.Add(
+                        Doc.Group(leftDoc, Doc.Line),
+                        Token.Print(binaryExpressionSyntax.OperatorToken, context),
+                        " "
+                    );
+                }
+                else
+                {
+                    docs.Add(
+                        leftDoc,
+                        Doc.Line,
+                        Token.Print(binaryExpressionSyntax.OperatorToken, context),
+                        " "
+                    );
+                }
             }
 
             var possibleBinary = binaryOnTheRight

Src/CSharpier.Tests/FormattingTests/TestFiles/cs/BinaryExpressions.test

@@ -200,6 +200,31 @@ class TestClass
                 someLongValue__________________________________________
             ) ?? someOtherValue;
 
+        var x =
+            someValue
+                .Property.CallLongMethod_____________________________________()
+                .CallMethod__________()
+            ?? throw new Exception();
+
+        var x =
+            someValue
+                .Property.CallLongMethod_____________________________________()
+                .CallLongMethod___________________________________________________()
+            ?? throw new Exception();
+
+        return SomeObject.CallSomeMethod___________()
+            ?? SomeObject.CallSomeMethod___________()
+            ?? new SomeObject();
+
+        var storeObject =
+            entityType.GetSchemaQualifiedTableName()
+            ?? entityType.GetInsertStoredProcedure()?.GetSchemaQualifiedName()
+            ?? entityType.GetDeleteStoredProcedure()?.GetSchemaQualifiedName()
+            ?? entityType.GetUpdateStoredProcedure()?.GetSchemaQualifiedName();
+
+        return parameterDescriptor.BindingInfo.Binder
+            ?? Binders.GetBinder(parameterDescriptor.ParameterType);
+
         var notIdealSee355 =
             variable
                 .Replace(someParameter_______________________, '.')