add extra test case

Author: Andarist

tests/baselines/reference/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.js

@@ -0,0 +1,17 @@
+//// [tests/cases/compiler/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts] ////
+
+//// [declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts]
+type InputType = { enable_member_receipts?: boolean };
+type AsEmptyObject<T> = { [K in keyof T]?: undefined };
+
+export const test = {
+  ...({} as AsEmptyObject<InputType>),
+};
+
+
+
+
+//// [declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.d.ts]
+export declare const test: {
+    enable_member_receipts?: undefined;
+};

tests/baselines/reference/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.symbols

@@ -0,0 +1,22 @@
+//// [tests/cases/compiler/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts] ////
+
+=== declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts ===
+type InputType = { enable_member_receipts?: boolean };
+>InputType : Symbol(InputType, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 0, 0))
+>enable_member_receipts : Symbol(enable_member_receipts, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 0, 18))
+
+type AsEmptyObject<T> = { [K in keyof T]?: undefined };
+>AsEmptyObject : Symbol(AsEmptyObject, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 0, 54))
+>T : Symbol(T, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 1, 19))
+>K : Symbol(K, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 1, 27))
+>T : Symbol(T, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 1, 19))
+
+export const test = {
+>test : Symbol(test, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 3, 12))
+
+  ...({} as AsEmptyObject<InputType>),
+>AsEmptyObject : Symbol(AsEmptyObject, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 0, 54))
+>InputType : Symbol(InputType, Decl(declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts, 0, 0))
+
+};
+

tests/baselines/reference/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.types

@@ -0,0 +1,29 @@
+//// [tests/cases/compiler/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts] ////
+
+=== declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts ===
+type InputType = { enable_member_receipts?: boolean };
+>InputType : InputType
+>          : ^^^^^^^^^
+>enable_member_receipts : boolean
+>                       : ^^^^^^^
+
+type AsEmptyObject<T> = { [K in keyof T]?: undefined };
+>AsEmptyObject : AsEmptyObject<T>
+>              : ^^^^^^^^^^^^^^^^
+
+export const test = {
+>test : { enable_member_receipts?: undefined; }
+>     : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+>{  ...({} as AsEmptyObject<InputType>),} : { enable_member_receipts?: undefined; }
+>                                         : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+  ...({} as AsEmptyObject<InputType>),
+>({} as AsEmptyObject<InputType>) : AsEmptyObject<InputType>
+>                                 : ^^^^^^^^^^^^^^^^^^^^^^^^
+>{} as AsEmptyObject<InputType> : AsEmptyObject<InputType>
+>                               : ^^^^^^^^^^^^^^^^^^^^^^^^
+>{} : {}
+>   : ^^
+
+};
+

tests/cases/compiler/declarationEmitOptionalMappedTypePropertyNoStrictNullChecks4.ts

@@ -0,0 +1,10 @@
+// @strictNullChecks: false
+// @declaration: true
+// @emitDeclarationOnly: true
+
+type InputType = { enable_member_receipts?: boolean };
+type AsEmptyObject<T> = { [K in keyof T]?: undefined };
+
+export const test = {
+  ...({} as AsEmptyObject<InputType>),
+};