Add test cases for top level "for await of".

Author: hikarino-my

tests/baselines/reference/awaitInNonAsyncFunction.errors.txt

@@ -12,7 +12,7 @@ tests/cases/compiler/awaitInNonAsyncFunction.ts(30,9): error TS1103: A 'for-awai
 tests/cases/compiler/awaitInNonAsyncFunction.ts(31,5): error TS1308: 'await' expressions are only allowed within async functions and at the top levels of modules.
 tests/cases/compiler/awaitInNonAsyncFunction.ts(34,7): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
 tests/cases/compiler/awaitInNonAsyncFunction.ts(35,5): error TS1308: 'await' expressions are only allowed within async functions and at the top levels of modules.
-tests/cases/compiler/awaitInNonAsyncFunction.ts(39,5): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
+tests/cases/compiler/awaitInNonAsyncFunction.ts(39,5): error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
 tests/cases/compiler/awaitInNonAsyncFunction.ts(40,1): error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
 
 
@@ -97,7 +97,7 @@ tests/cases/compiler/awaitInNonAsyncFunction.ts(40,1): error TS1378: Top-level '
 
     for await (const _ of []);
         ~~~~~
-!!! error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
+!!! error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
     await null;
     ~~~~~
 !!! error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.

tests/baselines/reference/parser.forAwait.es2018.errors.txt

@@ -7,24 +7,30 @@ tests/cases/conformance/parser/ecmascript2018/forAwait/inFunctionDeclWithDeclIsE
 tests/cases/conformance/parser/ecmascript2018/forAwait/inFunctionDeclWithExprIsError.ts(3,9): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
 tests/cases/conformance/parser/ecmascript2018/forAwait/inGeneratorWithDeclIsError.ts(3,9): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
 tests/cases/conformance/parser/ecmascript2018/forAwait/inGeneratorWithExprIsError.ts(3,9): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
-tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithDeclIsError.ts(1,5): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
+tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithDeclIsError.ts(1,5): error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
+tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithDeclIsError.ts(1,5): error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
 tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithDeclIsError.ts(1,23): error TS2304: Cannot find name 'y'.
-tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts(1,5): error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
+tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts(1,5): error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
+tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts(1,5): error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
 tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts(1,12): error TS2304: Cannot find name 'x'.
 tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts(1,17): error TS2304: Cannot find name 'y'.
 
 
-==== tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithDeclIsError.ts (2 errors) ====
+==== tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithDeclIsError.ts (3 errors) ====
     for await (const x of y) {
         ~~~~~
-!!! error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
+!!! error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
+        ~~~~~
+!!! error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
                           ~
 !!! error TS2304: Cannot find name 'y'.
     }
-==== tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts (3 errors) ====
+==== tests/cases/conformance/parser/ecmascript2018/forAwait/topLevelWithExprIsError.ts (4 errors) ====
     for await (x of y) {
         ~~~~~
-!!! error TS1103: A 'for-await-of' statement is only allowed within an async function or async generator.
+!!! error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
+        ~~~~~
+!!! error TS1378: Top-level 'await' expressions are only allowed when the 'module' option is set to 'esnext' or 'system', and the 'target' option is set to 'es2017' or higher.
                ~
 !!! error TS2304: Cannot find name 'x'.
                     ~

tests/baselines/reference/topLevelAwaitNonModule.errors.txt

@@ -1,11 +1,20 @@
 tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts(1,1): error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
 tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts(1,7): error TS2304: Cannot find name 'x'.
+tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts(5,5): error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
 
 
-==== tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts (2 errors) ====
+==== tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts (3 errors) ====
     await x;
     ~~~~~
 !!! error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
           ~
 !!! error TS2304: Cannot find name 'x'.
+    
+    const arr = [Promise.resolve()];
+    
+    for await (const item of arr) {
+        ~~~~~
+!!! error TS1375: 'await' expressions are only allowed at the top level of a file when that file is a module, but this file has no imports or exports. Consider adding an empty 'export {}' to make this file a module.
+      item;
+    }
 

tests/baselines/reference/topLevelAwaitNonModule.js

@@ -1,6 +1,16 @@
 //// [topLevelAwaitNonModule.ts]
 await x;
+
+const arr = [Promise.resolve()];
+
+for await (const item of arr) {
+  item;
+}
 
 
 //// [topLevelAwaitNonModule.js]
 await x;
+const arr = [Promise.resolve()];
+for await (const item of arr) {
+    item;
+}

tests/baselines/reference/topLevelAwaitNonModule.symbols

@@ -1,4 +1,17 @@
 === tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts ===
 await x;
-No type information for this code.
-No type information for this code.
+
+const arr = [Promise.resolve()];
+>arr : Symbol(arr, Decl(topLevelAwaitNonModule.ts, 2, 5))
+>Promise.resolve : Symbol(PromiseConstructor.resolve, Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
+>Promise : Symbol(Promise, Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2018.promise.d.ts, --, --))
+>resolve : Symbol(PromiseConstructor.resolve, Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --))
+
+for await (const item of arr) {
+>item : Symbol(item, Decl(topLevelAwaitNonModule.ts, 4, 16))
+>arr : Symbol(arr, Decl(topLevelAwaitNonModule.ts, 2, 5))
+
+  item;
+>item : Symbol(item, Decl(topLevelAwaitNonModule.ts, 4, 16))
+}
+

tests/baselines/reference/topLevelAwaitNonModule.types

@@ -3,3 +3,19 @@ await x;
 >await x : any
 >x : any
 
+const arr = [Promise.resolve()];
+>arr : Promise<void>[]
+>[Promise.resolve()] : Promise<void>[]
+>Promise.resolve() : Promise<void>
+>Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
+>Promise : PromiseConstructor
+>resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
+
+for await (const item of arr) {
+>item : void
+>arr : Promise<void>[]
+
+  item;
+>item : void
+}
+

tests/cases/conformance/externalModules/topLevelAwaitNonModule.ts

@@ -1,3 +1,9 @@
 // @target: esnext
 // @module: esnext
 await x;
+
+const arr = [Promise.resolve()];
+
+for await (const item of arr) {
+  item;
+}