Update existing tests

tests/baselines/reference/api/typescript.d.ts

@@ -6006,19 +6006,67 @@ declare namespace ts {
         isSourceFileFromExternalLibrary(file: SourceFile): boolean;
         isSourceFileDefaultLibrary(file: SourceFile): boolean;
         /**
-         * Calculates the final resolution mode for a given module reference node. This is the resolution mode explicitly provided via import
-         * attributes, if present, or the syntax the usage would have if emitted to JavaScript. In `--module node16` or `nodenext`, this may
-         * depend on the file's `impliedNodeFormat`. In `--module preserve`, it depends only on the input syntax of the reference. In other
-         * `module` modes, when overriding import attributes are not provided, this function returns `undefined`, as the result would have no
-         * impact on module resolution, emit, or type checking.
+         * Calculates the final resolution mode for a given module reference node. This function only returns a result when module resolution
+         * settings allow differing resolution between ESM imports and CJS requires, or when a mode is explicitly provided via import attributes,
+         * which cause an `import` or `require` condition to be used during resolution regardless of module resolution settings. In absence of
+         * overriding attributes, and in modes that support differing resolution, the result indicates the syntax the usage would emit to JavaScript.
+         * Some examples:
+         *
+         * ```ts
+         * // tsc foo.mts --module nodenext
+         * import {} from "mod";
+         * // Result: ESNext - the import emits as ESM due to `impliedNodeFormat` set by .mts file extension
+         *
+         * // tsc foo.cts --module nodenext
+         * import {} from "mod";
+         * // Result: CommonJS - the import emits as CJS due to `impliedNodeFormat` set by .cts file extension
+         *
+         * // tsc foo.ts --module preserve --moduleResolution bundler
+         * import {} from "mod";
+         * // Result: ESNext - the import emits as ESM due to `--module preserve` and `--moduleResolution bundler`
+         * // supports conditional imports/exports
+         *
+         * // tsc foo.ts --module preserve --moduleResolution node10
+         * import {} from "mod";
+         * // Result: undefined - the import emits as ESM due to `--module preserve`, but `--moduleResolution node10`
+         * // does not support conditional imports/exports
+         *
+         * // tsc foo.ts --module commonjs --moduleResolution node10
+         * import type {} from "mod" with { "resolution-mode": "import" };
+         * // Result: ESNext - conditional imports/exports always supported with "resolution-mode" attribute
+         * ```
          */
         getModeForUsageLocation(file: SourceFile, usage: StringLiteralLike): ResolutionMode;
         /**
-         * Calculates the final resolution mode for an import at some index within a file's `imports` list. This is the resolution mode
-         * explicitly provided via import attributes, if present, or the syntax the usage would have if emitted to JavaScript. In
-         * `--module node16` or `nodenext`, this may depend on the file's `impliedNodeFormat`. In `--module preserve`, it depends only on the
-         * input syntax of the reference. In other `module` modes, when overriding import attributes are not provided, this function returns
-         * `undefined`, as the result would have no impact on module resolution, emit, or type checking.
+         * Calculates the final resolution mode for an import at some index within a file's `imports` list. This function only returns a result
+         * when module resolution settings allow differing resolution between ESM imports and CJS requires, or when a mode is explicitly provided
+         * via import attributes, which cause an `import` or `require` condition to be used during resolution regardless of module resolution
+         * settings. In absence of overriding attributes, and in modes that support differing resolution, the result indicates the syntax the
+         * usage would emit to JavaScript. Some examples:
+         *
+         * ```ts
+         * // tsc foo.mts --module nodenext
+         * import {} from "mod";
+         * // Result: ESNext - the import emits as ESM due to `impliedNodeFormat` set by .mts file extension
+         *
+         * // tsc foo.cts --module nodenext
+         * import {} from "mod";
+         * // Result: CommonJS - the import emits as CJS due to `impliedNodeFormat` set by .cts file extension
+         *
+         * // tsc foo.ts --module preserve --moduleResolution bundler
+         * import {} from "mod";
+         * // Result: ESNext - the import emits as ESM due to `--module preserve` and `--moduleResolution bundler`
+         * // supports conditional imports/exports
+         *
+         * // tsc foo.ts --module preserve --moduleResolution node10
+         * import {} from "mod";
+         * // Result: undefined - the import emits as ESM due to `--module preserve`, but `--moduleResolution node10`
+         * // does not support conditional imports/exports
+         *
+         * // tsc foo.ts --module commonjs --moduleResolution node10
+         * import type {} from "mod" with { "resolution-mode": "import" };
+         * // Result: ESNext - conditional imports/exports always supported with "resolution-mode" attribute
+         * ```
          */
         getModeForResolutionAtIndex(file: SourceFile, index: number): ResolutionMode;
         getProjectReferences(): readonly ProjectReference[] | undefined;
@@ -9366,24 +9414,43 @@ declare namespace ts {
     function getModeForResolutionAtIndex(file: SourceFile, index: number, compilerOptions: CompilerOptions): ResolutionMode;
     /**
      * Use `program.getModeForUsageLocation`, which retrieves the correct `compilerOptions`, instead of this function whenever possible.
-     * Calculates the final resolution mode for a given module reference node. This is the resolution mode explicitly provided via import
-     * attributes, if present, or the syntax the usage would have if emitted to JavaScript. In `--module node16` or `nodenext`, this may
-     * depend on the file's `impliedNodeFormat`. In `--module preserve`, it depends only on the input syntax of the reference. In other
-     * `module` modes, when overriding import attributes are not provided, this function returns `undefined`, as the result would have no
-     * impact on module resolution, emit, or type checking.
+     * Calculates the final resolution mode for a given module reference node. This function only returns a result when module resolution
+     * settings allow differing resolution between ESM imports and CJS requires, or when a mode is explicitly provided via import attributes,
+     * which cause an `import` or `require` condition to be used during resolution regardless of module resolution settings. In absence of
+     * overriding attributes, and in modes that support differing resolution, the result indicates the syntax the usage would emit to JavaScript.
+     * Some examples:
+     *
+     * ```ts
+     * // tsc foo.mts --module nodenext
+     * import {} from "mod";
+     * // Result: ESNext - the import emits as ESM due to `impliedNodeFormat` set by .mts file extension
+     *
+     * // tsc foo.cts --module nodenext
+     * import {} from "mod";
+     * // Result: CommonJS - the import emits as CJS due to `impliedNodeFormat` set by .cts file extension
+     *
+     * // tsc foo.ts --module preserve --moduleResolution bundler
+     * import {} from "mod";
+     * // Result: ESNext - the import emits as ESM due to `--module preserve` and `--moduleResolution bundler`
+     * // supports conditional imports/exports
+     *
+     * // tsc foo.ts --module preserve --moduleResolution node10
+     * import {} from "mod";
+     * // Result: undefined - the import emits as ESM due to `--module preserve`, but `--moduleResolution node10`
+     * // does not support conditional imports/exports
+     *
+     * // tsc foo.ts --module commonjs --moduleResolution node10
+     * import type {} from "mod" with { "resolution-mode": "import" };
+     * // Result: ESNext - conditional imports/exports always supported with "resolution-mode" attribute
+     * ```
+     *
      * @param file The file the import or import-like reference is contained within
      * @param usage The module reference string
      * @param compilerOptions The compiler options for the program that owns the file. If the file belongs to a referenced project, the compiler options
      * should be the options of the referenced project, not the referencing project.
      * @returns The final resolution mode of the import
      */
-    function getModeForUsageLocation(
-        file: {
-            impliedNodeFormat?: ResolutionMode;
-        },
-        usage: StringLiteralLike,
-        compilerOptions: CompilerOptions,
-    ): ModuleKind.CommonJS | ModuleKind.ESNext | undefined;
+    function getModeForUsageLocation(file: SourceFile, usage: StringLiteralLike, compilerOptions: CompilerOptions): ResolutionMode;
     function getConfigFileParsingDiagnostics(configFileParseResult: ParsedCommandLine): readonly Diagnostic[];
     /**
      * A function for determining if a given file is esm or cjs format, assuming modern node module resolution rules, as configured by the

tests/baselines/reference/bundlerImportESM(module=esnext).js

@@ -16,6 +16,8 @@ import { esm } from "./esm.mjs";
 //// [esm.mjs]
 export var esm = 0;
 //// [not-actually-cjs.cjs]
-export {};
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [still-not-cjs.js]
-export {};
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });

tests/baselines/reference/bundlerNodeModules1(module=esnext).errors.txt

@@ -4,7 +4,7 @@ error TS6504: File '/node_modules/dual/index.cjs' is a JavaScript file. Did you
 error TS6504: File '/node_modules/dual/index.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
   The file is in the program because:
     Root file specified for compilation
-/main.cts(1,15): error TS2305: Module '"dual"' has no exported member 'cjs'.
+/main.cts(1,10): error TS2305: Module '"dual"' has no exported member 'esm'.
 /main.mts(1,15): error TS2305: Module '"dual"' has no exported member 'cjs'.
 /main.ts(1,15): error TS2305: Module '"dual"' has no exported member 'cjs'.
 
@@ -54,6 +54,6 @@ error TS6504: File '/node_modules/dual/index.js' is a JavaScript file. Did you m
 
 ==== /main.cts (1 errors) ====
     import { esm, cjs } from "dual";
-                  ~~~
-!!! error TS2305: Module '"dual"' has no exported member 'cjs'.
+             ~~~
+!!! error TS2305: Module '"dual"' has no exported member 'esm'.
 

tests/baselines/reference/bundlerNodeModules1(module=esnext).js

@@ -42,4 +42,5 @@ export {};
 //// [main.mjs]
 export {};
 //// [main.cjs]
-export {};
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });

tests/baselines/reference/bundlerNodeModules1(module=esnext).types

@@ -20,6 +20,6 @@ import { esm, cjs } from "dual";
 
 === /main.cts ===
 import { esm, cjs } from "dual";
->esm : number
->cjs : any
+>esm : any
+>cjs : number
 

tests/baselines/reference/bundlerNodeModules1(module=preserve).errors.txt

@@ -4,7 +4,7 @@ error TS6504: File '/node_modules/dual/index.cjs' is a JavaScript file. Did you
 error TS6504: File '/node_modules/dual/index.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
   The file is in the program because:
     Root file specified for compilation
-/main.cts(1,15): error TS2305: Module '"dual"' has no exported member 'cjs'.
+/main.cts(1,10): error TS2305: Module '"dual"' has no exported member 'esm'.
 /main.mts(1,15): error TS2305: Module '"dual"' has no exported member 'cjs'.
 /main.ts(1,15): error TS2305: Module '"dual"' has no exported member 'cjs'.
 
@@ -54,6 +54,6 @@ error TS6504: File '/node_modules/dual/index.js' is a JavaScript file. Did you m
 
 ==== /main.cts (1 errors) ====
     import { esm, cjs } from "dual";
-                  ~~~
-!!! error TS2305: Module '"dual"' has no exported member 'cjs'.
+             ~~~
+!!! error TS2305: Module '"dual"' has no exported member 'esm'.
 

tests/baselines/reference/bundlerNodeModules1(module=preserve).types

@@ -20,6 +20,6 @@ import { esm, cjs } from "dual";
 
 === /main.cts ===
 import { esm, cjs } from "dual";
->esm : number
->cjs : any
+>esm : any
+>cjs : number
 

tests/baselines/reference/customConditions(resolvepackagejsonexports=false).js

@@ -29,5 +29,3 @@ import _ from "lodash";
 
 
 //// [index.js]
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });

tests/baselines/reference/customConditions(resolvepackagejsonexports=true).js

@@ -29,5 +29,3 @@ import _ from "lodash";
 
 
 //// [index.js]
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });

tests/baselines/reference/legacyNodeModulesExportsSpecifierGenerationConditions.js

@@ -32,7 +32,6 @@ export interface Thing {} // not exported in export map, inaccessible under new
 }
 
 //// [index.js]
-"use strict";
 var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
     function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
     return new (P || (P = Promise))(function (resolve, reject) {
@@ -69,15 +68,12 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
         if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
     }
 };
-Object.defineProperty(exports, "__esModule", { value: true });
-exports.a = void 0;
-var a = function () { return __awaiter(void 0, void 0, void 0, function () { return __generator(this, function (_a) {
+export var a = function () { return __awaiter(void 0, void 0, void 0, function () { return __generator(this, function (_a) {
     switch (_a.label) {
-        case 0: return [4 /*yield*/, Promise.resolve().then(function () { return require("inner"); })];
+        case 0: return [4 /*yield*/, import("inner")];
         case 1: return [2 /*return*/, (_a.sent()).x()];
     }
 }); }); };
-exports.a = a;
 
 
 //// [index.d.ts]

tests/baselines/reference/moduleDetectionIsolatedModulesCjsFileScope.js

@@ -6,8 +6,9 @@ const a = 2;
 const a = 2;
 
 //// [filename.cjs]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 const a = 2;
-export {};
 //// [filename.mjs]
 const a = 2;
 export {};