Do not emit javascript files

sheetalkamat · sheetalkamat · commit 2860435a2eb3 · 2015-09-16T13:18:29.000-07:00
diff --git a/src/compiler/declarationEmitter.ts b/src/compiler/declarationEmitter.ts
@@ -104,7 +104,7 @@ namespace ts {
             // Emit references corresponding to this file
             let emittedReferencedFiles: SourceFile[] = [];
             forEach(host.getSourceFiles(), sourceFile => {
-                if (!isExternalModuleOrDeclarationFile(sourceFile)) {
+                if (!isExternalModuleOrDeclarationFile(sourceFile) && !isJavaScript(sourceFile.fileName)) {
                     // Check what references need to be added
                     if (!compilerOptions.noResolve) {
                         forEach(sourceFile.referencedFiles, fileReference => {
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
@@ -88,7 +88,9 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
                 let jsFilePath = getOwnEmitOutputFilePath(targetSourceFile, host, shouldEmitJsx(targetSourceFile) ? ".jsx" : ".js");
                 emitFile(jsFilePath, targetSourceFile);
             }
-            else if (!isDeclarationFile(targetSourceFile) && (compilerOptions.outFile || compilerOptions.out)) {
+            else if (!isDeclarationFile(targetSourceFile) &&
+                !isJavaScript(targetSourceFile.fileName) &&
+                (compilerOptions.outFile || compilerOptions.out)) {
                 emitFile(compilerOptions.outFile || compilerOptions.out);
             }
         }
@@ -199,7 +201,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
             }
             else {
                 forEach(host.getSourceFiles(), sourceFile => {
-                    if (!isExternalModuleOrDeclarationFile(sourceFile)) {
+                    if (!isJavaScript(sourceFile.fileName) && !isExternalModuleOrDeclarationFile(sourceFile)) {
                         emitSourceFile(sourceFile);
                     }
                 });
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
@@ -1778,7 +1778,7 @@ namespace ts {
     }
 
     export function shouldEmitToOwnFile(sourceFile: SourceFile, compilerOptions: CompilerOptions): boolean {
-        if (!isDeclarationFile(sourceFile)) {
+        if (!isDeclarationFile(sourceFile) && !isJavaScript(sourceFile.fileName)) {
             if ((isExternalModule(sourceFile) || !(compilerOptions.outFile || compilerOptions.out))) {
                 // 1. in-browser single file compilation scenario
                 // 2. non supported extension file
diff --git a/tests/baselines/reference/getEmitOutputWithDeclarationFile3.baseline b/tests/baselines/reference/getEmitOutputWithDeclarationFile3.baseline
@@ -2,5 +2,4 @@ EmitSkipped: false
 FileName : declSingle.js
 var x = "hello";
 var x1 = 1000;
-var x2 = 1000;
 
diff --git a/tests/baselines/reference/jsFileCompilationAmbientVarDeclarationSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationAmbientVarDeclarationSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,1): error TS8009: 'declare' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     declare var v;
     ~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationDecoratorSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationDecoratorSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,1): error TS8017: 'decorators' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     @internal class C { }
     ~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationEmitDeclarations.js b/tests/baselines/reference/jsFileCompilationEmitDeclarations.js
@@ -15,11 +15,8 @@ var c = (function () {
     }
     return c;
 })();
-function foo() {
-}
 
 
 //// [out.d.ts]
 declare class c {
 }
-declare function foo(): void;
diff --git a/tests/baselines/reference/jsFileCompilationEmitTrippleSlashReference.js b/tests/baselines/reference/jsFileCompilationEmitTrippleSlashReference.js
@@ -19,15 +19,8 @@ var c = (function () {
     }
     return c;
 })();
-function bar() {
-}
-/// <reference path="c.js"/>
-function foo() {
-}
 
 
 //// [out.d.ts]
 declare class c {
 }
-declare function bar(): void;
-declare function foo(): void;
diff --git a/tests/baselines/reference/jsFileCompilationEnumSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationEnumSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,6): error TS8015: 'enum declarations' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     enum E { }
          ~
diff --git a/tests/baselines/reference/jsFileCompilationExportAssignmentSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationExportAssignmentSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,1): error TS8003: 'export=' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     export = b;
     ~~~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationHeritageClauseSyntaxOfClass.errors.txt b/tests/baselines/reference/jsFileCompilationHeritageClauseSyntaxOfClass.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,9): error TS8005: 'implements clauses' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     class C implements D { }
             ~~~~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationImportEqualsSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationImportEqualsSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,1): error TS8002: 'import ... =' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     import a = b;
     ~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationInterfaceSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationInterfaceSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,11): error TS8006: 'interface declarations' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     interface I { }
               ~
diff --git a/tests/baselines/reference/jsFileCompilationModuleSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationModuleSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,8): error TS8007: 'module declarations' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     module M { }
            ~
diff --git a/tests/baselines/reference/jsFileCompilationOptionalParameter.errors.txt b/tests/baselines/reference/jsFileCompilationOptionalParameter.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,13): error TS8009: '?' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     function F(p?) { }
                 ~
diff --git a/tests/baselines/reference/jsFileCompilationPropertySyntaxOfClass.errors.txt b/tests/baselines/reference/jsFileCompilationPropertySyntaxOfClass.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,11): error TS8014: 'property declarations' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     class C { v }
               ~
diff --git a/tests/baselines/reference/jsFileCompilationPublicMethodSyntaxOfClass.errors.txt b/tests/baselines/reference/jsFileCompilationPublicMethodSyntaxOfClass.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(2,5): error TS8009: 'public' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     class C {
         public foo() {
diff --git a/tests/baselines/reference/jsFileCompilationPublicParameterModifier.errors.txt b/tests/baselines/reference/jsFileCompilationPublicParameterModifier.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,23): error TS8012: 'parameter modifiers' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     class C { constructor(public x) { }}
                           ~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationRestParameter.js b/tests/baselines/reference/jsFileCompilationRestParameter.js
@@ -2,4 +2,3 @@
 function foo(...a) { }
 
 //// [b.js]
-function foo(...a) { }
diff --git a/tests/baselines/reference/jsFileCompilationReturnTypeSyntaxOfFunction.errors.txt b/tests/baselines/reference/jsFileCompilationReturnTypeSyntaxOfFunction.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,15): error TS8010: 'types' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     function F(): number { }
                   ~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationSyntaxError.errors.txt b/tests/baselines/reference/jsFileCompilationSyntaxError.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(3,6): error TS1223: 'type' tag already specified.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     /**
       * @type {number}
diff --git a/tests/baselines/reference/jsFileCompilationTypeAliasSyntax.errors.txt b/tests/baselines/reference/jsFileCompilationTypeAliasSyntax.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,1): error TS8008: 'type aliases' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     type a = b;
     ~~~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationTypeArgumentSyntaxOfCall.errors.txt b/tests/baselines/reference/jsFileCompilationTypeArgumentSyntaxOfCall.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,5): error TS8011: 'type arguments' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     Foo<number>();
         ~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt b/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,10): error TS8016: 'type assertion expressions' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     var v = <string>undefined;
              ~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationTypeOfParameter.errors.txt b/tests/baselines/reference/jsFileCompilationTypeOfParameter.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,15): error TS8010: 'types' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     function F(a: number) { }
                   ~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationTypeParameterSyntaxOfClass.errors.txt b/tests/baselines/reference/jsFileCompilationTypeParameterSyntaxOfClass.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,9): error TS8004: 'type parameter declarations' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     class C<T> { }
             ~
diff --git a/tests/baselines/reference/jsFileCompilationTypeParameterSyntaxOfFunction.errors.txt b/tests/baselines/reference/jsFileCompilationTypeParameterSyntaxOfFunction.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,12): error TS8004: 'type parameter declarations' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     function F<T>() { }
                ~
diff --git a/tests/baselines/reference/jsFileCompilationTypeSyntaxOfVar.errors.txt b/tests/baselines/reference/jsFileCompilationTypeSyntaxOfVar.errors.txt
@@ -1,8 +1,6 @@
-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 tests/cases/compiler/a.js(1,8): error TS8010: 'types' can only be used in a .ts file.
 
 
-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.
 ==== tests/cases/compiler/a.js (1 errors) ====
     var v: () => number;
            ~~~~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationWithOut.js b/tests/baselines/reference/jsFileCompilationWithOut.js
@@ -15,5 +15,3 @@ var c = (function () {
     }
     return c;
 })();
-function foo() {
-}
diff --git a/tests/baselines/reference/jsFileCompilationWithoutOut.errors.txt b/tests/baselines/reference/jsFileCompilationWithoutOut.errors.txt
diff --git a/tests/baselines/reference/jsFileCompilationWithoutOut.symbols b/tests/baselines/reference/jsFileCompilationWithoutOut.symbols
@@ -0,0 +1,10 @@
+=== tests/cases/compiler/a.ts ===
+class c {
+>c : Symbol(c, Decl(a.ts, 0, 0))
+}
+
+=== tests/cases/compiler/b.js ===
+function foo() {
+>foo : Symbol(foo, Decl(b.js, 0, 0))
+}
+
diff --git a/tests/baselines/reference/jsFileCompilationWithoutOut.types b/tests/baselines/reference/jsFileCompilationWithoutOut.types
@@ -0,0 +1,10 @@
+=== tests/cases/compiler/a.ts ===
+class c {
+>c : c
+}
+
+=== tests/cases/compiler/b.js ===
+function foo() {
+>foo : () => void
+}
+
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/test.d.ts b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/test.d.ts
@@ -1,2 +1 @@
 declare var test: number;
-declare var test2: number;
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/test.js b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/test.js
@@ -1,2 +1 @@
 var test = 10;
-var test2 = 10; // Should get compiled
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/test.d.ts b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/test.d.ts
@@ -1,2 +1 @@
 declare var test: number;
-declare var test2: number;
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/test.js b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/test.js
@@ -1,2 +1 @@
 var test = 10;
-var test2 = 10; // Should get compiled
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/test.d.ts b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/test.d.ts
@@ -1,2 +1 @@
 declare var test: number;
-declare var test2: number;
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/test.js b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/test.js
@@ -1,2 +1 @@
 var test = 10;
-var test2 = 10; // Should get compiled
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/test.d.ts b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/test.d.ts
@@ -1,2 +1 @@
 declare var test: number;
-declare var test2: number;
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/test.js b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/test.js
@@ -1,2 +1 @@
 var test = 10;
-var test2 = 10; // Should get compiled

Original file line number	Diff line number	Diff line change
`@@ -88,7 +88,9 @@ var __awaiter = (this && this.__awaiter) \|\| function (thisArg, _arguments, Promi`
`88`	`88`	`let jsFilePath = getOwnEmitOutputFilePath(targetSourceFile, host, shouldEmitJsx(targetSourceFile) ? ".jsx" : ".js");`
`89`	`89`	`emitFile(jsFilePath, targetSourceFile);`
`90`	`90`	`}`
`91`		`- else if (!isDeclarationFile(targetSourceFile) && (compilerOptions.outFile \|\| compilerOptions.out)) {`
	`91`	`+ else if (!isDeclarationFile(targetSourceFile) &&`
	`92`	`+ !isJavaScript(targetSourceFile.fileName) &&`
	`93`	`+ (compilerOptions.outFile \|\| compilerOptions.out)) {`
`92`	`94`	`emitFile(compilerOptions.outFile \|\| compilerOptions.out);`
`93`	`95`	`}`
`94`	`96`	`}`
`@@ -199,7 +201,7 @@ var __awaiter = (this && this.__awaiter) \|\| function (thisArg, _arguments, Promi`
`199`	`201`	`}`
`200`	`202`	`else {`
`201`	`203`	`forEach(host.getSourceFiles(), sourceFile => {`
`202`		`- if (!isExternalModuleOrDeclarationFile(sourceFile)) {`
	`204`	`+ if (!isJavaScript(sourceFile.fileName) && !isExternalModuleOrDeclarationFile(sourceFile)) {`
`203`	`205`	`emitSourceFile(sourceFile);`
`204`	`206`	`}`
`205`	`207`	`});`
Original file line number	Diff line number	Diff line change
`@@ -1778,7 +1778,7 @@ namespace ts {`
`1778`	`1778`	`}`
`1779`	`1779`
`1780`	`1780`	`export function shouldEmitToOwnFile(sourceFile: SourceFile, compilerOptions: CompilerOptions): boolean {`
`1781`		`- if (!isDeclarationFile(sourceFile)) {`
	`1781`	`+ if (!isDeclarationFile(sourceFile) && !isJavaScript(sourceFile.fileName)) {`
`1782`	`1782`	`if ((isExternalModule(sourceFile) \|\| !(compilerOptions.outFile \|\| compilerOptions.out))) {`
`1783`	`1783`	`// 1. in-browser single file compilation scenario`
`1784`	`1784`	`// 2. non supported extension file`
Original file line number	Diff line number	Diff line change
`@@ -15,11 +15,8 @@ var c = (function () {`
`15`	`15`	`}`
`16`	`16`	`return c;`
`17`	`17`	`})();`
`18`		`-function foo() {`
`19`		`-}`
`20`	`18`
`21`	`19`
`22`	`20`	`//// [out.d.ts]`
`23`	`21`	`declare class c {`
`24`	`22`	`}`
`25`		`-declare function foo(): void;`
Original file line number	Diff line number	Diff line change
`@@ -19,15 +19,8 @@ var c = (function () {`
`19`	`19`	`}`
`20`	`20`	`return c;`
`21`	`21`	`})();`
`22`		`-function bar() {`
`23`		`-}`
`24`		`-/// <reference path="c.js"/>`
`25`		`-function foo() {`
`26`		`-}`
`27`	`22`
`28`	`23`
`29`	`24`	`//// [out.d.ts]`
`30`	`25`	`declare class c {`
`31`	`26`	`}`
`32`		`-declare function bar(): void;`
`33`		`-declare function foo(): void;`
Original file line number	Diff line number	Diff line change
`@@ -1,8 +1,6 @@`
`1`		`-error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.`
`2`	`1`	`tests/cases/compiler/a.js(1,6): error TS8015: 'enum declarations' can only be used in a .ts file.`
`3`	`2`
`4`	`3`
`5`		`-!!! error TS5054: Could not write file 'tests/cases/compiler/a.js' which is one of the input files.`
`6`	`4`	`==== tests/cases/compiler/a.js (1 errors) ====`
`7`	`5`	`enum E { }`
`8`	`6`	`~`