fix: #410 - sourceFile.getExportedDeclarations() throws exception i…

…f file is empty
dsherret · Aug 27, 2018 · 8d563ac · 8d563ac
1 parent 888cdc2
commit 8d563ac
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/src/compiler/file/SourceFile.ts b/src/compiler/file/SourceFile.ts
@@ -639,7 +639,8 @@ export class SourceFile extends SourceFileBase<ts.SourceFile> {
      * Gets the export symbols of the source file.
      */
     getExportSymbols(): Symbol[] {
-        return this.context.typeChecker.getExportsOfModule(this.getSymbolOrThrow());
+        const symbol = this.getSymbol();
+        return symbol == null ? [] : this.context.typeChecker.getExportsOfModule(symbol);
     }
 
     /**

diff --git a/src/tests/compiler/file/sourceFileTests.ts b/src/tests/compiler/file/sourceFileTests.ts
@@ -721,6 +721,12 @@ describe(nameof(SourceFile), () => {
             expect(mainSourceFile.getExportedDeclarations().map(d => (d as any).getName()).sort())
                 .to.deep.equal(["MainFileClass"].sort());
         });
+
+        it("should not error for an empty file", () => {
+            const project = new Project({ useVirtualFileSystem: true });
+            const mainSourceFile = project.createSourceFile("main.ts", "");
+            expect(mainSourceFile.getExportedDeclarations().length).to.equal(0);
+        });
     });
 
     describe(nameof<SourceFile>(n => n.insertExportAssignments), () => {