Support UMD when targeted module uses export =

src/compiler/checker.ts

@@ -982,7 +982,13 @@ namespace ts {
         }
 
         function getTargetOfGlobalModuleExportDeclaration(node: GlobalModuleExportDeclaration): Symbol {
-            return node.parent.symbol;
+            const moduleSymbol = node.parent.symbol;
+            if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                return moduleSymbol.exports["export="].exportSymbol;
+            }
+            else {
+                return moduleSymbol;
+            }
         }
 
         function getTargetOfExportSpecifier(node: ExportSpecifier): Symbol {

tests/baselines/reference/umd6.js

@@ -0,0 +1,18 @@
+//// [tests/cases/conformance/externalModules/umd6.ts] ////
+
+//// [foo.d.ts]
+
+declare namespace Thing {
+	export function fn(): number;
+}
+export = Thing;
+export as namespace Foo;
+
+//// [a.ts]
+/// <reference path="foo.d.ts" />
+let y: number = Foo.fn();
+
+
+//// [a.js]
+/// <reference path="foo.d.ts" />
+var y = exports.Foo.fn();

tests/baselines/reference/umd6.symbols

@@ -0,0 +1,19 @@
+=== tests/cases/conformance/externalModules/a.ts ===
+/// <reference path="foo.d.ts" />
+let y: number = Foo.fn();
+>y : Symbol(y, Decl(a.ts, 1, 3))
+>Foo : Symbol(Foo, Decl(foo.d.ts, 4, 15))
+
+=== tests/cases/conformance/externalModules/foo.d.ts ===
+
+declare namespace Thing {
+>Thing : Symbol(Thing, Decl(foo.d.ts, 0, 0))
+
+	export function fn(): number;
+>fn : Symbol(fn, Decl(foo.d.ts, 1, 25))
+}
+export = Thing;
+>Thing : Symbol(Thing, Decl(foo.d.ts, 0, 0))
+
+export as namespace Foo;
+

tests/baselines/reference/umd6.types

@@ -0,0 +1,23 @@
+=== tests/cases/conformance/externalModules/a.ts ===
+/// <reference path="foo.d.ts" />
+let y: number = Foo.fn();
+>y : number
+>Foo.fn() : any
+>Foo.fn : any
+>Foo : any
+>fn : any
+
+=== tests/cases/conformance/externalModules/foo.d.ts ===
+
+declare namespace Thing {
+>Thing : typeof Thing
+
+	export function fn(): number;
+>fn : () => number
+}
+export = Thing;
+>Thing : typeof Thing
+
+export as namespace Foo;
+>Foo : any
+

tests/cases/conformance/externalModules/umd6.ts

@@ -0,0 +1,13 @@
+// @module: commonjs
+// @noImplicitReferences: true
+
+// @filename: foo.d.ts
+declare namespace Thing {
+	export function fn(): number;
+}
+export = Thing;
+export as namespace Foo;
+
+// @filename: a.ts
+/// <reference path="foo.d.ts" />
+let y: number = Foo.fn();