Fixed es2015 imports from export=

(cherry picked from commit 9e46c180b4)

src/compiler/checker.ts

@@ -964,8 +964,16 @@ namespace ts {
             if (targetSymbol) {
                 const name = specifier.propertyName || specifier.name;
                 if (name.text) {
+                    let symbolFromVariable: Symbol;
+                    // First check if module was specified with "export=". If so, get the member from the resolved type
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                        const members = (getTypeOfSymbol(targetSymbol) as ResolvedType).members;
+                        symbolFromVariable = members && members[name.text];
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name.text);
+                    }
                     const symbolFromModule = getExportOfModule(targetSymbol, name.text);
-                    const symbolFromVariable = getPropertyOfVariable(targetSymbol, name.text);
                     const symbol = symbolFromModule && symbolFromVariable ?
                         combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
                         symbolFromModule || symbolFromVariable;

tests/cases/fourslash/javascriptModules20.ts

@@ -0,0 +1,13 @@
+/// <reference path='fourslash.ts'/>
+// @allowJs: true
+
+// @Filename: mod.js
+//// function foo() { return {a: true}; }
+//// module.exports = foo();
+
+// @Filename: app.js
+//// import * as mod from "./mod"
+//// mod./**/
+
+goTo.marker();
+verify.completionListContains('a');

tests/cases/fourslash/javascriptModules21.ts

@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts'/>
+// @allowJs: true
+// @module: system
+
+// @Filename: mod.js
+//// function foo() { return {a: true}; }
+//// module.exports = foo();
+
+// @Filename: app.js
+//// import mod from "./mod"
+//// mod./**/
+
+goTo.marker();
+verify.completionListContains('a');

tests/cases/fourslash/javascriptModules22.ts

@@ -0,0 +1,13 @@
+/// <reference path='fourslash.ts'/>
+// @allowJs: true
+
+// @Filename: mod.js
+//// function foo() { return {a: "hello, world"}; }
+//// module.exports = foo();
+
+// @Filename: app.js
+//// import {a} from "./mod"
+//// a./**/
+
+goTo.marker();
+verify.completionListContains('toString');

tests/cases/fourslash/javascriptModules23.ts

@@ -0,0 +1,12 @@
+/// <reference path='fourslash.ts'/>
+
+// @Filename: mod.ts
+//// var foo = {a: "test"};
+//// export = foo;
+
+// @Filename: app.ts
+//// import {a} from "./mod"
+//// a./**/
+
+goTo.marker();
+verify.completionListContains('toString');

tests/cases/fourslash/javascriptModules24.ts

@@ -0,0 +1,21 @@
+/// <reference path='fourslash.ts'/>
+
+// @Filename: mod.ts
+//// function foo() { return 42; }
+//// namespace foo {
+////   export function bar (a: string) { return a; }
+//// }
+//// export = foo;
+
+// @Filename: app.ts
+//// import * as foo from "./mod"
+//// foo/*1*/();
+//// foo.bar(/*2*/"test");
+
+goTo.marker('1');
+
+/**** BUG: Should be an error to invoke a call signature on a namespace import ****/
+//verify.errorExistsBeforeMarker('1');
+verify.quickInfoIs("(alias) foo(): number\nimport foo");
+goTo.marker('2');
+verify.signatureHelpArgumentCountIs(1);