fix tests

Author: mmalerba

src/lib/sidenav/sidenav.spec.ts

@@ -2,7 +2,8 @@ import {fakeAsync, async, tick, ComponentFixture, TestBed} from '@angular/core/t
 import {Component} from '@angular/core';
 import {By} from '@angular/platform-browser';
 import {MdSidenav, MdSidenavModule, MdSidenavToggleResult} from './sidenav';
-import {A11yModule} from "../core/a11y/index";
+import {A11yModule} from '../core/a11y/index';
+import {PlatformModule} from '../core/platform/platform';
 
 
 function endSidenavTransition(fixture: ComponentFixture<any>) {
@@ -16,10 +17,9 @@ function endSidenavTransition(fixture: ComponentFixture<any>) {
 
 
 describe('MdSidenav', () => {
-
   beforeEach(async(() => {
     TestBed.configureTestingModule({
-      imports: [MdSidenavModule.forRoot(), A11yModule.forRoot()],
+      imports: [MdSidenavModule.forRoot(), A11yModule.forRoot(), PlatformModule.forRoot()],
       declarations: [
         BasicTestApp,
         SidenavLayoutTwoSidenavTestApp,

src/lib/sidenav/sidenav.ts

@@ -21,14 +21,6 @@ import {A11yModule} from '../core/a11y/index';
 import {FocusTrap} from '../core/a11y/focus-trap';
 
 
-/** Exception thrown when two MdSidenav are matching the same side. */
-export class MdDuplicatedSidenavError extends MdError {
-  constructor(align: string) {
-    super(`A sidenav was already declared for 'align="${align}"'`);
-  }
-}
-
-
 /** Sidenav toggle promise result. */
 export class MdSidenavToggleResult {
   constructor(public type: 'open' | 'close', public animationFinished: boolean) {}