test(e2e): adds test case for position:absolute containers

e2e/src/posa.e2e-spec.ts

@@ -0,0 +1,27 @@
+import {browser} from 'protractor';
+import {PosaPage} from './posa.po';
+
+describe('with position:absolute container', () => {
+  let page: PosaPage;
+
+  beforeEach(() => {
+    page = new PosaPage();
+    page.navigateToDev();
+  });
+
+
+  it('should recognize sticky ', async () => {
+    page.navigateToDev();
+    await browser.executeScript('window.scrollTo(0,501);');
+    const hasStickyClass = await hasClass(page.getStickyElement(), 'is-sticky');
+    expect(hasStickyClass).toBe(true);
+  });
+
+
+});
+
+// via https://stackoverflow.com/questions/20268128/how-to-test-if-an-element-has-class-using-protractor
+async function hasClass(element, cls) {
+  const classes = await element.getAttribute('class');
+  return classes.split(' ').indexOf(cls) !== -1;
+}

e2e/src/posa.po.ts

@@ -0,0 +1,25 @@
+import {browser, by, element} from 'protractor';
+
+export class PosaPage {
+
+
+  constructor() {
+    const width = 1200;
+    const height = 900;
+    browser.driver.manage().window().setSize(width, height);
+  }
+
+  navigateToDev() {
+    return browser.get('/posa');
+  }
+
+
+  getStickyElement() {
+    return element(by.css('.some-thing-sticky'));
+  }
+
+  getEnableButton() {
+    return element(by.css('#enable-btn'));
+  }
+}
+

src/app/app-routing.module.ts

@@ -3,10 +3,12 @@ import {RouterModule, Routes} from '@angular/router';
 
 import {HomeComponent} from './home/home.component';
 import {DevComponent} from './dev/dev.component';
+import {PosaContainerComponent} from './test-cases/posa-container/posa-container.component';
 
 const routes: Routes = [
   {path: '', component: HomeComponent},
-  {path: 'dev', component: DevComponent}
+  {path: 'dev', component: DevComponent},
+  {path: 'posa', component: PosaContainerComponent},
 ];
 
 @NgModule({

src/app/app.module.ts

@@ -7,13 +7,15 @@ import {DevComponent} from './dev/dev.component';
 import {HomeComponent} from './home/home.component';
 import {AppRoutingModule} from './app-routing.module';
 import {AngularStickyThingsModule} from '../../projects/angular-sticky-things/src/lib/angular-sticky-things.module';
+import {PosaContainerComponent} from './test-cases/posa-container/posa-container.component';
 
 @NgModule({
   declarations: [
     AppComponent,
     InfoComponent,
     DevComponent,
-    HomeComponent
+    HomeComponent,
+    PosaContainerComponent
   ],
   imports: [
     BrowserModule,

src/app/test-cases/posa-container/posa-container.component.html

@@ -0,0 +1,19 @@
+<p>
+  I'm special, since the containing div scrolls and not the body.
+</p>
+
+
+<div class="row">
+  <div class="col-6">
+    <div #spacer></div>
+    <div [spacer]="spacer" class="some-thing-sticky" stickyThing="">
+      Scroll by!
+    </div>
+  </div>
+</div>
+
+
+<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
+<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
+<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
+<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>

src/app/test-cases/posa-container/posa-container.component.scss

@@ -0,0 +1,18 @@
+:host {
+  display: block;
+  position: absolute;
+  left: 0;
+  right: 0;
+  top: 0;
+  bottom: 0;
+  height: 100%;
+  overflow: auto;
+  background-color: red;
+}
+
+
+.some-thing-sticky {
+  background-color: #fff;
+  padding: 15px;
+  color: #000;
+}

src/app/test-cases/posa-container/posa-container.component.spec.ts

@@ -0,0 +1,25 @@
+import {async, ComponentFixture, TestBed} from '@angular/core/testing';
+
+import {PosaContainerComponent} from './posa-container.component';
+
+describe('PosaContainerComponent', () => {
+  let component: PosaContainerComponent;
+  let fixture: ComponentFixture<PosaContainerComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [PosaContainerComponent]
+    })
+      .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(PosaContainerComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/test-cases/posa-container/posa-container.component.ts

@@ -0,0 +1,16 @@
+import {Component, OnInit} from '@angular/core';
+
+@Component({
+  selector: 'demo-posa-container',
+  templateUrl: './posa-container.component.html',
+  styleUrls: ['./posa-container.component.scss']
+})
+export class PosaContainerComponent implements OnInit {
+
+  constructor() {
+  }
+
+  ngOnInit() {
+  }
+
+}