@Component({
  selector: "app-root",
  templateUrl: "app.component.html",
  styleUrls: ["app.component.css"],
  animations: [
    slideInAnimation,
    // animation triggers go here
  ],
})
export class AppComponent {
  @HostBinding("@.disabled")
  public animationsDisabled = false;
}

import {
  Component,
  EventEmitter,
  HostBinding,
  Input,
  Output,
} from "@angular/core";
import {
  animate,
  state,
  style,
  transition,
  trigger,
} from "@angular/animations";

@Component({
  selector: "my-popup",
  template: `
    Popup: {{ message }}
    ✖
  `,
  animations: [
    trigger("state", [
      state(
        "opened",
        style({ transform: "translateY(0%)" })
      ),
      state(
        "void, closed",
        style({ transform: "translateY(100%)", opacity: 0 })
      ),
      transition("* => *", animate("100ms ease-in")),
    ]),
  ],
  styles: [
    `
      :host {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        background: #009cff;
        height: 48px;
        padding: 16px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-top: 1px solid black;
        font-size: 24px;
      }

      button {
        border-radius: 50%;
      }
    `,
  ],
})
export class PopupComponent {
  @HostBinding("@state")
  state: "opened" | "closed" = "closed";

  @Input()
  get message(): string {
    return this._message;
  }
  set message(message: string) {
    this._message = message;
    this.state = "opened";
  }
  private _message = "";

  @Output()
  closed = new EventEmitter();
}

animations: [
    trigger('pageAnimations', [
      transition(':enter', [
        query('.hero, form', [
          style({opacity: 0, transform: 'translateY(-100px)'}),
          stagger(-30, [
            animate('500ms cubic-bezier(0.35, 0, 0.25, 1)', style({ opacity: 1, transform: 'none' }))
          ])
        ])
      ])
    ]),
  ]
})
export class HeroListPageComponent implements OnInit {
  @HostBinding('@pageAnimations')
  public animatePage = true;

  heroTotal = -1;
  get heroes() { return this._heroes; }
  private _heroes: Hero[] = [];

  ngOnInit() {
    this._heroes = HEROES;
  }

  updateCriteria(criteria: string) {
    criteria = criteria ? criteria.trim() : '';

    this._heroes = HEROES.filter(hero => hero.name.toLowerCase().includes(criteria.toLowerCase()));
    const newTotal = this.heroes.length;

    if (this.heroTotal !== newTotal) {
      this.heroTotal = newTotal;
    } else if (!criteria) {
      this.heroTotal = -1;
    }
  }
}

@Directive({
  selector: "[appHighlight]",
})
export class HighlightDirective {
  constructor(private el: ElementRef) {}

  @HostListener("mouseenter") onMouseEnter() {
    this.highlight("yellow");
  }

  @HostListener("mouseleave") onMouseLeave() {
    this.highlight("");
  }

  private highlight(color: string) {
    this.el.nativeElement.style.backgroundColor = color;
  }
}

import {
  Directive,
  ElementRef,
  HostListener,
  Input,
} from "@angular/core";

@Directive({
  selector: "[appHighlight]",
})
export class HighlightDirective {
  @Input("appHighlight") highlightColor = "";

  private el: HTMLElement;

  constructor(el: ElementRef) {
    this.el = el.nativeElement;
  }

  @HostListener("mouseenter") onMouseEnter() {
    this.highlight(this.highlightColor || "cyan");
  }

  @HostListener("mouseleave") onMouseLeave() {
    this.highlight("");
  }

  private highlight(color: string) {
    this.el.style.backgroundColor = color;
  }
}

@HostListener('mouseenter') onMouseEnter() {
  this.highlight('yellow');
}

@HostListener('mouseleave') onMouseLeave() {
  this.highlight('');
}

private highlight(color: string) {
  this.el.nativeElement.style.backgroundColor = color;
}

@HostListener('mouseenter') onMouseEnter() {
  this.highlight(this.highlightColor || this.defaultColor || 'red');
}

test("loads items eventually", async () => {
  // Click button
  fireEvent.click(getByText(node, "Load"));

  // Wait for page to update with query text
  const items = await findByText(node, /Item #[0-9]: /);
  expect(items).toHaveLength(10);
});

test("movie title appears", async () => {
  // element is initially not present...

  // wait for appearance inside an assertion
  await waitFor(() => {
    expect(getByText("the lion king")).toBeInTheDocument();
  });
});

const puppeteer = require("puppeteer");
const {
  getDocument,
  queries,
  waitFor,
} = require("pptr-testing-library");

const { getByTestId, getByLabelText } = queries;

const browser = await puppeteer.launch();
const page = await browser.newPage();

// Grab ElementHandle for document
const $document = await getDocument(page);
// Your favorite query methods are available
const $form = await getByTestId($document, "my-form");
// returned elements are Puppeteer ElementHandles too!
const $email = await getByLabelText($form, "Email");
// interact with puppeteer like usual
await $email.type("pptr@example.com");
// waiting works too!
await waitFor(() => getByText("Loading..."));

await fireEvent.click(getByText("Click me"));

const handler = jest.fn();

const {
  container: { firstChild: input },
} = render();

fireEvent.input(input, { target: { value: "a" } });

expect(handler).toHaveBeenCalledTimes(1);

const ref = createRef();
const spy = jest.fn();

render(
  h(elementType, {
    onDblClick: spy,
    ref,
  })
);

fireEvent["onDblClick"](ref.current);

expect(spy).toHaveBeenCalledTimes(1);

const { getByLabelText, queryAllByTestId } =
  render(Component);

// With options.
const { results } = render(YourComponent, {
  target: MyTarget,
  props: { myProp: "value" },
});

// Props only.
const { results } = render(YourComponent, {
  myProp: "value",
});

const cb = jest.fn();


function Counter() {
  useEffect(cb);


  const [count, setCount] = useState(0);


  return  setCount(count + 1)}>{count};
}


const { container: { firstChild: buttonNode }, } = render();


// Clear the first call to useEffect that the initial render triggers.
cb.mockClear();


// Fire event Option 1.
fireEvent.click(buttonNode);


// Fire event Option 2.
fireEvent(
buttonNode,
new Event('MouseEvent', {
  bubbles: true,
  cancelable: true,
  button: 0,
});


expect(buttonNode).toHaveTextContent('1');
expect(cb).toHaveBeenCalledTimes(1);

const table = document.createElement("table");

const { container } = render(TableBody, {
  props,
  container: document.body.appendChild(table),
});

const { getByDataCy } = render();

expect(getByDataCy("my-component")).toHaveTextContent(
  "Hello"
);

test("has correct welcome text", () => {
  render();
  expect(screen.getByRole("heading")).toHaveTextContent(
    "Welcome, John Doe"
  );
});

render();

test("handles click correctly", () => {
  render();

  userEvent.click(screen.getByText("Check"));
  expect(screen.getByLabelText("Check")).toBeChecked();
});

// Example, a function to traverse table contents
import * as tableQueries from "my-table-query-library";
import { queries } from "@testing-library/react";

const { getByRowColumn, getByText } = render(, {
  queries: { ...queries, ...tableQueries },
});

test("has correct input value", () => {
  render();
  expect(screen.getByRole("form")).toHaveFormValues({
    firstName: "John",
    lastName: "Doe",
  });
});

const table = document.createElement("table");

const { container } = render(, {
  container: document.body.appendChild(table),
});

// @testing-library/react
const { container } = render();
const foo = container.querySelector('[data-foo="bar"]');

const { getByLabelText, queryAllByTestId } = render(
  
);

test("movie title goes away", async () => {
  // element is initially present...
  // note use of queryBy instead of getBy to return null
  // instead of throwing in the query itself
  await waitFor(() => {
    expect(queryByText("i, robot")).not.toBeInTheDocument();
  });
});

expect(queryByText("submit")).toBeNull();

// or, if using jest-dom:
import "@testing-library/jest-dom";
expect(queryByText("submit")).not.toBeInTheDocument();

test("movie title no longer present in DOM", async () => {
  // element is removed
  await waitForElementToBeRemoved(() =>
    queryByText("the mummy")
  );
});