rive-react/test/useRive.test.tsx

import { renderHook, act } from '@testing-library/react-hooks';
import { mocked } from 'ts-jest/utils';

import useRive from '../src/hooks/useRive';
import * as rive from 'rive-js';

jest.mock('rive-js', () => ({
  Rive: jest.fn().mockImplementation(() => ({
    on: jest.fn(),
    stop: jest.fn(),
  })),
  Layout: jest.fn(),
  Fit: {
    Cover: 'cover',
  },
  Alignment: {
    Center: 'center',
  },
  EventType: {
    Load: 'load',
  },
  StateMachineInputType: {
    Number: 1,
    Boolean: 2,
    Trigger: 3,
  },
}));

describe('useRive', () => {
  it('returns rive as null if no params are passed', () => {
    const { result } = renderHook(() => useRive());
    expect(result.current.rive).toBe(null);
    expect(result.current.canvas).toBe(null);
  });

  it('returns a rive object if the src object is set on the rive params and setCanvas is called', async () => {
    const params = {
      src: 'file-src',
    };

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: jest.fn(),
      stopRendering: jest.fn(),
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');
    const { result } = renderHook(() => useRive(params));

    await act(async () => {
      result.current.setCanvasRef(canvasSpy);
    });

    expect(result.current.rive).toBe(riveMock);
    expect(result.current.canvas).toBe(canvasSpy);
  });

  it('updates the bounds if the container ref is set', async () => {
    const params = {
      src: 'file-src',
    };

    const resizeToCanvasMock = jest.fn();

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: jest.fn(),
      stopRendering: jest.fn(),
      resizeToCanvas: resizeToCanvasMock,
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');
    const containerSpy = document.createElement('div');
    const { result } = renderHook(() => useRive(params));

    await act(async () => {
      result.current.setCanvasRef(canvasSpy);
      result.current.setContainerRef(containerSpy);
    });

    expect(result.current.rive).toBe(riveMock);
    expect(result.current.canvas).toBe(canvasSpy);

    expect(resizeToCanvasMock).toBeCalled();
  });

  it('stops the rive object on unmount', async () => {
    const params = {
      src: 'file-src',
    };

    const stopMock = jest.fn();

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: stopMock,
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');
    const { result, unmount } = renderHook(() => useRive(params));

    await act(async () => {
      result.current.setCanvasRef(canvasSpy);
    });

    unmount();

    expect(stopMock).toBeCalled();
  });

  it('sets the a bounds with the devicePixelRatio by default', async () => {
    const params = {
      src: 'file-src',
    };

    global.devicePixelRatio = 2;

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: jest.fn(),
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');
    const containerSpy = document.createElement('div');
    containerSpy.getBoundingClientRect = jest.fn().mockImplementation(() => ({
      width: 100,
      height: 100,
    }));

    const { result } = renderHook(() => useRive(params));

    await act(async () => {
      result.current.setCanvasRef(canvasSpy);
      result.current.setContainerRef(containerSpy);
    });

    // Height and width should be 2* the width and height returned from containers
    // bounding rect
    expect(canvasSpy).toHaveAttribute('height', '200');
    expect(canvasSpy).toHaveAttribute('width', '200');

    // Style height and width should be the same as returned from containers
    // bounding rect
    expect(canvasSpy).toHaveAttribute('style', 'width: 100px; height: 100px;');
  });

  it('sets the a bounds without the devicePixelRatio if useDevicePixelRatio is false', async () => {
    const params = {
      src: 'file-src',
    };
    const opts = {
      useDevicePixelRatio: false,
    };

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: jest.fn(),
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');
    const containerSpy = document.createElement('div');
    containerSpy.getBoundingClientRect = jest.fn().mockImplementation(() => ({
      width: 100,
      height: 100,
    }));

    const { result } = renderHook(() => useRive(params, opts));

    await act(async () => {
      result.current.setCanvasRef(canvasSpy);
      result.current.setContainerRef(containerSpy);
    });

    // Height and width should be same as containers bounding rect
    expect(canvasSpy).toHaveAttribute('height', '100');
    expect(canvasSpy).toHaveAttribute('width', '100');
  });

  it('uses artbound height to set bounds if fitCanvasToArtboardHeight is true', async () => {
    const params = {
      src: 'file-src',
    };
    const opts = {
      useDevicePixelRatio: false,
      fitCanvasToArtboardHeight: true,
    };

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: jest.fn(),
      bounds: {
        maxX: 100,
        maxY: 50,
      },
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');
    const containerSpy = document.createElement('div');
    containerSpy.getBoundingClientRect = jest.fn().mockImplementation(() => ({
      width: 100,
      height: 100,
    }));

    const { result } = renderHook(() => useRive(params, opts));

    await act(async () => {
      result.current.setContainerRef(containerSpy);
      result.current.setCanvasRef(canvasSpy);
    });

    // Height and width should be same as containers bounding rect
    expect(canvasSpy).toHaveAttribute('height', '50');
    expect(canvasSpy).toHaveAttribute('width', '100');

    // Container should have style set to height
    expect(containerSpy).toHaveAttribute('style', 'height: 50px;');
  });

  it('configures a IntersectionObserver on mounting', async () => {
    const params = {
      src: 'file-src',
    };

    const observeMock = jest.fn();

    global.IntersectionObserver = jest.fn().mockImplementation(() => ({
      observe: observeMock,
    }));

    const riveMock = {
      on: (_: string, cb: () => void) => cb(),
      stop: jest.fn(),
      bounds: {
        maxX: 100,
        maxY: 50,
      },
    };

    // @ts-ignore
    mocked(rive.Rive).mockImplementation(() => riveMock);

    const canvasSpy = document.createElement('canvas');

    const { result } = renderHook(() => useRive(params));

    await act(async () => {
      result.current.setCanvasRef(canvasSpy);
    });

    expect(observeMock).toBeCalledWith(canvasSpy);
  });
});