context_creation.spec.ts

export const description = `
Tests for canvas context creation.

Note there are no context creation attributes for WebGPU (as of this writing).
Options are configured in configure() instead.
`;

import { Fixture } from '../../../common/framework/fixture.js';
import { makeTestGroup } from '../../../common/framework/test_group.js';

export const g = makeTestGroup(Fixture);

g.test('return_type')
  .desc(
    `Test the return type of getContext for WebGPU.

    TODO: Test OffscreenCanvas made from transferControlToOffscreen.`
  )
  .params(u =>
    u //
      .combine('offscreen', [false, true])
      .beginSubcases()
      .combine('attributes', [undefined, {}])
  )
  .fn(t => {
    let canvas: HTMLCanvasElement | OffscreenCanvas;
    if (t.params.offscreen) {
      if (typeof OffscreenCanvas === 'undefined') {
        // Skip if the current context doesn't have OffscreenCanvas (e.g. Node).
        t.skip('OffscreenCanvas is not available in this context');
      }

      canvas = new OffscreenCanvas(10, 10);
    } else {
      if (typeof document === 'undefined') {
        // Skip if there is no document (Workers, Node)
        t.skip('DOM is not available to create canvas element');
      }

      canvas = document.createElement('canvas', t.params.attributes);
      canvas.width = 10;
      canvas.height = 10;
    }

    const ctx = canvas.getContext('webgpu');
    t.expect(ctx instanceof GPUCanvasContext);
  });