Function testLayer

modules/test-utils/src/lifecycle-test.ts:214–244

(opts: TestLayerOptions<LayerT>)

 * Use `testLayerAsync` if the layer's update flow contains async operations.
 */
export function testLayer<LayerT extends Layer>(opts: TestLayerOptions<LayerT>): void {
  const {Layer, testCases = [], spies = [], onError = defaultOnError, createSpy, resetSpy} = opts;

  const resources = setupLayerTests(`testing ${Layer.layerName}`, opts);

  let layer = new Layer();
  // Run successive update tests
  for (const testCase of testCases) {
    // Save old state before update
    const oldState = {...layer.state};

    const {layer: newLayer, spyMap} = runLayerTestUpdate(
      testCase,
      resources,
      layer,
      spies,
      createSpy
    );

    runLayerTestPostUpdateCheck(testCase, newLayer, oldState, spyMap);

    // Reset spies between test cases
    Object.keys(spyMap).forEach(k => resetSpy(spyMap[k]));
    layer = newLayer;
  }

  const error = cleanupAfterLayerTests(resources);
  if (error) {
    onError(error, `${Layer.layerName} should delete all resources`);
  }
}

/**
 * Initialize and updates a layer over a sequence of scenarios (test cases).