89 lines
3.7 KiB
TypeScript
89 lines
3.7 KiB
TypeScript
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/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.dev/license
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*/
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import {ComponentHarness, HarnessPredicate, parallel} from '@angular/cdk/testing';
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import {ɵTileCoordinator as TileCoordinator} from '@angular/material/grid-list';
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import {GridListHarnessFilters, GridTileHarnessFilters} from './grid-list-harness-filters';
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import {MatGridTileHarness} from './grid-tile-harness';
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/** Harness for interacting with a standard `MatGridList` in tests. */
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export class MatGridListHarness extends ComponentHarness {
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/** The selector for the host element of a `MatGridList` instance. */
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static hostSelector = '.mat-grid-list';
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/**
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* Gets a `HarnessPredicate` that can be used to search for a `MatGridListHarness`
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* that meets certain criteria.
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* @param options Options for filtering which dialog instances are considered a match.
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* @return a `HarnessPredicate` configured with the given options.
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*/
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static with(options: GridListHarnessFilters = {}): HarnessPredicate<MatGridListHarness> {
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return new HarnessPredicate(MatGridListHarness, options);
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}
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/**
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* Tile coordinator that is used by the "MatGridList" for computing
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* positions of tiles. We leverage the coordinator to provide an API
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* for retrieving tiles based on visual tile positions.
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*/
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private _tileCoordinator = new TileCoordinator();
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/** Gets all tiles of the grid-list. */
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async getTiles(filters: GridTileHarnessFilters = {}): Promise<MatGridTileHarness[]> {
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return await this.locatorForAll(MatGridTileHarness.with(filters))();
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}
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/** Gets the amount of columns of the grid-list. */
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async getColumns(): Promise<number> {
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return Number(await (await this.host()).getAttribute('cols'));
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}
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/**
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* Gets a tile of the grid-list that is located at the given location.
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* @param row Zero-based row index.
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* @param column Zero-based column index.
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*/
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async getTileAtPosition({
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row,
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column,
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}: {
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row: number;
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column: number;
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}): Promise<MatGridTileHarness> {
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const [tileHarnesses, columns] = await parallel(() => [this.getTiles(), this.getColumns()]);
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const tileSpans = tileHarnesses.map(t => parallel(() => [t.getColspan(), t.getRowspan()]));
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const tiles = (await parallel(() => tileSpans)).map(([colspan, rowspan]) => ({
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colspan,
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rowspan,
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}));
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// Update the tile coordinator to reflect the current column amount and
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// rendered tiles. We update upon every call of this method since we do not
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// know if tiles have been added, removed or updated (in terms of rowspan/colspan).
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this._tileCoordinator.update(columns, tiles);
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// The tile coordinator respects the colspan and rowspan for calculating the positions
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// of tiles, but it does not create multiple position entries if a tile spans over multiple
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// columns or rows. We want to provide an API where developers can retrieve a tile based on
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// any position that lies within the visual tile boundaries. For example: If a tile spans
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// over two columns, then the same tile should be returned for either column indices.
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for (let i = 0; i < this._tileCoordinator.positions.length; i++) {
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const position = this._tileCoordinator.positions[i];
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const {rowspan, colspan} = tiles[i];
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// Return the tile harness if the given position visually resolves to the tile.
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if (
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column >= position.col &&
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column <= position.col + colspan - 1 &&
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row >= position.row &&
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row <= position.row + rowspan - 1
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) {
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return tileHarnesses[i];
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}
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}
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throw Error('Could not find tile at given position.');
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}
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}
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