@angular/material
Version:
Angular Material
123 lines • 14.6 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { ComponentHarness, HarnessPredicate, parallel } from '@angular/cdk/testing';
import { MatTreeNodeHarness } from './node-harness';
/** Harness for interacting with a standard mat-tree in tests. */
export class MatTreeHarness extends ComponentHarness {
/**
* Gets a `HarnessPredicate` that can be used to search for a tree with specific attributes.
* @param options Options for narrowing the search
* @return a `HarnessPredicate` configured with the given options.
*/
static with(options = {}) {
return new HarnessPredicate(MatTreeHarness, options);
}
/** Gets all of the nodes in the tree. */
async getNodes(filter = {}) {
return this.locatorForAll(MatTreeNodeHarness.with(filter))();
}
/**
* Gets an object representation for the visible tree structure
* If a node is under an unexpanded node it will not be included.
* Eg.
* Tree (all nodes expanded):
* `
* <mat-tree>
* <mat-tree-node>Node 1<mat-tree-node>
* <mat-nested-tree-node>
* Node 2
* <mat-nested-tree-node>
* Node 2.1
* <mat-tree-node>
* Node 2.1.1
* <mat-tree-node>
* <mat-nested-tree-node>
* <mat-tree-node>
* Node 2.2
* <mat-tree-node>
* <mat-nested-tree-node>
* </mat-tree>`
*
* Tree structure:
* {
* children: [
* {
* text: 'Node 1',
* children: [
* {
* text: 'Node 2',
* children: [
* {
* text: 'Node 2.1',
* children: [{text: 'Node 2.1.1'}]
* },
* {text: 'Node 2.2'}
* ]
* }
* ]
* }
* ]
* };
*/
async getTreeStructure() {
const nodes = await this.getNodes();
const nodeInformation = await parallel(() => nodes.map(node => {
return parallel(() => [node.getLevel(), node.getText(), node.isExpanded()]);
}));
return this._getTreeStructure(nodeInformation, 1, true);
}
/**
* Recursively collect the structured text of the tree nodes.
* @param nodes A list of tree nodes
* @param level The level of nodes that are being accounted for during this iteration
* @param parentExpanded Whether the parent of the first node in param nodes is expanded
*/
_getTreeStructure(nodes, level, parentExpanded) {
const result = {};
for (let i = 0; i < nodes.length; i++) {
const [nodeLevel, text, expanded] = nodes[i];
const nextNodeLevel = nodes[i + 1]?.[0] ?? -1;
// Return the accumulated value for the current level once we reach a shallower level node
if (nodeLevel < level) {
return result;
}
// Skip deeper level nodes during this iteration, they will be picked up in a later iteration
if (nodeLevel > level) {
continue;
}
// Only add to representation if it is visible (parent is expanded)
if (parentExpanded) {
// Collect the data under this node according to the following rules:
// 1. If the next node in the list is a sibling of the current node add it to the child list
// 2. If the next node is a child of the current node, get the sub-tree structure for the
// child and add it under this node
// 3. If the next node has a shallower level, we've reached the end of the child nodes for
// the current parent.
if (nextNodeLevel === level) {
this._addChildToNode(result, { text });
}
else if (nextNodeLevel > level) {
let children = this._getTreeStructure(nodes.slice(i + 1), nextNodeLevel, expanded)?.children;
let child = children ? { text, children } : { text };
this._addChildToNode(result, child);
}
else {
this._addChildToNode(result, { text });
return result;
}
}
}
return result;
}
_addChildToNode(result, child) {
result.children ? result.children.push(child) : (result.children = [child]);
}
}
/** The selector for the host element of a `MatTableHarness` instance. */
MatTreeHarness.hostSelector = '.mat-tree';
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ComponentHarness, HarnessPredicate, parallel} from '@angular/cdk/testing';\nimport {MatTreeNodeHarness} from './node-harness';\nimport {TreeHarnessFilters, TreeNodeHarnessFilters} from './tree-harness-filters';\n\nexport type TextTree = {\n  text?: string;\n  children?: TextTree[];\n};\n\n/** Harness for interacting with a standard mat-tree in tests. */\nexport class MatTreeHarness extends ComponentHarness {\n  /** The selector for the host element of a `MatTableHarness` instance. */\n  static hostSelector = '.mat-tree';\n\n  /**\n   * Gets a `HarnessPredicate` that can be used to search for a tree with specific attributes.\n   * @param options Options for narrowing the search\n   * @return a `HarnessPredicate` configured with the given options.\n   */\n  static with(options: TreeHarnessFilters = {}): HarnessPredicate<MatTreeHarness> {\n    return new HarnessPredicate(MatTreeHarness, options);\n  }\n\n  /** Gets all of the nodes in the tree. */\n  async getNodes(filter: TreeNodeHarnessFilters = {}): Promise<MatTreeNodeHarness[]> {\n    return this.locatorForAll(MatTreeNodeHarness.with(filter))();\n  }\n\n  /**\n   * Gets an object representation for the visible tree structure\n   * If a node is under an unexpanded node it will not be included.\n   * Eg.\n   * Tree (all nodes expanded):\n   * `\n   * <mat-tree>\n   *   <mat-tree-node>Node 1<mat-tree-node>\n   *   <mat-nested-tree-node>\n   *     Node 2\n   *     <mat-nested-tree-node>\n   *       Node 2.1\n   *       <mat-tree-node>\n   *         Node 2.1.1\n   *       <mat-tree-node>\n   *     <mat-nested-tree-node>\n   *     <mat-tree-node>\n   *       Node 2.2\n   *     <mat-tree-node>\n   *   <mat-nested-tree-node>\n   * </mat-tree>`\n   *\n   * Tree structure:\n   * {\n   *  children: [\n   *    {\n   *      text: 'Node 1',\n   *      children: [\n   *        {\n   *          text: 'Node 2',\n   *          children: [\n   *            {\n   *              text: 'Node 2.1',\n   *              children: [{text: 'Node 2.1.1'}]\n   *            },\n   *            {text: 'Node 2.2'}\n   *          ]\n   *        }\n   *      ]\n   *    }\n   *  ]\n   * };\n   */\n  async getTreeStructure(): Promise<TextTree> {\n    const nodes = await this.getNodes();\n    const nodeInformation = await parallel(() =>\n      nodes.map(node => {\n        return parallel(() => [node.getLevel(), node.getText(), node.isExpanded()]);\n      }),\n    );\n    return this._getTreeStructure(nodeInformation, 1, true);\n  }\n\n  /**\n   * Recursively collect the structured text of the tree nodes.\n   * @param nodes A list of tree nodes\n   * @param level The level of nodes that are being accounted for during this iteration\n   * @param parentExpanded Whether the parent of the first node in param nodes is expanded\n   */\n  private _getTreeStructure(\n    nodes: [number, string, boolean][],\n    level: number,\n    parentExpanded: boolean,\n  ): TextTree {\n    const result: TextTree = {};\n    for (let i = 0; i < nodes.length; i++) {\n      const [nodeLevel, text, expanded] = nodes[i];\n      const nextNodeLevel = nodes[i + 1]?.[0] ?? -1;\n\n      // Return the accumulated value for the current level once we reach a shallower level node\n      if (nodeLevel < level) {\n        return result;\n      }\n      // Skip deeper level nodes during this iteration, they will be picked up in a later iteration\n      if (nodeLevel > level) {\n        continue;\n      }\n      // Only add to representation if it is visible (parent is expanded)\n      if (parentExpanded) {\n        // Collect the data under this node according to the following rules:\n        // 1. If the next node in the list is a sibling of the current node add it to the child list\n        // 2. If the next node is a child of the current node, get the sub-tree structure for the\n        //    child and add it under this node\n        // 3. If the next node has a shallower level, we've reached the end of the child nodes for\n        //    the current parent.\n        if (nextNodeLevel === level) {\n          this._addChildToNode(result, {text});\n        } else if (nextNodeLevel > level) {\n          let children = this._getTreeStructure(\n            nodes.slice(i + 1),\n            nextNodeLevel,\n            expanded,\n          )?.children;\n          let child = children ? {text, children} : {text};\n          this._addChildToNode(result, child);\n        } else {\n          this._addChildToNode(result, {text});\n          return result;\n        }\n      }\n    }\n    return result;\n  }\n\n  private _addChildToNode(result: TextTree, child: TextTree) {\n    result.children ? result.children.push(child) : (result.children = [child]);\n  }\n}\n"]}