Updated the files.

my-app/node_modules/@angular-devkit/schematics/testing/schematic-test-runner.d.ts

@@ -0,0 +1,29 @@
+/**
+ * @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 { logging } from '@angular-devkit/core';
+import { Observable } from 'rxjs';
+import { DelegateTree, Rule, SchematicContext, SchematicEngine, TaskConfiguration, Tree } from '../src';
+export declare class UnitTestTree extends DelegateTree {
+    get files(): string[];
+    readContent(path: string): string;
+}
+export declare class SchematicTestRunner {
+    private _collectionName;
+    private _engineHost;
+    private _engine;
+    private _collection;
+    private _logger;
+    constructor(_collectionName: string, collectionPath: string);
+    get engine(): SchematicEngine<{}, {}>;
+    get logger(): logging.Logger;
+    get tasks(): TaskConfiguration[];
+    registerCollection(collectionName: string, collectionPath: string): void;
+    runSchematic<SchematicSchemaT extends object>(schematicName: string, opts?: SchematicSchemaT, tree?: Tree): Promise<UnitTestTree>;
+    runExternalSchematic<SchematicSchemaT extends object>(collectionName: string, schematicName: string, opts?: SchematicSchemaT, tree?: Tree): Promise<UnitTestTree>;
+    callRule(rule: Rule, tree: Tree, parentContext?: Partial<SchematicContext>): Observable<Tree>;
+}