/**
 * Copyright 2018 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { range, scan, collect } from "../../src/index.js";

Mocha.describe("scan()", function() {
  Mocha.it(
    "scans over an observable with a reducer function",
    async function() {
      const list = await collect(
        range(1, 5).pipeThrough(scan((a, b) => a + b, 0))
      );

      chai.expect(list).to.deep.equal([1, 3, 6, 10, 15]);
    }
  );
});