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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { assertSpyCall, assertSpyCalls, spy } from "../mock.ts";import { assertEquals } from "../asserts.ts";import { _internals, square } from "./internals_injection.ts";
Deno.test("square calls multiply and returns results", () => {  const multiplySpy = spy(_internals, "multiply");
  try {    assertEquals(square(5), 25);  } finally {    // unwraps the multiply method on the _internals object    multiplySpy.restore();  }
  // asserts that multiplySpy was called at least once and details about the first call.  assertSpyCall(multiplySpy, 0, {    args: [5, 5],    returned: 25,  });
  // asserts that multiplySpy was only called once.  assertSpyCalls(multiplySpy, 1);});