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node_modules/tapable/lib/__tests__/SyncBailHook.js 1.81 KB
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  /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Tobias Koppers @sokra
  */
  "use strict";
  
  require("babel-polyfill");
  
  const SyncBailHook = require("../SyncBailHook");
  
  describe("SyncBailHook", () => {
  	it("should allow to create sync bail hooks", async () => {
  		const h1 = new SyncBailHook(["a"]);
  		const h2 = new SyncBailHook(["a", "b"]);
  		const h3 = new SyncBailHook(["a"]);
  
  		let r = h1.call(1);
  		expect(r).toEqual(undefined);
  
  		h1.tap("A", a => undefined);
  		h2.tap("A", (a, b) => [a, b]);
  
  		expect(h1.call(1)).toEqual(undefined);
  		expect(await h1.promise(1)).toEqual(undefined);
  		expect(await pify(cb => h1.callAsync(1, cb))).toEqual(undefined);
  		expect(h2.call(1, 2)).toEqual([1, 2]);
  		expect(await h2.promise(1, 2)).toEqual([1, 2]);
  		expect(await pify(cb => h2.callAsync(1, 2, cb))).toEqual([1, 2]);
  
  		h1.tap("B", a => "ok" + a);
  		h2.tap("B", (a, b) => "wrong");
  
  		expect(h1.call(10)).toEqual("ok10");
  		expect(await h1.promise(10)).toEqual("ok10");
  		expect(await pify(cb => h1.callAsync(10, cb))).toEqual("ok10");
  		expect(h2.call(10, 20)).toEqual([10, 20]);
  		expect(await h2.promise(10, 20)).toEqual([10, 20]);
  		expect(await pify(cb => h2.callAsync(10, 20, cb))).toEqual([10, 20]);
  	});
  
  	it("should allow to intercept calls", () => {
  		const hook = new SyncBailHook(["x"]);
  
  		const mockCall = jest.fn();
  		const mockTap = jest.fn(x => x);
  
  		hook.intercept({
  			call: mockCall,
  			tap: mockTap
  		});
  
  		hook.call(5);
  
  		expect(mockCall).toHaveBeenLastCalledWith(5);
  		expect(mockTap).not.toHaveBeenCalled();
  
  		hook.tap("test", () => 10);
  
  		hook.call(7);
  
  		expect(mockCall).toHaveBeenLastCalledWith(7);
  		expect(mockTap).toHaveBeenCalled();
  	});
  });
  
  function pify(fn) {
  	return new Promise((resolve, reject) => {
  		fn((err, result) => {
  			if (err) reject(err);
  			else resolve(result);
  		});
  	});
  }