| 1 | const { Spider, Queue } = require("../build/index");
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| 2 |
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| 3 | describe("test for parameter check when initalize a spider", () => {
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| 4 | test("It will still ok when option is missing, because parameter opts is no required", () => {
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| 5 | let spider;
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| 6 | expect(() => {
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| 7 | spider = new Spider();
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| 8 | }).not.toThrow();
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| 9 | expect(typeof spider.add === "function").toBe(true);
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| 10 | spider.end();
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| 11 | });
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| 12 |
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| 13 | test("All will going well when parameter option is legal", () => {
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| 14 | let spider;
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| 15 | expect(() => {
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| 16 | spider = new Spider({
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| 17 | concurrency: 100,
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| 18 | queue: Queue,
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| 19 | rateLimit: 100,
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| 20 | });
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| 21 | }).not.toThrow();
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| 22 | expect(typeof spider.add === "function").toBe(true);
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| 23 | spider.end();
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| 24 |
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| 25 | let newSpider;
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| 26 | expect(() => {
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| 27 | newSpider = new Spider({
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| 28 | concurrency: {
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| 29 | "type1": 10,
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| 30 | "type2": 20,
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| 31 | },
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| 32 | queue: Queue,
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| 33 | });
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| 34 | }).not.toThrow();
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| 35 | expect(typeof newSpider.filter === "function").toBe(true);
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| 36 | newSpider.end();
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| 37 |
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| 38 | expect(() => {
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| 39 | spider = new Spider({
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| 40 | concurrency: {
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| 41 | "type1": 10,
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| 42 | "type2": 20,
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| 43 | },
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| 44 | queue: Queue,
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| 45 | rateLimit: 100,
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| 46 | });
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| 47 | }).not.toThrow();
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| 48 | expect(typeof spider.filter === "function").toBe(true);
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| 49 | spider.end();
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| 50 |
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| 51 | expect(() => {
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| 52 | spider = new Spider({
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| 53 | queue: Queue,
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| 54 | });
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| 55 | }).not.toThrow();
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| 56 | expect(typeof spider.filter === "function").toBe(true);
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| 57 | spider.end();
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| 58 | });
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| 59 |
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| 60 | test("when parameter option is not a object, there should be a TypeError", () => {
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| 61 | let spider;
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| 62 | expect(() => {
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| 63 | spider = new Spider(true);
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| 64 | }).toThrow(TypeError);
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| 65 | expect(typeof spider === "undefined").toBe(true);
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| 66 |
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| 67 | expect(() => {
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| 68 | spider = new Spider(1000);
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| 69 | }).toThrow(TypeError);
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| 70 | expect(typeof spider === "undefined").toBe(true);
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| 71 |
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| 72 | expect(() => {
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| 73 | spider = new Spider("a string");
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| 74 | }).toThrow(TypeError);
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| 75 | expect(typeof spider === "undefined").toBe(true);
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| 76 |
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| 77 | expect(() => {
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| 78 | spider = new Spider(() => "this is a function");
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| 79 | }).toThrow(TypeError);
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| 80 | expect(typeof spider === "undefined").toBe(true);
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| 81 | });
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| 82 |
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| 83 | test("When option's property has illegal type, there should be a TypeError throwed", () => {
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| 84 | let spider;
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| 85 | expect(() => {
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| 86 | spider = new Spider({
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| 87 | concurrency: "string",
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| 88 | });
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| 89 | }).toThrow(TypeError);
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| 90 | expect(typeof spider === "undefined").toBe(true);
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| 91 |
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| 92 | expect(() => {
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| 93 | spider = new Spider({
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| 94 | concurrency: "string",
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| 95 | rateLimit: "string",
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| 96 | });
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| 97 | }).toThrow(TypeError);
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| 98 | expect(typeof spider === "undefined").toBe(true);
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| 99 |
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| 100 | expect(() => {
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| 101 | spider = new Spider({
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| 102 | concurrency: 233,
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| 103 | rateLimit: () => "a function",
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| 104 | });
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| 105 | }).toThrow(TypeError);
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| 106 | expect(typeof spider === "undefined").toBe(true);
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| 107 |
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| 108 | expect(() => {
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| 109 | spider = new Spider({
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| 110 | concurrency: () => "a function",
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| 111 | queue: Queue,
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| 112 | rateLimit: 29,
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| 113 | });
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| 114 | }).toThrow(TypeError);
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| 115 | expect(typeof spider === "undefined").toBe(true);
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| 116 | });
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| 117 |
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| 118 | });
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