import ImageHelper from "../src/imageHelper";
import fetch from "got-cjs";
jest.mock('got-cjs');
const fetchMock = jest.mocked(fetch);
describe("FetchImageFromRedditGallery", () => {
test("EXPECT image url to be returned", async () => {
fetchMock.mockResolvedValue({
body: "
",
errored: undefined,
statusCode: 200,
});
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(fetchMock).toHaveBeenCalledTimes(1);
expect(fetchMock).toHaveBeenCalledWith("https://redd.it/gallery/image");
expect(result).toBe("https://preview.redd.it/image.png");
});
test("GIVEN fetch is unable to return data, EXPECT undefined returned", async () => {
fetchMock.mockResolvedValue(null);
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(result).toBeUndefined();
});
test("GIVEN fetch is an error, EXPECT undefined returned", async () => {
fetchMock.mockResolvedValue({
body: "",
errored: "Error",
statusCode: 200,
});
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(result).toBeUndefined();
});
test("GIVEN fetch is not status code of 200, EXPECT undefined returned", async () => {
fetchMock.mockResolvedValue({
body: "",
errored: undefined,
statusCode: 500,
});
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(result).toBeUndefined();
});
test("GIVEN image tag is not found, EXPECT undefined returned", async () => {
fetchMock.mockResolvedValue({
body: "",
errored: undefined,
statusCode: 200,
});
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(result).toBeUndefined();
});
test("GIVEN image source attribute is not found, EXPECT undefined returned", async () => {
fetchMock.mockResolvedValue({
body: "![]()
",
errored: undefined,
statusCode: 200,
});
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(result).toBeUndefined();
});
test("GIVEN image source attribute is not found that is a preview.redd.it url, EXPECT undefined returned", async () => {
fetchMock.mockResolvedValue({
body: "
",
errored: undefined,
statusCode: 200,
});
const result = await ImageHelper.FetchImageFromRedditGallery("https://redd.it/gallery/image");
expect(result).toBeUndefined();
});
});