const {onRenderBody} = require(`../gatsby-ssr`);

const defaultPathPrefix = global.__PATH_PREFIX__;

describe(`Adds <Link> for site to head`, () => {
    beforeEach(() => {
        global.__PATH_PREFIX__ = ``;
    });

    afterEach(() => {
        global.__PATH_PREFIX__ = defaultPathPrefix;
    });

    it(`creates Link if createLinkInHead is true`, async () => {
        const pluginOptions = {
            createLinkInHead: true,
            output: `sitemap.xml`
        };
        const setHeadComponents = jest.fn();

        await onRenderBody(
            {
                setHeadComponents
            },
            pluginOptions
        );

        expect(setHeadComponents).toMatchSnapshot();
        expect(setHeadComponents).toHaveBeenCalledTimes(1);
    });

    it(`does not create Link if createLinkInHead is false`, async () => {
        const pluginOptions = {
            createLinkInHead: false,
            output: `sitemap.xml`
        };
        const setHeadComponents = jest.fn();

        await onRenderBody(
            {
                setHeadComponents
            },
            pluginOptions
        );

        expect(setHeadComponents).toMatchSnapshot();
        expect(setHeadComponents).toHaveBeenCalledTimes(0);
    });

    it(`creates Link href with path prefix when __PATH_PREFIX__ sets`, async () => {
        global.__PATH_PREFIX__ = `/hogwarts`;

        const pluginOptions = {
            createLinkInHead: true,
            output: `sitemap.xml`
        };
        const setHeadComponents = jest.fn();

        await onRenderBody(
            {
                setHeadComponents
            },
            pluginOptions
        );

        expect(setHeadComponents).toMatchSnapshot();
        expect(setHeadComponents).toHaveBeenCalledTimes(1);
    });
});