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index.spec.js
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index.spec.js
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/* eslint-env jest */
const demoLoader = require("./index");
const mockFs = require("mock-fs");
function delay(timeInMs = 0) {
return new Promise(resolve => {
setTimeout(resolve, timeInMs);
});
}
describe("Demo Loader (when markdown exists)", () => {
beforeEach(() => {
mockFs({
"some/resource/file.js": "some source code",
"some/resource/file.md": "some markdown"
});
});
afterEach(() => mockFs.restore());
it("runs successfully", () => {
expect.assertions(2);
const loaderCallback = jest.fn();
const context = {
async: () => loaderCallback,
resource: "some/resource/file.js",
addDependency: jest.fn(() => { /* do nothing */ })
};
const remainingRequest = "someRemainingRequest";
demoLoader.pitch.apply(context, [remainingRequest]);
const expectedModuleCode = `
module.exports = require("!!someRemainingRequest");
const rawSource = "some source code";
const markdown = "some markdown";
if (module.exports.default) {
module.exports.default.__source__ = rawSource;
module.exports.default.__markdown__ = markdown;
}
module.exports.__source = rawSource;
module.exports.__markdown__ = markdown;
`;
return delay().then(() => {
expect(loaderCallback).toHaveBeenCalledWith(null, expectedModuleCode);
expect(context.addDependency).toHaveBeenCalledWith("some/resource/file.md");
});
});
});
describe("Demo Loader (when markdown does not exist)", () => {
beforeEach(() => {
mockFs({
"some/resource/file.js": "some source code"
});
});
afterEach(() => mockFs.restore());
it("runs successfully", () => {
expect.assertions(2);
const loaderCallback = jest.fn();
const context = {
async: () => loaderCallback,
resource: "some/resource/file.js",
addDependency: jest.fn(() => { /* do nothing */ })
};
const remainingRequest = "someRemainingRequest";
demoLoader.pitch.apply(context, [remainingRequest]);
const expectedModuleCode = `
module.exports = require("!!someRemainingRequest");
const rawSource = "some source code";
const markdown = "";
if (module.exports.default) {
module.exports.default.__source__ = rawSource;
module.exports.default.__markdown__ = markdown;
}
module.exports.__source = rawSource;
module.exports.__markdown__ = markdown;
`;
return delay().then(() => {
expect(loaderCallback).toHaveBeenCalledWith(null, expectedModuleCode);
expect(context.addDependency).not.toHaveBeenCalled();
});
});
});