I have written a WebPack Loader, mostly based on the instructions given in https://webpack.js.org/contribute/writing-a-loader/ .

Their way of testing the result is expect(output).toBe('export default "Hey Alice!\\n"'), which is hard to maintain, because it makes an assumption of the formatting of the source code generated by the loader.

To have more possibilities, I have tried to import the generated module via import("data:text/javascript;base64," + Buffer.from(output.toString("ascii"), "ascii").toString("base64")), which results in getting [Error: Cannot find module 'data:text/javascript;base64,...

Questions:

• Is there something I have to do additionally, that import can handle data URLs as source for modules?
• Is there an alternative way to import a module from a memfs (https://github.com/streamich/memfs)?

P.S.: For the case it makes a difference, the loader and test case is implemented in typescript.