johnny-cli/src/__mocks__/fs.js

CLI for Johnny Deps

const
	fs = jest.genMockFromModule('fs');

let
	mockFileSystem = Object.create(null);

fs.__setMockFiles = mockFiles => mockFileSystem = mockFiles;
fs.readdirSync = directoryPath => mockFileSystem[directoryPath] || [];
fs.readFileSync = filePath => mockFileSystem[filePath];

fs.mkdirSync = function(directoryPath) {
	const
		noTrailingSlashPath = directoryPath.replace(/\/$/, '');

	if(mockFileSystem[noTrailingSlashPath] !== undefined || mockFileSystem[`${noTrailingSlashPath}/`] !== undefined)
		throw 'Directory exists';

	mockFileSystem[directoryPath] = {};
}

module.exports = fs;