expand-npm-wildcard.spec.js

const ExpandNpmWildcard = require('./expand-npm-wildcard');

let parser, readPkg;

beforeEach(() => {
    readPkg = jest.fn();
    parser = new ExpandNpmWildcard(readPkg);
});

it('returns same command if not an npm run command', () => {
    const commandInfo = {
        command: 'npm test'
    };

    expect(readPkg).not.toHaveBeenCalled();
    expect(parser.parse(commandInfo)).toBe(commandInfo);
});

it('returns same command if no wildcard present', () => {
    const commandInfo = {
        command: 'npm run foo bar'
    };

    expect(readPkg).not.toHaveBeenCalled();
    expect(parser.parse(commandInfo)).toBe(commandInfo);
});

it('expands to nothing if no scripts exist in package.json', () => {
    readPkg.mockReturnValue({});

    expect(parser.parse({ command: 'npm run foo-*-baz qux' })).toEqual([]);
});

for (const npmCmd of ['npm', 'yarn']) {
    describe(`with an ${npmCmd}: prefix`, () => {
        it('expands to all scripts matching pattern', () => {
            readPkg.mockReturnValue({
                scripts: {
                    'foo-bar-baz': '',
                    'foo--baz': '',
                }
            });

            expect(parser.parse({ command: `${npmCmd} run foo-*-baz qux` })).toEqual([
                { name: 'bar', command: `${npmCmd} run foo-bar-baz qux` },
                { name: 'foo--baz', command: `${npmCmd} run foo--baz qux` },
            ]);
        });

        it('caches scripts upon calls', () => {
            readPkg.mockReturnValue({});
            parser.parse({ command: `${npmCmd} run foo-*-baz qux` });
            parser.parse({ command: `${npmCmd} run foo-*-baz qux` });

            expect(readPkg).toHaveBeenCalledTimes(1);
        });
    });
}