You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
2.1 KiB
71 lines
2.1 KiB
const { lintTransformedFile } = require('./utils');
|
|
|
|
let mockESLint;
|
|
|
|
jest.mock('eslint', () => ({
|
|
ESLint: class MockESLint {
|
|
constructor() {
|
|
if (mockESLint) {
|
|
throw new Error('Mock ESLint ref already assigned!');
|
|
}
|
|
|
|
// eslint-disable-next-line consistent-this
|
|
mockESLint = this;
|
|
|
|
// eslint-disable-next-line jest/prefer-spy-on
|
|
this.lintText = jest.fn();
|
|
}
|
|
},
|
|
}));
|
|
|
|
describe('transform utils', () => {
|
|
describe('lintTransformedFile', () => {
|
|
it('initializes the ESLint singleton', async () => {
|
|
expect(mockESLint).not.toBeDefined();
|
|
|
|
// This error is an artifact of how we're mocking the ESLint singleton,
|
|
// and won't actually occur in production.
|
|
await expect(() => lintTransformedFile()).rejects.toThrow(
|
|
`Cannot read property '0' of undefined`,
|
|
);
|
|
expect(mockESLint).toBeDefined();
|
|
});
|
|
|
|
it('returns if linting passes with no errors', async () => {
|
|
mockESLint.lintText.mockImplementationOnce(() =>
|
|
Promise.resolve([{ errorCount: 0 }]),
|
|
);
|
|
|
|
expect(
|
|
await lintTransformedFile('/* JavaScript */', 'file.js'),
|
|
).toBeUndefined();
|
|
});
|
|
|
|
it('throws if the file is ignored by ESLint', async () => {
|
|
mockESLint.lintText.mockImplementationOnce(() => Promise.resolve([]));
|
|
|
|
await expect(() =>
|
|
lintTransformedFile('/* JavaScript */', 'file.js'),
|
|
).rejects.toThrow(
|
|
/Transformed file "file\.js" appears to be ignored by ESLint\.$/u,
|
|
);
|
|
});
|
|
|
|
it('throws if linting produced any errors', async () => {
|
|
const ruleId = 'some-eslint-rule';
|
|
const message = 'You violated the rule!';
|
|
|
|
mockESLint.lintText.mockImplementationOnce(() =>
|
|
Promise.resolve([
|
|
{ errorCount: 1, messages: [{ message, ruleId, severity: 2 }] },
|
|
]),
|
|
);
|
|
|
|
await expect(() =>
|
|
lintTransformedFile('/* JavaScript */', 'file.js'),
|
|
).rejects.toThrow(
|
|
/Lint errors encountered for transformed file "file\.js":\n\n {4}some-eslint-rule\n {4}You violated the rule!\n\n$/u,
|
|
);
|
|
});
|
|
});
|
|
});
|
|
|