var RuleTester = require('eslint').RuleTester;
var rxjsNoMemoryLeaksRule = require('./rxjs-no-memory-leaks');

describe('rxjs-no-memory-leak', () => {
  let ruleTester = new RuleTester({
    parserOptions: {ecmaVersion: 2015}
  });

  ruleTester.run(
    "rxjs-no-memory-leaks",
    rxjsNoMemoryLeaksRule,
    {
      valid: [{
        code: `
          let subjValid$ = new Subject();
          let destroy$ = new Subject();

          subjValid$.pipe(map(() => 1234),
                          tap(console.log),
                          takeUntil(destroy$)).subscribe(console.log);

          subjValid$.next();
        `,
      }],
      invalid: [
        {
          code: `
                let subjInval1$ = new Subject();

                subjInval$1.subscribe(() => console.log(1234));
              `,
          errors: [{message: 'Subscriptions Should be piped with release operator'}],
        },
        {
          code: `
                let subjInval2$ = new Subject();

                subjInval2$.pipe().subscribe(() => console.log(1234));
              `,
          errors: [{message: 'Pipe associated with subscribed observable should have release operator such `takeUntil(destroy$)`'}],
        },
        {
          code: `
                let subjInval3$ = new Subject();

                subjInval3$.pipe(map(() => console.log(4567))).subscribe(() => console.log(1234));
              `,
          errors: [{message: 'Last operator in pipe should release subscription. Example: `subj$.pipe(operator1(), operator2(), takeUntil(destroy$))`'}],
        }
      ],
    }
  );
});