get-definition-at-position.test.ts

import ts from 'typescript';
import { mark, type Frets } from 'fretted-strings';
import { AdapterFixture } from './testing/adapter-fixture';
import { getDefinitionAtPosition } from './get-definition-at-position';

function createFixture(name: string) {
  return new AdapterFixture(name);
}

describe(getDefinitionAtPosition, () => {
  const delegateFn = jest.fn(() => []);
  it('should works', () => {
    const fixture = createFixture('input.ts');
    const frets: Frets = {};
    fixture.source = mark(
      `
      const query = \`
        query MyQuery {
          ...MyFragment
     %%%     ^                          %%%
     %%%     cur                        %%%
        }

        fragment MyFragment on Query {
     %%%         ^         ^            %%%
     %%%         d1        d2           %%%
          __typename
        }
      \`
    `,
      frets,
    );
    const actual = fixture.adapter.getDefinitionAtPosition(delegateFn, 'input.ts', frets.cur.pos);
    expect(actual).toMatchObject([
      {
        fileName: 'input.ts',
        textSpan: {
          start: frets.d1.pos,
          length: frets.d2.pos - frets.d1.pos,
        },
      },
    ] as Partial<ts.DefinitionInfo>[]);
  });
});