import { handleFilter, searchItem, getSumScrollTop } from './ComboBox.utils';

describe('ComboBox utils', () => {
  describe('handleFilter', () => {
    const comboBoxGroupsWithSection = [
      {
        section: 'secitonA',
        items: [
          { key: 'keyA1', label: 'itemA1' },
          { key: 'keyA2', label: 'itemA2' },
          { key: 'keyA3', label: 'itemA3' },
        ],
      },
      {
        section: 'seciontB',
        items: [
          { key: 'keyB1', label: 'itemB1' },
          { key: 'keyB2', label: 'itemB2' },
          { key: 'keyB3', label: 'itemB3' },
        ],
      },
    ];

    const comboBoxGroupsWithoutSection = [
      {
        items: [
          { key: 'keyA1', label: 'itemA1' },
          { key: 'keyA2', label: 'itemA2' },
          { key: 'keyA3', label: 'itemA3' },
          { key: 'keyB1', label: 'itemB1' },
          { key: 'keyB2', label: 'itemB2' },
          { key: 'keyB3', label: 'itemB3' },
        ],
      },
    ];

    it('test case withSection', () => {
      expect(handleFilter(comboBoxGroupsWithSection, '1')).toEqual([
        { section: 'secitonA', items: [{ key: 'keyA1', label: 'itemA1' }] },
        { section: 'seciontB', items: [{ key: 'keyB1', label: 'itemB1' }] },
      ]);
      expect(handleFilter(comboBoxGroupsWithSection, 'A')).toEqual([
        {
          section: 'secitonA',
          items: [
            { key: 'keyA1', label: 'itemA1' },
            { key: 'keyA2', label: 'itemA2' },
            { key: 'keyA3', label: 'itemA3' },
          ],
        },
      ]);
    });

    it('test case withoutSection', () => {
      expect(handleFilter(comboBoxGroupsWithoutSection, '1')).toEqual([
        {
          items: [
            { key: 'keyA1', label: 'itemA1' },
            { key: 'keyB1', label: 'itemB1' },
          ],
        },
      ]);

      expect(handleFilter(comboBoxGroupsWithoutSection, 'a')).toEqual([
        {
          items: [
            { key: 'keyA1', label: 'itemA1' },
            { key: 'keyA2', label: 'itemA2' },
            { key: 'keyA3', label: 'itemA3' },
          ],
        },
      ]);

      expect(handleFilter(comboBoxGroupsWithoutSection, 'A')).toEqual([
        {
          items: [
            { key: 'keyA1', label: 'itemA1' },
            { key: 'keyA2', label: 'itemA2' },
            { key: 'keyA3', label: 'itemA3' },
          ],
        },
      ]);
    });

    it('test case not match any of the item labels', () => {
      expect(handleFilter(comboBoxGroupsWithoutSection, 'c')).toEqual([]);
    });
  });

  describe('searchItem', () => {
    const comboBoxGroupsWithSection = [
      {
        section: 'secitonA',
        items: [
          { key: 'keyA1', label: 'itemA1' },
          { key: 'keyA2', label: 'itemA2' },
          { key: 'keyA3', label: 'itemA3' },
        ],
      },
      {
        section: 'seciontB',
        items: [
          { key: 'keyB1', label: 'itemB1' },
          { key: 'keyB2', label: 'itemB2' },
          { key: 'keyB3', label: 'itemB3' },
        ],
      },
    ];

    const comboBoxGroupsWithoutSection = [
      {
        items: [
          { key: 'keyA1', label: 'itemA1' },
          { key: 'keyA2', label: 'itemA2' },
          { key: 'keyA3', label: 'itemA3' },
          { key: 'keyB1', label: 'itemB1' },
          { key: 'keyB2', label: 'itemB2' },
          { key: 'keyB3', label: 'itemB3' },
        ],
      },
    ];

    it('test case withSection', () => {
      expect(searchItem('keyA1', comboBoxGroupsWithSection)).toEqual({
        key: 'keyA1',
        label: 'itemA1',
      });
    });

    it('test case withoutSection', () => {
      expect(searchItem('keyB1', comboBoxGroupsWithoutSection)).toEqual({
        key: 'keyB1',
        label: 'itemB1',
      });
    });

    it('test case not match any of the item keys', () => {
      expect(searchItem('key1', comboBoxGroupsWithoutSection)).toEqual({
        key: undefined,
        label: undefined,
      });
    });
  });

  describe('getSumScrollTop', () => {
    const sampleElement1 = {
      scrollTop: 0,
    };

    const sampleElement2 = {
      scrollTop: NaN,
      parentElement: sampleElement1,
    };

    const sampleElement3 = {
      scrollTop: 18.5,
      parentElement: sampleElement2,
    };

    const sampleElement4 = {
      scrollTop: 10.5,
      parentElement: sampleElement3,
    };

    it.each`
      element           | expectedSum
      ${sampleElement1} | ${0}
      ${sampleElement2} | ${0}
      ${sampleElement3} | ${0}
      ${sampleElement4} | ${18.5}
    `('correctly returns $expectedSum for $element', ({ element, expectedSum }) => {
      expect(getSumScrollTop(element)).toEqual(expectedSum);
    });
  });
});