import {
  concat,
  getPageFromMatch,
  getQueryStringFromLocation,
  withEndingSlash,
} from './urls';

describe('tests for withEndingSlash', () => {
  it('should append missing slash', () => {
    expect(withEndingSlash('abc')).toBe('abc/');
  });

  it('should not append a second slash', () => {
    expect(withEndingSlash('abc/')).toBe('abc/');
  });
});

describe('concat tests', () => {
  it('should concat the parts to a single url', () => {
    expect(concat('a')).toBe('a');
    expect(concat('a', 'b')).toBe('a/b');
    expect(concat('a', 'b', 'c')).toBe('a/b/c');
  });
});

describe('tests for getPageFromMatch', () => {
  function createMatch(page: string) {
    return {
      params: {
        page,
      },
    };
  }

  it('should return 1 for NaN', () => {
    const match = createMatch('any');
    expect(getPageFromMatch(match)).toBe(1);
  });

  it('should return 1 for 0', () => {
    const match = createMatch('0');
    expect(getPageFromMatch(match)).toBe(1);
  });

  it('should return the given number', () => {
    const match = createMatch('42');
    expect(getPageFromMatch(match)).toBe(42);
  });
});

describe('tests for getQueryStringFromLocation', () => {
  function createLocation(search: string) {
    return {
      search,
    };
  }

  it('should return the query string', () => {
    const location = createLocation('?q=abc');
    expect(getQueryStringFromLocation(location)).toBe('abc');
  });

  it('should return query string from multiple parameters', () => {
    const location = createLocation('?x=a&y=b&q=abc&z=c');
    expect(getQueryStringFromLocation(location)).toBe('abc');
  });

  it('should return undefined if q is not available', () => {
    const location = createLocation('?x=a&y=b&z=c');
    expect(getQueryStringFromLocation(location)).toBeUndefined();
  });
});