Simple iteration of test cases in Jasmine or Jest

running-multiple-test-cases.spec.ts

const someMethod = (input: string) => (input === 'value' ? true : false);

describe('someMethod', () => {
  const testCases: Array<[boolean, string]> = [
    [true, 'value'],
    [false, 'other-value']
  ];

  testCases.forEach(([expected, input]: [boolean, string]) =>
    it(`should return ${expected} given ${input}`, () => {
      // act
      const actual = someMethod(input);

      // assert
      expect(actual).toEqual(expected);
    })
  );
});