text: const isValid = require("../20.Valid_Parentheses");
  
  describe("isValid", () => {
    it("test 1", () => {
      expect(isValid("()")).toEqual(true);
    });
  
    it("test 2", () => {
      expect(isValid("()[]{}")).toEqual(true);
    });
  
    it("test 3", () => {
      expect(isValid("(]")).toEqual(false);
    });
  
    it("test 4", () => {
      expect(isValid("([)]")).toEqual(false);
    });
  
    it("test 5", () => {
      expect(isValid("{[]}")).toEqual(true);
    });
  
    it("test 6", () => {
      expect(isValid("]")).toEqual(true);
    });
  });
  