querystring.test.js

// In the prep, we implemented a function to parse query strings.
// Unfortunately, it contains several bugs!
// Below is one test case for an edge case the implementation doesn't handle well.
// Fix the implementation for this test, and try to think of as many other edge cases as possible - write tests and fix those too.

const parseQueryString = require("./querystring.js")

test("parses querystring values containing =", () => {
  expect(parseQueryString("equation=x=y+1")).toEqual({
    "equation": "x=y+1",
  });
});

test("parses querystring values containing &", () => {
  expect(parseQueryString("equation=x&y=1")).toEqual({
    "equation": "x",
    "y": "1",
  });
});

test("parses querystring values containing & and =", () => {
  expect(parseQueryString("equation=x&y=1&formula=a=b+c")).toEqual({
    "equation": "x",
    "y": "1",
    "formula": "a=b+c",
  });
});

test("parses empty querystring", () => {
  expect(parseQueryString("")).toEqual({});
});

test("parses querystring with no value", () => {
  expect(parseQueryString("key")).toEqual({
    "key": "",
  });
});