ladybird/Libraries/LibJS/Tests/builtins/JSON/JSON.parse.js

test("basic functionality", () => {
  expect(JSON.parse).toHaveLength(2);

  const properties = [
    ["5", 5],
    ["null", null],
    ["true", true],
    ["false", false],
    ['"test"', "test"],
    ['[1,2,"foo"]', [1, 2, "foo"]],
    ['{"foo":1,"bar":"baz"}', { foo: 1, bar: "baz" }],
  ];

  properties.forEach(testCase => {
    expect(JSON.parse(testCase[0])).toEqual(testCase[1]);
  });
});

test("syntax errors", () => {
  [
    undefined,
    NaN,
    -NaN,
    Infinity,
    -Infinity,
    '{ "foo" }',
    '{ foo: "bar" }',
    "[1,2,3,]",
    "[1,2,3, ]",
    '{ "foo": "bar",}',
    '{ "foo": "bar", }',
  ].forEach(test => {
    expect(() => {
      JSON.parse(test);
    }).toThrow(SyntaxError);
  });
});