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); }); }); test("negative zero", () => { ["-0", " \n-0", "-0 \t", "\n\t -0\n ", "-0.0"].forEach(testCase => { expect(JSON.parse(testCase)).toEqual(-0.0); }); expect(JSON.parse(-0)).toEqual(0); }); // The underlying parser resolves decimal numbers by storing the decimal portion in an integer // This test handles a regression where the decimal portion was only using a u32 vs. u64 // and would fail to parse. test("long decimal parse", () => { expect(JSON.parse("1644452550.6489999294281")).toEqual(1644452550.6489999294281); }); test("does not truncate large integers", () => { expect(JSON.parse("1234567890123")).toEqual(1234567890123); expect(JSON.parse("4294967295")).toEqual(4294967295); expect(JSON.parse("4294967296")).toEqual(4294967296); expect(JSON.parse("4294967297")).toEqual(4294967297); expect(JSON.parse("4294967298")).toEqual(4294967298); expect(JSON.parse("2147483647")).toEqual(2147483647); expect(JSON.parse("2147483648")).toEqual(2147483648); expect(JSON.parse("2147483649")).toEqual(2147483649); expect(JSON.parse("2147483650")).toEqual(2147483650); expect(JSON.parse("9007199254740991")).toEqual(9007199254740991); expect(JSON.parse("9007199254740992")).toEqual(9007199254740992); expect(JSON.parse("9007199254740993")).toEqual(9007199254740993); expect(JSON.parse("9007199254740994")).toEqual(9007199254740994); expect(JSON.parse("9008199254740994")).toEqual(9008199254740994); expect(JSON.parse("18446744073709551615")).toEqual(18446744073709551615); expect(JSON.parse("18446744073709551616")).toEqual(18446744073709551616); expect(JSON.parse("18446744073709551617")).toEqual(18446744073709551617); });