1 #![allow(rustc::internal)]
3 extern crate serialize as rustc_serialize;
5 use json::DecoderError::*;
6 use json::ErrorCode::*;
8 use json::JsonEvent::*;
9 use json::ParserError::*;
11 from_str, DecodeResult, Decoder, DecoderError, Encoder, EncoderError, Json, JsonEvent, Parser,
14 use rustc_serialize::json;
15 use rustc_serialize::{Decodable, Encodable};
17 use std::collections::BTreeMap;
18 use std::io::prelude::*;
20 use std::{f32, f64, i64, u64};
23 #[derive(RustcDecodable, Eq, PartialEq, Debug)]
29 fn test_decode_option_none() {
31 let obj: OptionData = json::decode(s).unwrap();
32 assert_eq!(obj, OptionData { opt: None });
36 fn test_decode_option_some() {
37 let s = "{ \"opt\": 10 }";
38 let obj: OptionData = json::decode(s).unwrap();
39 assert_eq!(obj, OptionData { opt: Some(10) });
43 fn test_decode_option_malformed() {
44 check_err::<OptionData>(
46 ExpectedError("Number".to_string(), "[]".to_string()),
48 check_err::<OptionData>(
50 ExpectedError("Number".to_string(), "false".to_string()),
54 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
57 Frog(string::String, isize),
60 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
64 c: Vec<string::String>,
67 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
72 fn mk_object(items: &[(string::String, Json)]) -> Json {
73 let mut d = BTreeMap::new();
77 (ref key, ref value) => {
78 d.insert((*key).clone(), (*value).clone());
87 fn test_from_str_trait() {
89 assert!(s.parse::<Json>().unwrap() == s.parse().unwrap());
93 fn test_write_null() {
94 assert_eq!(Null.to_string(), "null");
95 assert_eq!(Null.pretty().to_string(), "null");
100 assert_eq!(U64(0).to_string(), "0");
101 assert_eq!(U64(0).pretty().to_string(), "0");
103 assert_eq!(U64(1234).to_string(), "1234");
104 assert_eq!(U64(1234).pretty().to_string(), "1234");
106 assert_eq!(I64(-5678).to_string(), "-5678");
107 assert_eq!(I64(-5678).pretty().to_string(), "-5678");
109 assert_eq!(U64(7650007200025252000).to_string(), "7650007200025252000");
110 assert_eq!(U64(7650007200025252000).pretty().to_string(), "7650007200025252000");
114 fn test_write_f64() {
115 assert_eq!(F64(3.0).to_string(), "3.0");
116 assert_eq!(F64(3.0).pretty().to_string(), "3.0");
118 assert_eq!(F64(3.1).to_string(), "3.1");
119 assert_eq!(F64(3.1).pretty().to_string(), "3.1");
121 assert_eq!(F64(-1.5).to_string(), "-1.5");
122 assert_eq!(F64(-1.5).pretty().to_string(), "-1.5");
124 assert_eq!(F64(0.5).to_string(), "0.5");
125 assert_eq!(F64(0.5).pretty().to_string(), "0.5");
127 assert_eq!(F64(f64::NAN).to_string(), "null");
128 assert_eq!(F64(f64::NAN).pretty().to_string(), "null");
130 assert_eq!(F64(f64::INFINITY).to_string(), "null");
131 assert_eq!(F64(f64::INFINITY).pretty().to_string(), "null");
133 assert_eq!(F64(f64::NEG_INFINITY).to_string(), "null");
134 assert_eq!(F64(f64::NEG_INFINITY).pretty().to_string(), "null");
138 fn test_write_str() {
139 assert_eq!(String("".to_string()).to_string(), "\"\"");
140 assert_eq!(String("".to_string()).pretty().to_string(), "\"\"");
142 assert_eq!(String("homura".to_string()).to_string(), "\"homura\"");
143 assert_eq!(String("madoka".to_string()).pretty().to_string(), "\"madoka\"");
147 fn test_write_bool() {
148 assert_eq!(Boolean(true).to_string(), "true");
149 assert_eq!(Boolean(true).pretty().to_string(), "true");
151 assert_eq!(Boolean(false).to_string(), "false");
152 assert_eq!(Boolean(false).pretty().to_string(), "false");
156 fn test_write_array() {
157 assert_eq!(Array(vec![]).to_string(), "[]");
158 assert_eq!(Array(vec![]).pretty().to_string(), "[]");
160 assert_eq!(Array(vec![Boolean(true)]).to_string(), "[true]");
162 Array(vec![Boolean(true)]).pretty().to_string(),
169 let long_test_array =
170 Array(vec![Boolean(false), Null, Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
172 assert_eq!(long_test_array.to_string(), "[false,null,[\"foo\\nbar\",3.5]]");
174 long_test_array.pretty().to_string(),
188 fn test_write_object() {
189 assert_eq!(mk_object(&[]).to_string(), "{}");
190 assert_eq!(mk_object(&[]).pretty().to_string(), "{}");
192 assert_eq!(mk_object(&[("a".to_string(), Boolean(true))]).to_string(), "{\"a\":true}");
194 mk_object(&[("a".to_string(), Boolean(true))]).pretty().to_string(),
201 let complex_obj = mk_object(&[(
204 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
205 mk_object(&[("d".to_string(), String("".to_string()))]),
210 complex_obj.to_string(),
219 complex_obj.pretty().to_string(),
224 \"c\": \"\\f\\r\"\n \
234 ("a".to_string(), Boolean(true)),
238 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
239 mk_object(&[("d".to_string(), String("".to_string()))]),
244 // We can't compare the strings directly because the object fields be
245 // printed in a different order.
246 assert_eq!(a.clone(), a.to_string().parse().unwrap());
247 assert_eq!(a.clone(), a.pretty().to_string().parse().unwrap());
251 fn test_write_enum() {
253 assert_eq!(json::as_json(&animal).to_string(), "\"Dog\"");
254 assert_eq!(json::as_pretty_json(&animal).to_string(), "\"Dog\"");
256 let animal = Frog("Henry".to_string(), 349);
258 json::as_json(&animal).to_string(),
259 "{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}"
262 json::as_pretty_json(&animal).to_string(),
264 \"variant\": \"Frog\",\n \
273 macro_rules! check_encoder_for_simple {
274 ($value:expr, $expected:expr) => {{
275 let s = json::as_json(&$value).to_string();
276 assert_eq!(s, $expected);
278 let s = json::as_pretty_json(&$value).to_string();
279 assert_eq!(s, $expected);
284 fn test_write_some() {
285 check_encoder_for_simple!(Some("jodhpurs".to_string()), "\"jodhpurs\"");
289 fn test_write_none() {
290 check_encoder_for_simple!(None::<string::String>, "null");
294 fn test_write_char() {
295 check_encoder_for_simple!('a', "\"a\"");
296 check_encoder_for_simple!('\t', "\"\\t\"");
297 check_encoder_for_simple!('\u{0000}', "\"\\u0000\"");
298 check_encoder_for_simple!('\u{001b}', "\"\\u001b\"");
299 check_encoder_for_simple!('\u{007f}', "\"\\u007f\"");
300 check_encoder_for_simple!('\u{00a0}', "\"\u{00a0}\"");
301 check_encoder_for_simple!('\u{abcd}', "\"\u{abcd}\"");
302 check_encoder_for_simple!('\u{10ffff}', "\"\u{10ffff}\"");
306 fn test_trailing_characters() {
307 assert_eq!(from_str("nulla"), Err(SyntaxError(TrailingCharacters, 1, 5)));
308 assert_eq!(from_str("truea"), Err(SyntaxError(TrailingCharacters, 1, 5)));
309 assert_eq!(from_str("falsea"), Err(SyntaxError(TrailingCharacters, 1, 6)));
310 assert_eq!(from_str("1a"), Err(SyntaxError(TrailingCharacters, 1, 2)));
311 assert_eq!(from_str("[]a"), Err(SyntaxError(TrailingCharacters, 1, 3)));
312 assert_eq!(from_str("{}a"), Err(SyntaxError(TrailingCharacters, 1, 3)));
316 fn test_read_identifiers() {
317 assert_eq!(from_str("n"), Err(SyntaxError(InvalidSyntax, 1, 2)));
318 assert_eq!(from_str("nul"), Err(SyntaxError(InvalidSyntax, 1, 4)));
319 assert_eq!(from_str("t"), Err(SyntaxError(InvalidSyntax, 1, 2)));
320 assert_eq!(from_str("truz"), Err(SyntaxError(InvalidSyntax, 1, 4)));
321 assert_eq!(from_str("f"), Err(SyntaxError(InvalidSyntax, 1, 2)));
322 assert_eq!(from_str("faz"), Err(SyntaxError(InvalidSyntax, 1, 3)));
324 assert_eq!(from_str("null"), Ok(Null));
325 assert_eq!(from_str("true"), Ok(Boolean(true)));
326 assert_eq!(from_str("false"), Ok(Boolean(false)));
327 assert_eq!(from_str(" null "), Ok(Null));
328 assert_eq!(from_str(" true "), Ok(Boolean(true)));
329 assert_eq!(from_str(" false "), Ok(Boolean(false)));
333 fn test_decode_identifiers() {
334 let v: () = json::decode("null").unwrap();
337 let v: bool = json::decode("true").unwrap();
340 let v: bool = json::decode("false").unwrap();
341 assert_eq!(v, false);
345 fn test_read_number() {
346 assert_eq!(from_str("+"), Err(SyntaxError(InvalidSyntax, 1, 1)));
347 assert_eq!(from_str("."), Err(SyntaxError(InvalidSyntax, 1, 1)));
348 assert_eq!(from_str("NaN"), Err(SyntaxError(InvalidSyntax, 1, 1)));
349 assert_eq!(from_str("-"), Err(SyntaxError(InvalidNumber, 1, 2)));
350 assert_eq!(from_str("00"), Err(SyntaxError(InvalidNumber, 1, 2)));
351 assert_eq!(from_str("1."), Err(SyntaxError(InvalidNumber, 1, 3)));
352 assert_eq!(from_str("1e"), Err(SyntaxError(InvalidNumber, 1, 3)));
353 assert_eq!(from_str("1e+"), Err(SyntaxError(InvalidNumber, 1, 4)));
355 assert_eq!(from_str("18446744073709551616"), Err(SyntaxError(InvalidNumber, 1, 20)));
356 assert_eq!(from_str("-9223372036854775809"), Err(SyntaxError(InvalidNumber, 1, 21)));
358 assert_eq!(from_str("3"), Ok(U64(3)));
359 assert_eq!(from_str("3.1"), Ok(F64(3.1)));
360 assert_eq!(from_str("-1.2"), Ok(F64(-1.2)));
361 assert_eq!(from_str("0.4"), Ok(F64(0.4)));
362 assert_eq!(from_str("0.4e5"), Ok(F64(0.4e5)));
363 assert_eq!(from_str("0.4e+15"), Ok(F64(0.4e15)));
364 assert_eq!(from_str("0.4e-01"), Ok(F64(0.4e-01)));
365 assert_eq!(from_str(" 3 "), Ok(U64(3)));
367 assert_eq!(from_str("-9223372036854775808"), Ok(I64(i64::MIN)));
368 assert_eq!(from_str("9223372036854775807"), Ok(U64(i64::MAX as u64)));
369 assert_eq!(from_str("18446744073709551615"), Ok(U64(u64::MAX)));
373 fn test_decode_numbers() {
374 let v: f64 = json::decode("3").unwrap();
377 let v: f64 = json::decode("3.1").unwrap();
380 let v: f64 = json::decode("-1.2").unwrap();
383 let v: f64 = json::decode("0.4").unwrap();
386 let v: f64 = json::decode("0.4e5").unwrap();
387 assert_eq!(v, 0.4e5);
389 let v: f64 = json::decode("0.4e15").unwrap();
390 assert_eq!(v, 0.4e15);
392 let v: f64 = json::decode("0.4e-01").unwrap();
393 assert_eq!(v, 0.4e-01);
395 let v: u64 = json::decode("0").unwrap();
398 let v: u64 = json::decode("18446744073709551615").unwrap();
399 assert_eq!(v, u64::MAX);
401 let v: i64 = json::decode("-9223372036854775808").unwrap();
402 assert_eq!(v, i64::MIN);
404 let v: i64 = json::decode("9223372036854775807").unwrap();
405 assert_eq!(v, i64::MAX);
407 let res: DecodeResult<i64> = json::decode("765.25");
408 assert_eq!(res, Err(ExpectedError("Integer".to_string(), "765.25".to_string())));
413 assert_eq!(from_str("\""), Err(SyntaxError(EOFWhileParsingString, 1, 2)));
414 assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
416 assert_eq!(from_str("\"\""), Ok(String("".to_string())));
417 assert_eq!(from_str("\"foo\""), Ok(String("foo".to_string())));
418 assert_eq!(from_str("\"\\\"\""), Ok(String("\"".to_string())));
419 assert_eq!(from_str("\"\\b\""), Ok(String("\x08".to_string())));
420 assert_eq!(from_str("\"\\n\""), Ok(String("\n".to_string())));
421 assert_eq!(from_str("\"\\r\""), Ok(String("\r".to_string())));
422 assert_eq!(from_str("\"\\t\""), Ok(String("\t".to_string())));
423 assert_eq!(from_str(" \"foo\" "), Ok(String("foo".to_string())));
424 assert_eq!(from_str("\"\\u12ab\""), Ok(String("\u{12ab}".to_string())));
425 assert_eq!(from_str("\"\\uAB12\""), Ok(String("\u{AB12}".to_string())));
429 fn test_decode_str() {
438 ("\"\\u12ab\"", "\u{12ab}"),
439 ("\"\\uAB12\"", "\u{AB12}"),
443 let v: string::String = json::decode(i).unwrap();
449 fn test_read_array() {
450 assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
451 assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
452 assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
453 assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
454 assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
456 assert_eq!(from_str("[]"), Ok(Array(vec![])));
457 assert_eq!(from_str("[ ]"), Ok(Array(vec![])));
458 assert_eq!(from_str("[true]"), Ok(Array(vec![Boolean(true)])));
459 assert_eq!(from_str("[ false ]"), Ok(Array(vec![Boolean(false)])));
460 assert_eq!(from_str("[null]"), Ok(Array(vec![Null])));
461 assert_eq!(from_str("[3, 1]"), Ok(Array(vec![U64(3), U64(1)])));
462 assert_eq!(from_str("\n[3, 2]\n"), Ok(Array(vec![U64(3), U64(2)])));
463 assert_eq!(from_str("[2, [4, 1]]"), Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
467 fn test_decode_array() {
468 let v: Vec<()> = json::decode("[]").unwrap();
471 let v: Vec<()> = json::decode("[null]").unwrap();
474 let v: Vec<bool> = json::decode("[true]").unwrap();
475 assert_eq!(v, [true]);
477 let v: Vec<isize> = json::decode("[3, 1]").unwrap();
478 assert_eq!(v, [3, 1]);
480 let v: Vec<Vec<usize>> = json::decode("[[3], [1, 2]]").unwrap();
481 assert_eq!(v, [vec![3], vec![1, 2]]);
485 fn test_decode_tuple() {
486 let t: (usize, usize, usize) = json::decode("[1, 2, 3]").unwrap();
487 assert_eq!(t, (1, 2, 3));
489 let t: (usize, string::String) = json::decode("[1, \"two\"]").unwrap();
490 assert_eq!(t, (1, "two".to_string()));
494 fn test_decode_tuple_malformed_types() {
495 assert!(json::decode::<(usize, string::String)>("[1, 2]").is_err());
499 fn test_decode_tuple_malformed_length() {
500 assert!(json::decode::<(usize, usize)>("[1, 2, 3]").is_err());
504 fn test_read_object() {
505 assert_eq!(from_str("{"), Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
506 assert_eq!(from_str("{ "), Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
507 assert_eq!(from_str("{1"), Err(SyntaxError(KeyMustBeAString, 1, 2)));
508 assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
509 assert_eq!(from_str("{\"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
510 assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
512 assert_eq!(from_str("{\"a\" 1"), Err(SyntaxError(ExpectedColon, 1, 6)));
513 assert_eq!(from_str("{\"a\":"), Err(SyntaxError(EOFWhileParsingValue, 1, 6)));
514 assert_eq!(from_str("{\"a\":1"), Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
515 assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax, 1, 8)));
516 assert_eq!(from_str("{\"a\":1,"), Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
518 assert_eq!(from_str("{}").unwrap(), mk_object(&[]));
519 assert_eq!(from_str("{\"a\": 3}").unwrap(), mk_object(&[("a".to_string(), U64(3))]));
522 from_str("{ \"a\": null, \"b\" : true }").unwrap(),
523 mk_object(&[("a".to_string(), Null), ("b".to_string(), Boolean(true))])
526 from_str("\n{ \"a\": null, \"b\" : true }\n").unwrap(),
527 mk_object(&[("a".to_string(), Null), ("b".to_string(), Boolean(true))])
530 from_str("{\"a\" : 1.0 ,\"b\": [ true ]}").unwrap(),
531 mk_object(&[("a".to_string(), F64(1.0)), ("b".to_string(), Array(vec![Boolean(true)]))])
540 { \"c\": {\"d\": null} } \
546 ("a".to_string(), F64(1.0)),
551 String("foo\nbar".to_string()),
552 mk_object(&[("c".to_string(), mk_object(&[("d".to_string(), Null)]))])
560 fn test_decode_struct() {
563 { \"a\": null, \"b\": 2, \"c\": [\"abc\", \"xyz\"] }
567 let v: Outer = json::decode(s).unwrap();
570 Outer { inner: vec![Inner { a: (), b: 2, c: vec!["abc".to_string(), "xyz".to_string()] }] }
574 #[derive(RustcDecodable)]
580 fn test_decode_struct_with_nan() {
581 let s = "{\"f\":null,\"a\":[null,123]}";
582 let obj: FloatStruct = json::decode(s).unwrap();
583 assert!(obj.f.is_nan());
584 assert!(obj.a[0].is_nan());
585 assert_eq!(obj.a[1], 123f64);
589 fn test_decode_option() {
590 let value: Option<string::String> = json::decode("null").unwrap();
591 assert_eq!(value, None);
593 let value: Option<string::String> = json::decode("\"jodhpurs\"").unwrap();
594 assert_eq!(value, Some("jodhpurs".to_string()));
598 fn test_decode_enum() {
599 let value: Animal = json::decode("\"Dog\"").unwrap();
600 assert_eq!(value, Dog);
602 let s = "{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}";
603 let value: Animal = json::decode(s).unwrap();
604 assert_eq!(value, Frog("Henry".to_string(), 349));
608 fn test_decode_map() {
609 let s = "{\"a\": \"Dog\", \"b\": {\"variant\":\"Frog\",\
610 \"fields\":[\"Henry\", 349]}}";
611 let mut map: BTreeMap<string::String, Animal> = json::decode(s).unwrap();
613 assert_eq!(map.remove(&"a".to_string()), Some(Dog));
614 assert_eq!(map.remove(&"b".to_string()), Some(Frog("Henry".to_string(), 349)));
618 fn test_multiline_errors() {
619 assert_eq!(from_str("{\n \"foo\":\n \"bar\""), Err(SyntaxError(EOFWhileParsingObject, 3, 8)));
622 #[derive(RustcDecodable)]
624 struct DecodeStruct {
628 w: Vec<DecodeStruct>,
630 #[derive(RustcDecodable)]
635 fn check_err<T: Decodable>(to_parse: &'static str, expected: DecoderError) {
636 let res: DecodeResult<T> = match from_str(to_parse) {
637 Err(e) => Err(ParseError(e)),
638 Ok(json) => Decodable::decode(&mut Decoder::new(json)),
641 Ok(_) => panic!("`{:?}` parsed & decoded ok, expecting error `{:?}`", to_parse, expected),
642 Err(ParseError(e)) => panic!("`{:?}` is not valid json: {:?}", to_parse, e),
644 assert_eq!(e, expected);
649 fn test_decode_errors_struct() {
650 check_err::<DecodeStruct>("[]", ExpectedError("Object".to_string(), "[]".to_string()));
651 check_err::<DecodeStruct>(
652 "{\"x\": true, \"y\": true, \"z\": \"\", \"w\": []}",
653 ExpectedError("Number".to_string(), "true".to_string()),
655 check_err::<DecodeStruct>(
656 "{\"x\": 1, \"y\": [], \"z\": \"\", \"w\": []}",
657 ExpectedError("Boolean".to_string(), "[]".to_string()),
659 check_err::<DecodeStruct>(
660 "{\"x\": 1, \"y\": true, \"z\": {}, \"w\": []}",
661 ExpectedError("String".to_string(), "{}".to_string()),
663 check_err::<DecodeStruct>(
664 "{\"x\": 1, \"y\": true, \"z\": \"\", \"w\": null}",
665 ExpectedError("Array".to_string(), "null".to_string()),
667 check_err::<DecodeStruct>(
668 "{\"x\": 1, \"y\": true, \"z\": \"\"}",
669 MissingFieldError("w".to_string()),
673 fn test_decode_errors_enum() {
674 check_err::<DecodeEnum>("{}", MissingFieldError("variant".to_string()));
675 check_err::<DecodeEnum>(
677 ExpectedError("String".to_string(), "1".to_string()),
679 check_err::<DecodeEnum>("{\"variant\": \"A\"}", MissingFieldError("fields".to_string()));
680 check_err::<DecodeEnum>(
681 "{\"variant\": \"A\", \"fields\": null}",
682 ExpectedError("Array".to_string(), "null".to_string()),
684 check_err::<DecodeEnum>(
685 "{\"variant\": \"C\", \"fields\": []}",
686 UnknownVariantError("C".to_string()),
692 let json_value = from_str("{\"dog\" : \"cat\"}").unwrap();
693 let found_str = json_value.find("dog");
694 assert!(found_str.unwrap().as_string().unwrap() == "cat");
698 fn test_find_path() {
699 let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
700 let found_str = json_value.find_path(&["dog", "cat", "mouse"]);
701 assert!(found_str.unwrap().as_string().unwrap() == "cheese");
706 let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
707 let found_str = json_value.search("mouse").and_then(|j| j.as_string());
708 assert!(found_str.unwrap() == "cheese");
713 let json_value = from_str("{\"animals\":[\"dog\",\"cat\",\"mouse\"]}").unwrap();
714 let ref array = json_value["animals"];
715 assert_eq!(array[0].as_string().unwrap(), "dog");
716 assert_eq!(array[1].as_string().unwrap(), "cat");
717 assert_eq!(array[2].as_string().unwrap(), "mouse");
721 fn test_is_object() {
722 let json_value = from_str("{}").unwrap();
723 assert!(json_value.is_object());
727 fn test_as_object() {
728 let json_value = from_str("{}").unwrap();
729 let json_object = json_value.as_object();
730 assert!(json_object.is_some());
735 let json_value = from_str("[1, 2, 3]").unwrap();
736 assert!(json_value.is_array());
741 let json_value = from_str("[1, 2, 3]").unwrap();
742 let json_array = json_value.as_array();
743 let expected_length = 3;
744 assert!(json_array.is_some() && json_array.unwrap().len() == expected_length);
748 fn test_is_string() {
749 let json_value = from_str("\"dog\"").unwrap();
750 assert!(json_value.is_string());
754 fn test_as_string() {
755 let json_value = from_str("\"dog\"").unwrap();
756 let json_str = json_value.as_string();
757 let expected_str = "dog";
758 assert_eq!(json_str, Some(expected_str));
762 fn test_is_number() {
763 let json_value = from_str("12").unwrap();
764 assert!(json_value.is_number());
769 let json_value = from_str("-12").unwrap();
770 assert!(json_value.is_i64());
772 let json_value = from_str("12").unwrap();
773 assert!(!json_value.is_i64());
775 let json_value = from_str("12.0").unwrap();
776 assert!(!json_value.is_i64());
781 let json_value = from_str("12").unwrap();
782 assert!(json_value.is_u64());
784 let json_value = from_str("-12").unwrap();
785 assert!(!json_value.is_u64());
787 let json_value = from_str("12.0").unwrap();
788 assert!(!json_value.is_u64());
793 let json_value = from_str("12").unwrap();
794 assert!(!json_value.is_f64());
796 let json_value = from_str("-12").unwrap();
797 assert!(!json_value.is_f64());
799 let json_value = from_str("12.0").unwrap();
800 assert!(json_value.is_f64());
802 let json_value = from_str("-12.0").unwrap();
803 assert!(json_value.is_f64());
808 let json_value = from_str("-12").unwrap();
809 let json_num = json_value.as_i64();
810 assert_eq!(json_num, Some(-12));
815 let json_value = from_str("12").unwrap();
816 let json_num = json_value.as_u64();
817 assert_eq!(json_num, Some(12));
822 let json_value = from_str("12.0").unwrap();
823 let json_num = json_value.as_f64();
824 assert_eq!(json_num, Some(12f64));
828 fn test_is_boolean() {
829 let json_value = from_str("false").unwrap();
830 assert!(json_value.is_boolean());
834 fn test_as_boolean() {
835 let json_value = from_str("false").unwrap();
836 let json_bool = json_value.as_boolean();
837 let expected_bool = false;
838 assert!(json_bool.is_some() && json_bool.unwrap() == expected_bool);
843 let json_value = from_str("null").unwrap();
844 assert!(json_value.is_null());
849 let json_value = from_str("null").unwrap();
850 let json_null = json_value.as_null();
851 let expected_null = ();
852 assert!(json_null.is_some() && json_null.unwrap() == expected_null);
856 fn test_encode_hashmap_with_numeric_key() {
857 use std::collections::HashMap;
858 use std::str::from_utf8;
859 let mut hm: HashMap<usize, bool> = HashMap::new();
861 let mut mem_buf = Vec::new();
862 write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
863 let json_str = from_utf8(&mem_buf[..]).unwrap();
864 match from_str(json_str) {
865 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
866 _ => {} // it parsed and we are good to go
871 fn test_prettyencode_hashmap_with_numeric_key() {
872 use std::collections::HashMap;
873 use std::str::from_utf8;
874 let mut hm: HashMap<usize, bool> = HashMap::new();
876 let mut mem_buf = Vec::new();
877 write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
878 let json_str = from_utf8(&mem_buf[..]).unwrap();
879 match from_str(json_str) {
880 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
881 _ => {} // it parsed and we are good to go
886 fn test_prettyencoder_indent_level_param() {
887 use std::collections::BTreeMap;
888 use std::str::from_utf8;
890 let mut tree = BTreeMap::new();
892 tree.insert("hello".to_string(), String("guten tag".to_string()));
893 tree.insert("goodbye".to_string(), String("sayonara".to_string()));
896 // The following layout below should look a lot like
897 // the pretty-printed JSON (indent * x)
900 String("greetings".to_string()), // 1x
901 Object(tree), // 1x + 2x + 2x + 1x
903 // End JSON array (7 lines)
906 // Helper function for counting indents
907 fn indents(source: &str) -> usize {
908 let trimmed = source.trim_start_matches(' ');
909 source.len() - trimmed.len()
912 // Test up to 4 spaces of indents (more?)
914 let mut writer = Vec::new();
915 write!(&mut writer, "{}", json::as_pretty_json(&json).indent(i)).unwrap();
917 let printed = from_utf8(&writer[..]).unwrap();
919 // Check for indents at each line
920 let lines: Vec<&str> = printed.lines().collect();
921 assert_eq!(lines.len(), 7); // JSON should be 7 lines
923 assert_eq!(indents(lines[0]), 0 * i); // [
924 assert_eq!(indents(lines[1]), 1 * i); // "greetings",
925 assert_eq!(indents(lines[2]), 1 * i); // {
926 assert_eq!(indents(lines[3]), 2 * i); // "hello": "guten tag",
927 assert_eq!(indents(lines[4]), 2 * i); // "goodbye": "sayonara"
928 assert_eq!(indents(lines[5]), 1 * i); // },
929 assert_eq!(indents(lines[6]), 0 * i); // ]
931 // Finally, test that the pretty-printed JSON is valid
932 from_str(printed).ok().expect("Pretty-printed JSON is invalid!");
937 fn test_hashmap_with_enum_key() {
938 use std::collections::HashMap;
939 #[derive(RustcEncodable, Eq, Hash, PartialEq, RustcDecodable, Debug)]
945 let mut map = HashMap::new();
946 map.insert(Enum::Foo, 0);
947 let result = json::encode(&map).unwrap();
948 assert_eq!(&result[..], r#"{"Foo":0}"#);
949 let decoded: HashMap<Enum, _> = json::decode(&result).unwrap();
950 assert_eq!(map, decoded);
954 fn test_hashmap_with_numeric_key_can_handle_double_quote_delimited_key() {
955 use std::collections::HashMap;
956 let json_str = "{\"1\":true}";
957 let json_obj = match from_str(json_str) {
958 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
961 let mut decoder = Decoder::new(json_obj);
962 let _hm: HashMap<usize, bool> = Decodable::decode(&mut decoder).unwrap();
966 fn test_hashmap_with_numeric_key_will_error_with_string_keys() {
967 use std::collections::HashMap;
968 let json_str = "{\"a\":true}";
969 let json_obj = match from_str(json_str) {
970 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
973 let mut decoder = Decoder::new(json_obj);
974 let result: Result<HashMap<usize, bool>, DecoderError> = Decodable::decode(&mut decoder);
975 assert_eq!(result, Err(ExpectedError("Number".to_string(), "a".to_string())));
978 fn assert_stream_equal(src: &str, expected: Vec<(JsonEvent, Vec<StackElement<'_>>)>) {
979 let mut parser = Parser::new(src.chars());
982 let evt = match parser.next() {
988 let (ref expected_evt, ref expected_stack) = expected[i];
989 if !parser.stack().is_equal_to(expected_stack) {
990 panic!("Parser stack is not equal to {:?}", expected_stack);
992 assert_eq!(&evt, expected_evt);
997 fn test_streaming_parser() {
999 r#"{ "foo":"bar", "array" : [0, 1, 2, 3, 4, 5], "idents":[null,true,false]}"#,
1001 (ObjectStart, vec![]),
1002 (StringValue("bar".to_string()), vec![StackElement::Key("foo")]),
1003 (ArrayStart, vec![StackElement::Key("array")]),
1004 (U64Value(0), vec![StackElement::Key("array"), StackElement::Index(0)]),
1005 (U64Value(1), vec![StackElement::Key("array"), StackElement::Index(1)]),
1006 (U64Value(2), vec![StackElement::Key("array"), StackElement::Index(2)]),
1007 (U64Value(3), vec![StackElement::Key("array"), StackElement::Index(3)]),
1008 (U64Value(4), vec![StackElement::Key("array"), StackElement::Index(4)]),
1009 (U64Value(5), vec![StackElement::Key("array"), StackElement::Index(5)]),
1010 (ArrayEnd, vec![StackElement::Key("array")]),
1011 (ArrayStart, vec![StackElement::Key("idents")]),
1012 (NullValue, vec![StackElement::Key("idents"), StackElement::Index(0)]),
1013 (BooleanValue(true), vec![StackElement::Key("idents"), StackElement::Index(1)]),
1014 (BooleanValue(false), vec![StackElement::Key("idents"), StackElement::Index(2)]),
1015 (ArrayEnd, vec![StackElement::Key("idents")]),
1016 (ObjectEnd, vec![]),
1020 fn last_event(src: &str) -> JsonEvent {
1021 let mut parser = Parser::new(src.chars());
1022 let mut evt = NullValue;
1024 evt = match parser.next() {
1032 fn test_read_object_streaming() {
1033 assert_eq!(last_event("{ "), Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
1034 assert_eq!(last_event("{1"), Error(SyntaxError(KeyMustBeAString, 1, 2)));
1035 assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
1036 assert_eq!(last_event("{\"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
1037 assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
1039 assert_eq!(last_event("{\"a\" 1"), Error(SyntaxError(ExpectedColon, 1, 6)));
1040 assert_eq!(last_event("{\"a\":"), Error(SyntaxError(EOFWhileParsingValue, 1, 6)));
1041 assert_eq!(last_event("{\"a\":1"), Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
1042 assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax, 1, 8)));
1043 assert_eq!(last_event("{\"a\":1,"), Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
1044 assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
1046 assert_stream_equal("{}", vec![(ObjectStart, vec![]), (ObjectEnd, vec![])]);
1047 assert_stream_equal(
1050 (ObjectStart, vec![]),
1051 (U64Value(3), vec![StackElement::Key("a")]),
1052 (ObjectEnd, vec![]),
1055 assert_stream_equal(
1056 "{ \"a\": null, \"b\" : true }",
1058 (ObjectStart, vec![]),
1059 (NullValue, vec![StackElement::Key("a")]),
1060 (BooleanValue(true), vec![StackElement::Key("b")]),
1061 (ObjectEnd, vec![]),
1064 assert_stream_equal(
1065 "{\"a\" : 1.0 ,\"b\": [ true ]}",
1067 (ObjectStart, vec![]),
1068 (F64Value(1.0), vec![StackElement::Key("a")]),
1069 (ArrayStart, vec![StackElement::Key("b")]),
1070 (BooleanValue(true), vec![StackElement::Key("b"), StackElement::Index(0)]),
1071 (ArrayEnd, vec![StackElement::Key("b")]),
1072 (ObjectEnd, vec![]),
1075 assert_stream_equal(
1081 { "c": {"d": null} }
1085 (ObjectStart, vec![]),
1086 (F64Value(1.0), vec![StackElement::Key("a")]),
1087 (ArrayStart, vec![StackElement::Key("b")]),
1088 (BooleanValue(true), vec![StackElement::Key("b"), StackElement::Index(0)]),
1090 StringValue("foo\nbar".to_string()),
1091 vec![StackElement::Key("b"), StackElement::Index(1)],
1093 (ObjectStart, vec![StackElement::Key("b"), StackElement::Index(2)]),
1096 vec![StackElement::Key("b"), StackElement::Index(2), StackElement::Key("c")],
1101 StackElement::Key("b"),
1102 StackElement::Index(2),
1103 StackElement::Key("c"),
1104 StackElement::Key("d"),
1109 vec![StackElement::Key("b"), StackElement::Index(2), StackElement::Key("c")],
1111 (ObjectEnd, vec![StackElement::Key("b"), StackElement::Index(2)]),
1112 (ArrayEnd, vec![StackElement::Key("b")]),
1113 (ObjectEnd, vec![]),
1118 fn test_read_array_streaming() {
1119 assert_stream_equal("[]", vec![(ArrayStart, vec![]), (ArrayEnd, vec![])]);
1120 assert_stream_equal("[ ]", vec![(ArrayStart, vec![]), (ArrayEnd, vec![])]);
1121 assert_stream_equal(
1124 (ArrayStart, vec![]),
1125 (BooleanValue(true), vec![StackElement::Index(0)]),
1129 assert_stream_equal(
1132 (ArrayStart, vec![]),
1133 (BooleanValue(false), vec![StackElement::Index(0)]),
1137 assert_stream_equal(
1139 vec![(ArrayStart, vec![]), (NullValue, vec![StackElement::Index(0)]), (ArrayEnd, vec![])],
1141 assert_stream_equal(
1144 (ArrayStart, vec![]),
1145 (U64Value(3), vec![StackElement::Index(0)]),
1146 (U64Value(1), vec![StackElement::Index(1)]),
1150 assert_stream_equal(
1153 (ArrayStart, vec![]),
1154 (U64Value(3), vec![StackElement::Index(0)]),
1155 (U64Value(2), vec![StackElement::Index(1)]),
1159 assert_stream_equal(
1162 (ArrayStart, vec![]),
1163 (U64Value(2), vec![StackElement::Index(0)]),
1164 (ArrayStart, vec![StackElement::Index(1)]),
1165 (U64Value(4), vec![StackElement::Index(1), StackElement::Index(0)]),
1166 (U64Value(1), vec![StackElement::Index(1), StackElement::Index(1)]),
1167 (ArrayEnd, vec![StackElement::Index(1)]),
1172 assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1, 2)));
1174 assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
1175 assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
1176 assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
1177 assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
1178 assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
1181 fn test_trailing_characters_streaming() {
1182 assert_eq!(last_event("nulla"), Error(SyntaxError(TrailingCharacters, 1, 5)));
1183 assert_eq!(last_event("truea"), Error(SyntaxError(TrailingCharacters, 1, 5)));
1184 assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
1185 assert_eq!(last_event("1a"), Error(SyntaxError(TrailingCharacters, 1, 2)));
1186 assert_eq!(last_event("[]a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
1187 assert_eq!(last_event("{}a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
1190 fn test_read_identifiers_streaming() {
1191 assert_eq!(Parser::new("null".chars()).next(), Some(NullValue));
1192 assert_eq!(Parser::new("true".chars()).next(), Some(BooleanValue(true)));
1193 assert_eq!(Parser::new("false".chars()).next(), Some(BooleanValue(false)));
1195 assert_eq!(last_event("n"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1196 assert_eq!(last_event("nul"), Error(SyntaxError(InvalidSyntax, 1, 4)));
1197 assert_eq!(last_event("t"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1198 assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
1199 assert_eq!(last_event("f"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1200 assert_eq!(last_event("faz"), Error(SyntaxError(InvalidSyntax, 1, 3)));
1206 use std::collections::{BTreeMap, HashMap};
1208 let array2 = Array(vec![U64(1), U64(2)]);
1209 let array3 = Array(vec![U64(1), U64(2), U64(3)]);
1211 let mut tree_map = BTreeMap::new();
1212 tree_map.insert("a".to_string(), U64(1));
1213 tree_map.insert("b".to_string(), U64(2));
1217 assert_eq!(array2.to_json(), array2);
1218 assert_eq!(object.to_json(), object);
1219 assert_eq!(3_isize.to_json(), I64(3));
1220 assert_eq!(4_i8.to_json(), I64(4));
1221 assert_eq!(5_i16.to_json(), I64(5));
1222 assert_eq!(6_i32.to_json(), I64(6));
1223 assert_eq!(7_i64.to_json(), I64(7));
1224 assert_eq!(8_usize.to_json(), U64(8));
1225 assert_eq!(9_u8.to_json(), U64(9));
1226 assert_eq!(10_u16.to_json(), U64(10));
1227 assert_eq!(11_u32.to_json(), U64(11));
1228 assert_eq!(12_u64.to_json(), U64(12));
1229 assert_eq!(13.0_f32.to_json(), F64(13.0_f64));
1230 assert_eq!(14.0_f64.to_json(), F64(14.0_f64));
1231 assert_eq!(().to_json(), Null);
1232 assert_eq!(f32::INFINITY.to_json(), Null);
1233 assert_eq!(f64::NAN.to_json(), Null);
1234 assert_eq!(true.to_json(), Boolean(true));
1235 assert_eq!(false.to_json(), Boolean(false));
1236 assert_eq!("abc".to_json(), String("abc".to_string()));
1237 assert_eq!("abc".to_string().to_json(), String("abc".to_string()));
1238 assert_eq!((1_usize, 2_usize).to_json(), array2);
1239 assert_eq!((1_usize, 2_usize, 3_usize).to_json(), array3);
1240 assert_eq!([1_usize, 2_usize].to_json(), array2);
1241 assert_eq!((&[1_usize, 2_usize, 3_usize]).to_json(), array3);
1242 assert_eq!((vec![1_usize, 2_usize]).to_json(), array2);
1243 assert_eq!(vec![1_usize, 2_usize, 3_usize].to_json(), array3);
1244 let mut tree_map = BTreeMap::new();
1245 tree_map.insert("a".to_string(), 1 as usize);
1246 tree_map.insert("b".to_string(), 2);
1247 assert_eq!(tree_map.to_json(), object);
1248 let mut hash_map = HashMap::new();
1249 hash_map.insert("a".to_string(), 1 as usize);
1250 hash_map.insert("b".to_string(), 2);
1251 assert_eq!(hash_map.to_json(), object);
1252 assert_eq!(Some(15).to_json(), I64(15));
1253 assert_eq!(Some(15 as usize).to_json(), U64(15));
1254 assert_eq!(None::<isize>.to_json(), Null);
1258 fn test_encode_hashmap_with_arbitrary_key() {
1259 use std::collections::HashMap;
1260 #[derive(PartialEq, Eq, Hash, RustcEncodable)]
1261 struct ArbitraryType(usize);
1262 let mut hm: HashMap<ArbitraryType, bool> = HashMap::new();
1263 hm.insert(ArbitraryType(1), true);
1264 let mut mem_buf = string::String::new();
1265 let mut encoder = Encoder::new(&mut mem_buf);
1266 let result = hm.encode(&mut encoder);
1267 match result.unwrap_err() {
1268 EncoderError::BadHashmapKey => (),
1269 _ => panic!("expected bad hash map key"),