1 #[allow(unused_extern_crates)]
2 extern crate serialize as rustc_serialize;
4 use rustc_serialize::{Encodable, Decodable};
5 use rustc_serialize::json;
7 use json::ErrorCode::*;
8 use json::ParserError::*;
9 use json::DecoderError::*;
10 use json::JsonEvent::*;
11 use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
12 Decoder, Encoder, EncoderError};
15 use std::{i64, u64, f32, f64};
16 use std::io::prelude::*;
17 use std::collections::BTreeMap;
20 #[derive(RustcDecodable, Eq, PartialEq, Debug)]
26 fn test_decode_option_none() {
28 let obj: OptionData = json::decode(s).unwrap();
29 assert_eq!(obj, OptionData { opt: None });
33 fn test_decode_option_some() {
34 let s = "{ \"opt\": 10 }";
35 let obj: OptionData = json::decode(s).unwrap();
36 assert_eq!(obj, OptionData { opt: Some(10) });
40 fn test_decode_option_malformed() {
41 check_err::<OptionData>("{ \"opt\": [] }",
42 ExpectedError("Number".to_string(), "[]".to_string()));
43 check_err::<OptionData>("{ \"opt\": false }",
44 ExpectedError("Number".to_string(), "false".to_string()));
47 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
50 Frog(string::String, isize)
53 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
57 c: Vec<string::String>,
60 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
65 fn mk_object(items: &[(string::String, Json)]) -> Json {
66 let mut d = BTreeMap::new();
70 (ref key, ref value) => { d.insert((*key).clone(), (*value).clone()); },
78 fn test_from_str_trait() {
80 assert!(s.parse::<Json>().unwrap() == s.parse().unwrap());
84 fn test_write_null() {
85 assert_eq!(Null.to_string(), "null");
86 assert_eq!(Null.pretty().to_string(), "null");
91 assert_eq!(U64(0).to_string(), "0");
92 assert_eq!(U64(0).pretty().to_string(), "0");
94 assert_eq!(U64(1234).to_string(), "1234");
95 assert_eq!(U64(1234).pretty().to_string(), "1234");
97 assert_eq!(I64(-5678).to_string(), "-5678");
98 assert_eq!(I64(-5678).pretty().to_string(), "-5678");
100 assert_eq!(U64(7650007200025252000).to_string(), "7650007200025252000");
101 assert_eq!(U64(7650007200025252000).pretty().to_string(), "7650007200025252000");
105 fn test_write_f64() {
106 assert_eq!(F64(3.0).to_string(), "3.0");
107 assert_eq!(F64(3.0).pretty().to_string(), "3.0");
109 assert_eq!(F64(3.1).to_string(), "3.1");
110 assert_eq!(F64(3.1).pretty().to_string(), "3.1");
112 assert_eq!(F64(-1.5).to_string(), "-1.5");
113 assert_eq!(F64(-1.5).pretty().to_string(), "-1.5");
115 assert_eq!(F64(0.5).to_string(), "0.5");
116 assert_eq!(F64(0.5).pretty().to_string(), "0.5");
118 assert_eq!(F64(f64::NAN).to_string(), "null");
119 assert_eq!(F64(f64::NAN).pretty().to_string(), "null");
121 assert_eq!(F64(f64::INFINITY).to_string(), "null");
122 assert_eq!(F64(f64::INFINITY).pretty().to_string(), "null");
124 assert_eq!(F64(f64::NEG_INFINITY).to_string(), "null");
125 assert_eq!(F64(f64::NEG_INFINITY).pretty().to_string(), "null");
129 fn test_write_str() {
130 assert_eq!(String("".to_string()).to_string(), "\"\"");
131 assert_eq!(String("".to_string()).pretty().to_string(), "\"\"");
133 assert_eq!(String("homura".to_string()).to_string(), "\"homura\"");
134 assert_eq!(String("madoka".to_string()).pretty().to_string(), "\"madoka\"");
138 fn test_write_bool() {
139 assert_eq!(Boolean(true).to_string(), "true");
140 assert_eq!(Boolean(true).pretty().to_string(), "true");
142 assert_eq!(Boolean(false).to_string(), "false");
143 assert_eq!(Boolean(false).pretty().to_string(), "false");
147 fn test_write_array() {
148 assert_eq!(Array(vec![]).to_string(), "[]");
149 assert_eq!(Array(vec![]).pretty().to_string(), "[]");
151 assert_eq!(Array(vec![Boolean(true)]).to_string(), "[true]");
153 Array(vec![Boolean(true)]).pretty().to_string(),
160 let long_test_array = Array(vec![
163 Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
165 assert_eq!(long_test_array.to_string(),
166 "[false,null,[\"foo\\nbar\",3.5]]");
168 long_test_array.pretty().to_string(),
182 fn test_write_object() {
183 assert_eq!(mk_object(&[]).to_string(), "{}");
184 assert_eq!(mk_object(&[]).pretty().to_string(), "{}");
188 ("a".to_string(), Boolean(true))
193 mk_object(&[("a".to_string(), Boolean(true))]).pretty().to_string(),
200 let complex_obj = mk_object(&[
201 ("b".to_string(), Array(vec![
202 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
203 mk_object(&[("d".to_string(), String("".to_string()))])
208 complex_obj.to_string(),
217 complex_obj.pretty().to_string(),
222 \"c\": \"\\f\\r\"\n \
232 ("a".to_string(), Boolean(true)),
233 ("b".to_string(), Array(vec![
234 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
235 mk_object(&[("d".to_string(), String("".to_string()))])
239 // We can't compare the strings directly because the object fields be
240 // printed in a different order.
241 assert_eq!(a.clone(), a.to_string().parse().unwrap());
242 assert_eq!(a.clone(), a.pretty().to_string().parse().unwrap());
246 fn test_write_enum() {
249 json::as_json(&animal).to_string(),
253 json::as_pretty_json(&animal).to_string(),
257 let animal = Frog("Henry".to_string(), 349);
259 json::as_json(&animal).to_string(),
260 "{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}"
263 json::as_pretty_json(&animal).to_string(),
265 \"variant\": \"Frog\",\n \
274 macro_rules! check_encoder_for_simple {
275 ($value:expr, $expected:expr) => ({
276 let s = json::as_json(&$value).to_string();
277 assert_eq!(s, $expected);
279 let s = json::as_pretty_json(&$value).to_string();
280 assert_eq!(s, $expected);
285 fn test_write_some() {
286 check_encoder_for_simple!(Some("jodhpurs".to_string()), "\"jodhpurs\"");
290 fn test_write_none() {
291 check_encoder_for_simple!(None::<string::String>, "null");
295 fn test_write_char() {
296 check_encoder_for_simple!('a', "\"a\"");
297 check_encoder_for_simple!('\t', "\"\\t\"");
298 check_encoder_for_simple!('\u{0000}', "\"\\u0000\"");
299 check_encoder_for_simple!('\u{001b}', "\"\\u001b\"");
300 check_encoder_for_simple!('\u{007f}', "\"\\u007f\"");
301 check_encoder_for_simple!('\u{00a0}', "\"\u{00a0}\"");
302 check_encoder_for_simple!('\u{abcd}', "\"\u{abcd}\"");
303 check_encoder_for_simple!('\u{10ffff}', "\"\u{10ffff}\"");
307 fn test_trailing_characters() {
308 assert_eq!(from_str("nulla"), Err(SyntaxError(TrailingCharacters, 1, 5)));
309 assert_eq!(from_str("truea"), Err(SyntaxError(TrailingCharacters, 1, 5)));
310 assert_eq!(from_str("falsea"), Err(SyntaxError(TrailingCharacters, 1, 6)));
311 assert_eq!(from_str("1a"), Err(SyntaxError(TrailingCharacters, 1, 2)));
312 assert_eq!(from_str("[]a"), Err(SyntaxError(TrailingCharacters, 1, 3)));
313 assert_eq!(from_str("{}a"), Err(SyntaxError(TrailingCharacters, 1, 3)));
317 fn test_read_identifiers() {
318 assert_eq!(from_str("n"), Err(SyntaxError(InvalidSyntax, 1, 2)));
319 assert_eq!(from_str("nul"), Err(SyntaxError(InvalidSyntax, 1, 4)));
320 assert_eq!(from_str("t"), Err(SyntaxError(InvalidSyntax, 1, 2)));
321 assert_eq!(from_str("truz"), Err(SyntaxError(InvalidSyntax, 1, 4)));
322 assert_eq!(from_str("f"), Err(SyntaxError(InvalidSyntax, 1, 2)));
323 assert_eq!(from_str("faz"), Err(SyntaxError(InvalidSyntax, 1, 3)));
325 assert_eq!(from_str("null"), Ok(Null));
326 assert_eq!(from_str("true"), Ok(Boolean(true)));
327 assert_eq!(from_str("false"), Ok(Boolean(false)));
328 assert_eq!(from_str(" null "), Ok(Null));
329 assert_eq!(from_str(" true "), Ok(Boolean(true)));
330 assert_eq!(from_str(" false "), Ok(Boolean(false)));
334 fn test_decode_identifiers() {
335 let v: () = json::decode("null").unwrap();
338 let v: bool = json::decode("true").unwrap();
341 let v: bool = json::decode("false").unwrap();
342 assert_eq!(v, false);
346 fn test_read_number() {
347 assert_eq!(from_str("+"), Err(SyntaxError(InvalidSyntax, 1, 1)));
348 assert_eq!(from_str("."), Err(SyntaxError(InvalidSyntax, 1, 1)));
349 assert_eq!(from_str("NaN"), Err(SyntaxError(InvalidSyntax, 1, 1)));
350 assert_eq!(from_str("-"), Err(SyntaxError(InvalidNumber, 1, 2)));
351 assert_eq!(from_str("00"), Err(SyntaxError(InvalidNumber, 1, 2)));
352 assert_eq!(from_str("1."), Err(SyntaxError(InvalidNumber, 1, 3)));
353 assert_eq!(from_str("1e"), Err(SyntaxError(InvalidNumber, 1, 3)));
354 assert_eq!(from_str("1e+"), Err(SyntaxError(InvalidNumber, 1, 4)));
356 assert_eq!(from_str("18446744073709551616"), Err(SyntaxError(InvalidNumber, 1, 20)));
357 assert_eq!(from_str("-9223372036854775809"), Err(SyntaxError(InvalidNumber, 1, 21)));
359 assert_eq!(from_str("3"), Ok(U64(3)));
360 assert_eq!(from_str("3.1"), Ok(F64(3.1)));
361 assert_eq!(from_str("-1.2"), Ok(F64(-1.2)));
362 assert_eq!(from_str("0.4"), Ok(F64(0.4)));
363 assert_eq!(from_str("0.4e5"), Ok(F64(0.4e5)));
364 assert_eq!(from_str("0.4e+15"), Ok(F64(0.4e15)));
365 assert_eq!(from_str("0.4e-01"), Ok(F64(0.4e-01)));
366 assert_eq!(from_str(" 3 "), Ok(U64(3)));
368 assert_eq!(from_str("-9223372036854775808"), Ok(I64(i64::MIN)));
369 assert_eq!(from_str("9223372036854775807"), Ok(U64(i64::MAX as u64)));
370 assert_eq!(from_str("18446744073709551615"), Ok(U64(u64::MAX)));
374 fn test_decode_numbers() {
375 let v: f64 = json::decode("3").unwrap();
378 let v: f64 = json::decode("3.1").unwrap();
381 let v: f64 = json::decode("-1.2").unwrap();
384 let v: f64 = json::decode("0.4").unwrap();
387 let v: f64 = json::decode("0.4e5").unwrap();
388 assert_eq!(v, 0.4e5);
390 let v: f64 = json::decode("0.4e15").unwrap();
391 assert_eq!(v, 0.4e15);
393 let v: f64 = json::decode("0.4e-01").unwrap();
394 assert_eq!(v, 0.4e-01);
396 let v: u64 = json::decode("0").unwrap();
399 let v: u64 = json::decode("18446744073709551615").unwrap();
400 assert_eq!(v, u64::MAX);
402 let v: i64 = json::decode("-9223372036854775808").unwrap();
403 assert_eq!(v, i64::MIN);
405 let v: i64 = json::decode("9223372036854775807").unwrap();
406 assert_eq!(v, i64::MAX);
408 let res: DecodeResult<i64> = json::decode("765.25");
409 assert_eq!(res, Err(ExpectedError("Integer".to_string(),
410 "765.25".to_string())));
415 assert_eq!(from_str("\""), Err(SyntaxError(EOFWhileParsingString, 1, 2)));
416 assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
418 assert_eq!(from_str("\"\""), Ok(String("".to_string())));
419 assert_eq!(from_str("\"foo\""), Ok(String("foo".to_string())));
420 assert_eq!(from_str("\"\\\"\""), Ok(String("\"".to_string())));
421 assert_eq!(from_str("\"\\b\""), Ok(String("\x08".to_string())));
422 assert_eq!(from_str("\"\\n\""), Ok(String("\n".to_string())));
423 assert_eq!(from_str("\"\\r\""), Ok(String("\r".to_string())));
424 assert_eq!(from_str("\"\\t\""), Ok(String("\t".to_string())));
425 assert_eq!(from_str(" \"foo\" "), Ok(String("foo".to_string())));
426 assert_eq!(from_str("\"\\u12ab\""), Ok(String("\u{12ab}".to_string())));
427 assert_eq!(from_str("\"\\uAB12\""), Ok(String("\u{AB12}".to_string())));
431 fn test_decode_str() {
432 let s = [("\"\"", ""),
439 ("\"\\u12ab\"", "\u{12ab}"),
440 ("\"\\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]"),
462 Ok(Array(vec![U64(3), U64(1)])));
463 assert_eq!(from_str("\n[3, 2]\n"),
464 Ok(Array(vec![U64(3), U64(2)])));
465 assert_eq!(from_str("[2, [4, 1]]"),
466 Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
470 fn test_decode_array() {
471 let v: Vec<()> = json::decode("[]").unwrap();
474 let v: Vec<()> = json::decode("[null]").unwrap();
477 let v: Vec<bool> = json::decode("[true]").unwrap();
478 assert_eq!(v, [true]);
480 let v: Vec<isize> = json::decode("[3, 1]").unwrap();
481 assert_eq!(v, [3, 1]);
483 let v: Vec<Vec<usize>> = json::decode("[[3], [1, 2]]").unwrap();
484 assert_eq!(v, [vec![3], vec![1, 2]]);
488 fn test_decode_tuple() {
489 let t: (usize, usize, usize) = json::decode("[1, 2, 3]").unwrap();
490 assert_eq!(t, (1, 2, 3));
492 let t: (usize, string::String) = json::decode("[1, \"two\"]").unwrap();
493 assert_eq!(t, (1, "two".to_string()));
497 fn test_decode_tuple_malformed_types() {
498 assert!(json::decode::<(usize, string::String)>("[1, 2]").is_err());
502 fn test_decode_tuple_malformed_length() {
503 assert!(json::decode::<(usize, usize)>("[1, 2, 3]").is_err());
507 fn test_read_object() {
508 assert_eq!(from_str("{"), Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
509 assert_eq!(from_str("{ "), Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
510 assert_eq!(from_str("{1"), Err(SyntaxError(KeyMustBeAString, 1, 2)));
511 assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
512 assert_eq!(from_str("{\"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
513 assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
515 assert_eq!(from_str("{\"a\" 1"), Err(SyntaxError(ExpectedColon, 1, 6)));
516 assert_eq!(from_str("{\"a\":"), Err(SyntaxError(EOFWhileParsingValue, 1, 6)));
517 assert_eq!(from_str("{\"a\":1"), Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
518 assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax, 1, 8)));
519 assert_eq!(from_str("{\"a\":1,"), Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
521 assert_eq!(from_str("{}").unwrap(), mk_object(&[]));
522 assert_eq!(from_str("{\"a\": 3}").unwrap(),
523 mk_object(&[("a".to_string(), U64(3))]));
526 "{ \"a\": null, \"b\" : true }").unwrap(),
528 ("a".to_string(), Null),
529 ("b".to_string(), Boolean(true))]));
530 assert_eq!(from_str("\n{ \"a\": null, \"b\" : true }\n").unwrap(),
532 ("a".to_string(), Null),
533 ("b".to_string(), Boolean(true))]));
535 "{\"a\" : 1.0 ,\"b\": [ true ]}").unwrap(),
537 ("a".to_string(), F64(1.0)),
538 ("b".to_string(), Array(vec![Boolean(true)]))
546 { \"c\": {\"d\": null} } \
550 ("a".to_string(), F64(1.0)),
551 ("b".to_string(), Array(vec![
553 String("foo\nbar".to_string()),
555 ("c".to_string(), mk_object(&[("d".to_string(), Null)]))
562 fn test_decode_struct() {
565 { \"a\": null, \"b\": 2, \"c\": [\"abc\", \"xyz\"] }
569 let v: Outer = json::decode(s).unwrap();
574 Inner { a: (), b: 2, c: vec!["abc".to_string(), "xyz".to_string()] }
580 #[derive(RustcDecodable)]
586 fn test_decode_struct_with_nan() {
587 let s = "{\"f\":null,\"a\":[null,123]}";
588 let obj: FloatStruct = json::decode(s).unwrap();
589 assert!(obj.f.is_nan());
590 assert!(obj.a[0].is_nan());
591 assert_eq!(obj.a[1], 123f64);
595 fn test_decode_option() {
596 let value: Option<string::String> = json::decode("null").unwrap();
597 assert_eq!(value, None);
599 let value: Option<string::String> = json::decode("\"jodhpurs\"").unwrap();
600 assert_eq!(value, Some("jodhpurs".to_string()));
604 fn test_decode_enum() {
605 let value: Animal = json::decode("\"Dog\"").unwrap();
606 assert_eq!(value, Dog);
608 let s = "{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}";
609 let value: Animal = json::decode(s).unwrap();
610 assert_eq!(value, Frog("Henry".to_string(), 349));
614 fn test_decode_map() {
615 let s = "{\"a\": \"Dog\", \"b\": {\"variant\":\"Frog\",\
616 \"fields\":[\"Henry\", 349]}}";
617 let mut map: BTreeMap<string::String, Animal> = json::decode(s).unwrap();
619 assert_eq!(map.remove(&"a".to_string()), Some(Dog));
620 assert_eq!(map.remove(&"b".to_string()), Some(Frog("Henry".to_string(), 349)));
624 fn test_multiline_errors() {
625 assert_eq!(from_str("{\n \"foo\":\n \"bar\""),
626 Err(SyntaxError(EOFWhileParsingObject, 3, 8)));
629 #[derive(RustcDecodable)]
631 struct DecodeStruct {
637 #[derive(RustcDecodable)]
642 fn check_err<T: Decodable>(to_parse: &'static str, expected: DecoderError) {
643 let res: DecodeResult<T> = match from_str(to_parse) {
644 Err(e) => Err(ParseError(e)),
645 Ok(json) => Decodable::decode(&mut Decoder::new(json))
648 Ok(_) => panic!("`{:?}` parsed & decoded ok, expecting error `{:?}`",
650 Err(ParseError(e)) => panic!("`{:?}` is not valid json: {:?}",
653 assert_eq!(e, expected);
658 fn test_decode_errors_struct() {
659 check_err::<DecodeStruct>("[]", ExpectedError("Object".to_string(), "[]".to_string()));
660 check_err::<DecodeStruct>("{\"x\": true, \"y\": true, \"z\": \"\", \"w\": []}",
661 ExpectedError("Number".to_string(), "true".to_string()));
662 check_err::<DecodeStruct>("{\"x\": 1, \"y\": [], \"z\": \"\", \"w\": []}",
663 ExpectedError("Boolean".to_string(), "[]".to_string()));
664 check_err::<DecodeStruct>("{\"x\": 1, \"y\": true, \"z\": {}, \"w\": []}",
665 ExpectedError("String".to_string(), "{}".to_string()));
666 check_err::<DecodeStruct>("{\"x\": 1, \"y\": true, \"z\": \"\", \"w\": null}",
667 ExpectedError("Array".to_string(), "null".to_string()));
668 check_err::<DecodeStruct>("{\"x\": 1, \"y\": true, \"z\": \"\"}",
669 MissingFieldError("w".to_string()));
672 fn test_decode_errors_enum() {
673 check_err::<DecodeEnum>("{}",
674 MissingFieldError("variant".to_string()));
675 check_err::<DecodeEnum>("{\"variant\": 1}",
676 ExpectedError("String".to_string(), "1".to_string()));
677 check_err::<DecodeEnum>("{\"variant\": \"A\"}",
678 MissingFieldError("fields".to_string()));
679 check_err::<DecodeEnum>("{\"variant\": \"A\", \"fields\": null}",
680 ExpectedError("Array".to_string(), "null".to_string()));
681 check_err::<DecodeEnum>("{\"variant\": \"C\", \"fields\": []}",
682 UnknownVariantError("C".to_string()));
687 let json_value = from_str("{\"dog\" : \"cat\"}").unwrap();
688 let found_str = json_value.find("dog");
689 assert!(found_str.unwrap().as_string().unwrap() == "cat");
694 let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
695 let found_str = json_value.find_path(&["dog", "cat", "mouse"]);
696 assert!(found_str.unwrap().as_string().unwrap() == "cheese");
701 let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
702 let found_str = json_value.search("mouse").and_then(|j| j.as_string());
703 assert!(found_str.unwrap() == "cheese");
708 let json_value = from_str("{\"animals\":[\"dog\",\"cat\",\"mouse\"]}").unwrap();
709 let ref array = json_value["animals"];
710 assert_eq!(array[0].as_string().unwrap(), "dog");
711 assert_eq!(array[1].as_string().unwrap(), "cat");
712 assert_eq!(array[2].as_string().unwrap(), "mouse");
717 let json_value = from_str("{}").unwrap();
718 assert!(json_value.is_object());
723 let json_value = from_str("{}").unwrap();
724 let json_object = json_value.as_object();
725 assert!(json_object.is_some());
730 let json_value = from_str("[1, 2, 3]").unwrap();
731 assert!(json_value.is_array());
736 let json_value = from_str("[1, 2, 3]").unwrap();
737 let json_array = json_value.as_array();
738 let expected_length = 3;
739 assert!(json_array.is_some() && json_array.unwrap().len() == expected_length);
744 let json_value = from_str("\"dog\"").unwrap();
745 assert!(json_value.is_string());
750 let json_value = from_str("\"dog\"").unwrap();
751 let json_str = json_value.as_string();
752 let expected_str = "dog";
753 assert_eq!(json_str, Some(expected_str));
758 let json_value = from_str("12").unwrap();
759 assert!(json_value.is_number());
764 let json_value = from_str("-12").unwrap();
765 assert!(json_value.is_i64());
767 let json_value = from_str("12").unwrap();
768 assert!(!json_value.is_i64());
770 let json_value = from_str("12.0").unwrap();
771 assert!(!json_value.is_i64());
776 let json_value = from_str("12").unwrap();
777 assert!(json_value.is_u64());
779 let json_value = from_str("-12").unwrap();
780 assert!(!json_value.is_u64());
782 let json_value = from_str("12.0").unwrap();
783 assert!(!json_value.is_u64());
788 let json_value = from_str("12").unwrap();
789 assert!(!json_value.is_f64());
791 let json_value = from_str("-12").unwrap();
792 assert!(!json_value.is_f64());
794 let json_value = from_str("12.0").unwrap();
795 assert!(json_value.is_f64());
797 let json_value = from_str("-12.0").unwrap();
798 assert!(json_value.is_f64());
803 let json_value = from_str("-12").unwrap();
804 let json_num = json_value.as_i64();
805 assert_eq!(json_num, Some(-12));
810 let json_value = from_str("12").unwrap();
811 let json_num = json_value.as_u64();
812 assert_eq!(json_num, Some(12));
817 let json_value = from_str("12.0").unwrap();
818 let json_num = json_value.as_f64();
819 assert_eq!(json_num, Some(12f64));
823 fn test_is_boolean(){
824 let json_value = from_str("false").unwrap();
825 assert!(json_value.is_boolean());
829 fn test_as_boolean(){
830 let json_value = from_str("false").unwrap();
831 let json_bool = json_value.as_boolean();
832 let expected_bool = false;
833 assert!(json_bool.is_some() && json_bool.unwrap() == expected_bool);
838 let json_value = from_str("null").unwrap();
839 assert!(json_value.is_null());
844 let json_value = from_str("null").unwrap();
845 let json_null = json_value.as_null();
846 let expected_null = ();
847 assert!(json_null.is_some() && json_null.unwrap() == expected_null);
851 fn test_encode_hashmap_with_numeric_key() {
852 use std::str::from_utf8;
853 use std::collections::HashMap;
854 let mut hm: HashMap<usize, bool> = HashMap::new();
856 let mut mem_buf = Vec::new();
857 write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
858 let json_str = from_utf8(&mem_buf[..]).unwrap();
859 match from_str(json_str) {
860 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
861 _ => {} // it parsed and we are good to go
866 fn test_prettyencode_hashmap_with_numeric_key() {
867 use std::str::from_utf8;
868 use std::collections::HashMap;
869 let mut hm: HashMap<usize, bool> = HashMap::new();
871 let mut mem_buf = Vec::new();
872 write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
873 let json_str = from_utf8(&mem_buf[..]).unwrap();
874 match from_str(json_str) {
875 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
876 _ => {} // it parsed and we are good to go
881 fn test_prettyencoder_indent_level_param() {
882 use std::str::from_utf8;
883 use std::collections::BTreeMap;
885 let mut tree = BTreeMap::new();
887 tree.insert("hello".to_string(), String("guten tag".to_string()));
888 tree.insert("goodbye".to_string(), String("sayonara".to_string()));
891 // The following layout below should look a lot like
892 // the pretty-printed JSON (indent * x)
895 String("greetings".to_string()), // 1x
896 Object(tree), // 1x + 2x + 2x + 1x
898 // End JSON array (7 lines)
901 // Helper function for counting indents
902 fn indents(source: &str) -> usize {
903 let trimmed = source.trim_start_matches(' ');
904 source.len() - trimmed.len()
907 // Test up to 4 spaces of indents (more?)
909 let mut writer = Vec::new();
910 write!(&mut writer, "{}",
911 json::as_pretty_json(&json).indent(i)).unwrap();
913 let printed = from_utf8(&writer[..]).unwrap();
915 // Check for indents at each line
916 let lines: Vec<&str> = printed.lines().collect();
917 assert_eq!(lines.len(), 7); // JSON should be 7 lines
919 assert_eq!(indents(lines[0]), 0 * i); // [
920 assert_eq!(indents(lines[1]), 1 * i); // "greetings",
921 assert_eq!(indents(lines[2]), 1 * i); // {
922 assert_eq!(indents(lines[3]), 2 * i); // "hello": "guten tag",
923 assert_eq!(indents(lines[4]), 2 * i); // "goodbye": "sayonara"
924 assert_eq!(indents(lines[5]), 1 * i); // },
925 assert_eq!(indents(lines[6]), 0 * i); // ]
927 // Finally, test that the pretty-printed JSON is valid
928 from_str(printed).ok().expect("Pretty-printed JSON is invalid!");
933 fn test_hashmap_with_enum_key() {
934 use std::collections::HashMap;
935 #[derive(RustcEncodable, Eq, Hash, PartialEq, RustcDecodable, Debug)]
941 let mut map = HashMap::new();
942 map.insert(Enum::Foo, 0);
943 let result = json::encode(&map).unwrap();
944 assert_eq!(&result[..], r#"{"Foo":0}"#);
945 let decoded: HashMap<Enum, _> = json::decode(&result).unwrap();
946 assert_eq!(map, decoded);
950 fn test_hashmap_with_numeric_key_can_handle_double_quote_delimited_key() {
951 use std::collections::HashMap;
952 let json_str = "{\"1\":true}";
953 let json_obj = match from_str(json_str) {
954 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
957 let mut decoder = Decoder::new(json_obj);
958 let _hm: HashMap<usize, bool> = Decodable::decode(&mut decoder).unwrap();
962 fn test_hashmap_with_numeric_key_will_error_with_string_keys() {
963 use std::collections::HashMap;
964 let json_str = "{\"a\":true}";
965 let json_obj = match from_str(json_str) {
966 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
969 let mut decoder = Decoder::new(json_obj);
970 let result: Result<HashMap<usize, bool>, DecoderError> = Decodable::decode(&mut decoder);
971 assert_eq!(result, Err(ExpectedError("Number".to_string(), "a".to_string())));
974 fn assert_stream_equal(src: &str,
975 expected: Vec<(JsonEvent, Vec<StackElement<'_>>)>) {
976 let mut parser = Parser::new(src.chars());
979 let evt = match parser.next() {
983 let (ref expected_evt, ref expected_stack) = expected[i];
984 if !parser.stack().is_equal_to(expected_stack) {
985 panic!("Parser stack is not equal to {:?}", expected_stack);
987 assert_eq!(&evt, expected_evt);
992 fn test_streaming_parser() {
994 r#"{ "foo":"bar", "array" : [0, 1, 2, 3, 4, 5], "idents":[null,true,false]}"#,
996 (ObjectStart, vec![]),
997 (StringValue("bar".to_string()), vec![StackElement::Key("foo")]),
998 (ArrayStart, vec![StackElement::Key("array")]),
999 (U64Value(0), vec![StackElement::Key("array"), StackElement::Index(0)]),
1000 (U64Value(1), vec![StackElement::Key("array"), StackElement::Index(1)]),
1001 (U64Value(2), vec![StackElement::Key("array"), StackElement::Index(2)]),
1002 (U64Value(3), vec![StackElement::Key("array"), StackElement::Index(3)]),
1003 (U64Value(4), vec![StackElement::Key("array"), StackElement::Index(4)]),
1004 (U64Value(5), vec![StackElement::Key("array"), StackElement::Index(5)]),
1005 (ArrayEnd, vec![StackElement::Key("array")]),
1006 (ArrayStart, vec![StackElement::Key("idents")]),
1007 (NullValue, vec![StackElement::Key("idents"),
1008 StackElement::Index(0)]),
1009 (BooleanValue(true), vec![StackElement::Key("idents"),
1010 StackElement::Index(1)]),
1011 (BooleanValue(false), vec![StackElement::Key("idents"),
1012 StackElement::Index(2)]),
1013 (ArrayEnd, vec![StackElement::Key("idents")]),
1014 (ObjectEnd, vec![]),
1018 fn last_event(src: &str) -> JsonEvent {
1019 let mut parser = Parser::new(src.chars());
1020 let mut evt = NullValue;
1022 evt = match parser.next() {
1030 fn test_read_object_streaming() {
1031 assert_eq!(last_event("{ "), Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
1032 assert_eq!(last_event("{1"), Error(SyntaxError(KeyMustBeAString, 1, 2)));
1033 assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
1034 assert_eq!(last_event("{\"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
1035 assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
1037 assert_eq!(last_event("{\"a\" 1"), Error(SyntaxError(ExpectedColon, 1, 6)));
1038 assert_eq!(last_event("{\"a\":"), Error(SyntaxError(EOFWhileParsingValue, 1, 6)));
1039 assert_eq!(last_event("{\"a\":1"), Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
1040 assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax, 1, 8)));
1041 assert_eq!(last_event("{\"a\":1,"), Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
1042 assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
1044 assert_stream_equal(
1046 vec![(ObjectStart, vec![]), (ObjectEnd, vec![])]
1048 assert_stream_equal(
1051 (ObjectStart, vec![]),
1052 (U64Value(3), vec![StackElement::Key("a")]),
1053 (ObjectEnd, vec![]),
1056 assert_stream_equal(
1057 "{ \"a\": null, \"b\" : true }",
1059 (ObjectStart, vec![]),
1060 (NullValue, vec![StackElement::Key("a")]),
1061 (BooleanValue(true), vec![StackElement::Key("b")]),
1062 (ObjectEnd, vec![]),
1065 assert_stream_equal(
1066 "{\"a\" : 1.0 ,\"b\": [ true ]}",
1068 (ObjectStart, vec![]),
1069 (F64Value(1.0), vec![StackElement::Key("a")]),
1070 (ArrayStart, vec![StackElement::Key("b")]),
1071 (BooleanValue(true),vec![StackElement::Key("b"), StackElement::Index(0)]),
1072 (ArrayEnd, vec![StackElement::Key("b")]),
1073 (ObjectEnd, vec![]),
1076 assert_stream_equal(
1082 { "c": {"d": null} }
1086 (ObjectStart, vec![]),
1087 (F64Value(1.0), vec![StackElement::Key("a")]),
1088 (ArrayStart, vec![StackElement::Key("b")]),
1089 (BooleanValue(true), vec![StackElement::Key("b"),
1090 StackElement::Index(0)]),
1091 (StringValue("foo\nbar".to_string()), vec![StackElement::Key("b"),
1092 StackElement::Index(1)]),
1093 (ObjectStart, vec![StackElement::Key("b"),
1094 StackElement::Index(2)]),
1095 (ObjectStart, vec![StackElement::Key("b"),
1096 StackElement::Index(2),
1097 StackElement::Key("c")]),
1098 (NullValue, vec![StackElement::Key("b"),
1099 StackElement::Index(2),
1100 StackElement::Key("c"),
1101 StackElement::Key("d")]),
1102 (ObjectEnd, vec![StackElement::Key("b"),
1103 StackElement::Index(2),
1104 StackElement::Key("c")]),
1105 (ObjectEnd, vec![StackElement::Key("b"),
1106 StackElement::Index(2)]),
1107 (ArrayEnd, vec![StackElement::Key("b")]),
1108 (ObjectEnd, vec![]),
1113 fn test_read_array_streaming() {
1114 assert_stream_equal(
1117 (ArrayStart, vec![]),
1121 assert_stream_equal(
1124 (ArrayStart, vec![]),
1128 assert_stream_equal(
1131 (ArrayStart, vec![]),
1132 (BooleanValue(true), vec![StackElement::Index(0)]),
1136 assert_stream_equal(
1139 (ArrayStart, vec![]),
1140 (BooleanValue(false), vec![StackElement::Index(0)]),
1144 assert_stream_equal(
1147 (ArrayStart, vec![]),
1148 (NullValue, vec![StackElement::Index(0)]),
1152 assert_stream_equal(
1155 (ArrayStart, vec![]),
1156 (U64Value(3), vec![StackElement::Index(0)]),
1157 (U64Value(1), vec![StackElement::Index(1)]),
1161 assert_stream_equal(
1164 (ArrayStart, vec![]),
1165 (U64Value(3), vec![StackElement::Index(0)]),
1166 (U64Value(2), vec![StackElement::Index(1)]),
1170 assert_stream_equal(
1173 (ArrayStart, vec![]),
1174 (U64Value(2), vec![StackElement::Index(0)]),
1175 (ArrayStart, vec![StackElement::Index(1)]),
1176 (U64Value(4), vec![StackElement::Index(1), StackElement::Index(0)]),
1177 (U64Value(1), vec![StackElement::Index(1), StackElement::Index(1)]),
1178 (ArrayEnd, vec![StackElement::Index(1)]),
1183 assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1, 2)));
1185 assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
1186 assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
1187 assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
1188 assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
1189 assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
1193 fn test_trailing_characters_streaming() {
1194 assert_eq!(last_event("nulla"), Error(SyntaxError(TrailingCharacters, 1, 5)));
1195 assert_eq!(last_event("truea"), Error(SyntaxError(TrailingCharacters, 1, 5)));
1196 assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
1197 assert_eq!(last_event("1a"), Error(SyntaxError(TrailingCharacters, 1, 2)));
1198 assert_eq!(last_event("[]a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
1199 assert_eq!(last_event("{}a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
1202 fn test_read_identifiers_streaming() {
1203 assert_eq!(Parser::new("null".chars()).next(), Some(NullValue));
1204 assert_eq!(Parser::new("true".chars()).next(), Some(BooleanValue(true)));
1205 assert_eq!(Parser::new("false".chars()).next(), Some(BooleanValue(false)));
1207 assert_eq!(last_event("n"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1208 assert_eq!(last_event("nul"), Error(SyntaxError(InvalidSyntax, 1, 4)));
1209 assert_eq!(last_event("t"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1210 assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
1211 assert_eq!(last_event("f"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1212 assert_eq!(last_event("faz"), Error(SyntaxError(InvalidSyntax, 1, 3)));
1217 use std::collections::{HashMap,BTreeMap};
1220 let array2 = Array(vec![U64(1), U64(2)]);
1221 let array3 = Array(vec![U64(1), U64(2), U64(3)]);
1223 let mut tree_map = BTreeMap::new();
1224 tree_map.insert("a".to_string(), U64(1));
1225 tree_map.insert("b".to_string(), U64(2));
1229 assert_eq!(array2.to_json(), array2);
1230 assert_eq!(object.to_json(), object);
1231 assert_eq!(3_isize.to_json(), I64(3));
1232 assert_eq!(4_i8.to_json(), I64(4));
1233 assert_eq!(5_i16.to_json(), I64(5));
1234 assert_eq!(6_i32.to_json(), I64(6));
1235 assert_eq!(7_i64.to_json(), I64(7));
1236 assert_eq!(8_usize.to_json(), U64(8));
1237 assert_eq!(9_u8.to_json(), U64(9));
1238 assert_eq!(10_u16.to_json(), U64(10));
1239 assert_eq!(11_u32.to_json(), U64(11));
1240 assert_eq!(12_u64.to_json(), U64(12));
1241 assert_eq!(13.0_f32.to_json(), F64(13.0_f64));
1242 assert_eq!(14.0_f64.to_json(), F64(14.0_f64));
1243 assert_eq!(().to_json(), Null);
1244 assert_eq!(f32::INFINITY.to_json(), Null);
1245 assert_eq!(f64::NAN.to_json(), Null);
1246 assert_eq!(true.to_json(), Boolean(true));
1247 assert_eq!(false.to_json(), Boolean(false));
1248 assert_eq!("abc".to_json(), String("abc".to_string()));
1249 assert_eq!("abc".to_string().to_json(), String("abc".to_string()));
1250 assert_eq!((1_usize, 2_usize).to_json(), array2);
1251 assert_eq!((1_usize, 2_usize, 3_usize).to_json(), array3);
1252 assert_eq!([1_usize, 2_usize].to_json(), array2);
1253 assert_eq!((&[1_usize, 2_usize, 3_usize]).to_json(), array3);
1254 assert_eq!((vec![1_usize, 2_usize]).to_json(), array2);
1255 assert_eq!(vec![1_usize, 2_usize, 3_usize].to_json(), array3);
1256 let mut tree_map = BTreeMap::new();
1257 tree_map.insert("a".to_string(), 1 as usize);
1258 tree_map.insert("b".to_string(), 2);
1259 assert_eq!(tree_map.to_json(), object);
1260 let mut hash_map = HashMap::new();
1261 hash_map.insert("a".to_string(), 1 as usize);
1262 hash_map.insert("b".to_string(), 2);
1263 assert_eq!(hash_map.to_json(), object);
1264 assert_eq!(Some(15).to_json(), I64(15));
1265 assert_eq!(Some(15 as usize).to_json(), U64(15));
1266 assert_eq!(None::<isize>.to_json(), Null);
1270 fn test_encode_hashmap_with_arbitrary_key() {
1271 use std::collections::HashMap;
1272 #[derive(PartialEq, Eq, Hash, RustcEncodable)]
1273 struct ArbitraryType(usize);
1274 let mut hm: HashMap<ArbitraryType, bool> = HashMap::new();
1275 hm.insert(ArbitraryType(1), true);
1276 let mut mem_buf = string::String::new();
1277 let mut encoder = Encoder::new(&mut mem_buf);
1278 let result = hm.encode(&mut encoder);
1279 match result.unwrap_err() {
1280 EncoderError::BadHashmapKey => (),
1281 _ => panic!("expected bad hash map key")