1 extern crate serialize as rustc_serialize;
3 use rustc_serialize::{Encodable, Decodable};
4 use rustc_serialize::json;
6 use json::ErrorCode::*;
7 use json::ParserError::*;
8 use json::DecoderError::*;
9 use json::JsonEvent::*;
10 use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
11 Decoder, Encoder, EncoderError};
14 use std::{i64, u64, f32, f64};
15 use std::io::prelude::*;
16 use std::collections::BTreeMap;
19 #[derive(RustcDecodable, Eq, PartialEq, Debug)]
25 fn test_decode_option_none() {
27 let obj: OptionData = json::decode(s).unwrap();
28 assert_eq!(obj, OptionData { opt: None });
32 fn test_decode_option_some() {
33 let s = "{ \"opt\": 10 }";
34 let obj: OptionData = json::decode(s).unwrap();
35 assert_eq!(obj, OptionData { opt: Some(10) });
39 fn test_decode_option_malformed() {
40 check_err::<OptionData>("{ \"opt\": [] }",
41 ExpectedError("Number".to_string(), "[]".to_string()));
42 check_err::<OptionData>("{ \"opt\": false }",
43 ExpectedError("Number".to_string(), "false".to_string()));
46 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
49 Frog(string::String, isize)
52 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
56 c: Vec<string::String>,
59 #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
64 fn mk_object(items: &[(string::String, Json)]) -> Json {
65 let mut d = BTreeMap::new();
69 (ref key, ref value) => { d.insert((*key).clone(), (*value).clone()); },
77 fn test_from_str_trait() {
79 assert!(s.parse::<Json>().unwrap() == s.parse().unwrap());
83 fn test_write_null() {
84 assert_eq!(Null.to_string(), "null");
85 assert_eq!(Null.pretty().to_string(), "null");
90 assert_eq!(U64(0).to_string(), "0");
91 assert_eq!(U64(0).pretty().to_string(), "0");
93 assert_eq!(U64(1234).to_string(), "1234");
94 assert_eq!(U64(1234).pretty().to_string(), "1234");
96 assert_eq!(I64(-5678).to_string(), "-5678");
97 assert_eq!(I64(-5678).pretty().to_string(), "-5678");
99 assert_eq!(U64(7650007200025252000).to_string(), "7650007200025252000");
100 assert_eq!(U64(7650007200025252000).pretty().to_string(), "7650007200025252000");
104 fn test_write_f64() {
105 assert_eq!(F64(3.0).to_string(), "3.0");
106 assert_eq!(F64(3.0).pretty().to_string(), "3.0");
108 assert_eq!(F64(3.1).to_string(), "3.1");
109 assert_eq!(F64(3.1).pretty().to_string(), "3.1");
111 assert_eq!(F64(-1.5).to_string(), "-1.5");
112 assert_eq!(F64(-1.5).pretty().to_string(), "-1.5");
114 assert_eq!(F64(0.5).to_string(), "0.5");
115 assert_eq!(F64(0.5).pretty().to_string(), "0.5");
117 assert_eq!(F64(f64::NAN).to_string(), "null");
118 assert_eq!(F64(f64::NAN).pretty().to_string(), "null");
120 assert_eq!(F64(f64::INFINITY).to_string(), "null");
121 assert_eq!(F64(f64::INFINITY).pretty().to_string(), "null");
123 assert_eq!(F64(f64::NEG_INFINITY).to_string(), "null");
124 assert_eq!(F64(f64::NEG_INFINITY).pretty().to_string(), "null");
128 fn test_write_str() {
129 assert_eq!(String("".to_string()).to_string(), "\"\"");
130 assert_eq!(String("".to_string()).pretty().to_string(), "\"\"");
132 assert_eq!(String("homura".to_string()).to_string(), "\"homura\"");
133 assert_eq!(String("madoka".to_string()).pretty().to_string(), "\"madoka\"");
137 fn test_write_bool() {
138 assert_eq!(Boolean(true).to_string(), "true");
139 assert_eq!(Boolean(true).pretty().to_string(), "true");
141 assert_eq!(Boolean(false).to_string(), "false");
142 assert_eq!(Boolean(false).pretty().to_string(), "false");
146 fn test_write_array() {
147 assert_eq!(Array(vec![]).to_string(), "[]");
148 assert_eq!(Array(vec![]).pretty().to_string(), "[]");
150 assert_eq!(Array(vec![Boolean(true)]).to_string(), "[true]");
152 Array(vec![Boolean(true)]).pretty().to_string(),
159 let long_test_array = Array(vec![
162 Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
164 assert_eq!(long_test_array.to_string(),
165 "[false,null,[\"foo\\nbar\",3.5]]");
167 long_test_array.pretty().to_string(),
181 fn test_write_object() {
182 assert_eq!(mk_object(&[]).to_string(), "{}");
183 assert_eq!(mk_object(&[]).pretty().to_string(), "{}");
187 ("a".to_string(), Boolean(true))
192 mk_object(&[("a".to_string(), Boolean(true))]).pretty().to_string(),
199 let complex_obj = mk_object(&[
200 ("b".to_string(), Array(vec![
201 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
202 mk_object(&[("d".to_string(), String("".to_string()))])
207 complex_obj.to_string(),
216 complex_obj.pretty().to_string(),
221 \"c\": \"\\f\\r\"\n \
231 ("a".to_string(), Boolean(true)),
232 ("b".to_string(), Array(vec![
233 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
234 mk_object(&[("d".to_string(), String("".to_string()))])
238 // We can't compare the strings directly because the object fields be
239 // printed in a different order.
240 assert_eq!(a.clone(), a.to_string().parse().unwrap());
241 assert_eq!(a.clone(), a.pretty().to_string().parse().unwrap());
245 fn test_write_enum() {
248 json::as_json(&animal).to_string(),
252 json::as_pretty_json(&animal).to_string(),
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(),
409 "765.25".to_string())));
414 assert_eq!(from_str("\""), Err(SyntaxError(EOFWhileParsingString, 1, 2)));
415 assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
417 assert_eq!(from_str("\"\""), Ok(String("".to_string())));
418 assert_eq!(from_str("\"foo\""), Ok(String("foo".to_string())));
419 assert_eq!(from_str("\"\\\"\""), Ok(String("\"".to_string())));
420 assert_eq!(from_str("\"\\b\""), Ok(String("\x08".to_string())));
421 assert_eq!(from_str("\"\\n\""), Ok(String("\n".to_string())));
422 assert_eq!(from_str("\"\\r\""), Ok(String("\r".to_string())));
423 assert_eq!(from_str("\"\\t\""), Ok(String("\t".to_string())));
424 assert_eq!(from_str(" \"foo\" "), Ok(String("foo".to_string())));
425 assert_eq!(from_str("\"\\u12ab\""), Ok(String("\u{12ab}".to_string())));
426 assert_eq!(from_str("\"\\uAB12\""), Ok(String("\u{AB12}".to_string())));
430 fn test_decode_str() {
431 let s = [("\"\"", ""),
438 ("\"\\u12ab\"", "\u{12ab}"),
439 ("\"\\uAB12\"", "\u{AB12}")];
442 let v: string::String = json::decode(i).unwrap();
448 fn test_read_array() {
449 assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
450 assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
451 assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
452 assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
453 assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
455 assert_eq!(from_str("[]"), Ok(Array(vec![])));
456 assert_eq!(from_str("[ ]"), Ok(Array(vec![])));
457 assert_eq!(from_str("[true]"), Ok(Array(vec![Boolean(true)])));
458 assert_eq!(from_str("[ false ]"), Ok(Array(vec![Boolean(false)])));
459 assert_eq!(from_str("[null]"), Ok(Array(vec![Null])));
460 assert_eq!(from_str("[3, 1]"),
461 Ok(Array(vec![U64(3), U64(1)])));
462 assert_eq!(from_str("\n[3, 2]\n"),
463 Ok(Array(vec![U64(3), U64(2)])));
464 assert_eq!(from_str("[2, [4, 1]]"),
465 Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
469 fn test_decode_array() {
470 let v: Vec<()> = json::decode("[]").unwrap();
473 let v: Vec<()> = json::decode("[null]").unwrap();
476 let v: Vec<bool> = json::decode("[true]").unwrap();
477 assert_eq!(v, [true]);
479 let v: Vec<isize> = json::decode("[3, 1]").unwrap();
480 assert_eq!(v, [3, 1]);
482 let v: Vec<Vec<usize>> = json::decode("[[3], [1, 2]]").unwrap();
483 assert_eq!(v, [vec![3], vec![1, 2]]);
487 fn test_decode_tuple() {
488 let t: (usize, usize, usize) = json::decode("[1, 2, 3]").unwrap();
489 assert_eq!(t, (1, 2, 3));
491 let t: (usize, string::String) = json::decode("[1, \"two\"]").unwrap();
492 assert_eq!(t, (1, "two".to_string()));
496 fn test_decode_tuple_malformed_types() {
497 assert!(json::decode::<(usize, string::String)>("[1, 2]").is_err());
501 fn test_decode_tuple_malformed_length() {
502 assert!(json::decode::<(usize, usize)>("[1, 2, 3]").is_err());
506 fn test_read_object() {
507 assert_eq!(from_str("{"), Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
508 assert_eq!(from_str("{ "), Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
509 assert_eq!(from_str("{1"), Err(SyntaxError(KeyMustBeAString, 1, 2)));
510 assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
511 assert_eq!(from_str("{\"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
512 assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
514 assert_eq!(from_str("{\"a\" 1"), Err(SyntaxError(ExpectedColon, 1, 6)));
515 assert_eq!(from_str("{\"a\":"), Err(SyntaxError(EOFWhileParsingValue, 1, 6)));
516 assert_eq!(from_str("{\"a\":1"), Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
517 assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax, 1, 8)));
518 assert_eq!(from_str("{\"a\":1,"), Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
520 assert_eq!(from_str("{}").unwrap(), mk_object(&[]));
521 assert_eq!(from_str("{\"a\": 3}").unwrap(),
522 mk_object(&[("a".to_string(), U64(3))]));
525 "{ \"a\": null, \"b\" : true }").unwrap(),
527 ("a".to_string(), Null),
528 ("b".to_string(), Boolean(true))]));
529 assert_eq!(from_str("\n{ \"a\": null, \"b\" : true }\n").unwrap(),
531 ("a".to_string(), Null),
532 ("b".to_string(), Boolean(true))]));
534 "{\"a\" : 1.0 ,\"b\": [ true ]}").unwrap(),
536 ("a".to_string(), F64(1.0)),
537 ("b".to_string(), Array(vec![Boolean(true)]))
545 { \"c\": {\"d\": null} } \
549 ("a".to_string(), F64(1.0)),
550 ("b".to_string(), Array(vec![
552 String("foo\nbar".to_string()),
554 ("c".to_string(), mk_object(&[("d".to_string(), Null)]))
561 fn test_decode_struct() {
564 { \"a\": null, \"b\": 2, \"c\": [\"abc\", \"xyz\"] }
568 let v: Outer = json::decode(s).unwrap();
573 Inner { a: (), b: 2, c: vec!["abc".to_string(), "xyz".to_string()] }
579 #[derive(RustcDecodable)]
585 fn test_decode_struct_with_nan() {
586 let s = "{\"f\":null,\"a\":[null,123]}";
587 let obj: FloatStruct = json::decode(s).unwrap();
588 assert!(obj.f.is_nan());
589 assert!(obj.a[0].is_nan());
590 assert_eq!(obj.a[1], 123f64);
594 fn test_decode_option() {
595 let value: Option<string::String> = json::decode("null").unwrap();
596 assert_eq!(value, None);
598 let value: Option<string::String> = json::decode("\"jodhpurs\"").unwrap();
599 assert_eq!(value, Some("jodhpurs".to_string()));
603 fn test_decode_enum() {
604 let value: Animal = json::decode("\"Dog\"").unwrap();
605 assert_eq!(value, Dog);
607 let s = "{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}";
608 let value: Animal = json::decode(s).unwrap();
609 assert_eq!(value, Frog("Henry".to_string(), 349));
613 fn test_decode_map() {
614 let s = "{\"a\": \"Dog\", \"b\": {\"variant\":\"Frog\",\
615 \"fields\":[\"Henry\", 349]}}";
616 let mut map: BTreeMap<string::String, Animal> = json::decode(s).unwrap();
618 assert_eq!(map.remove(&"a".to_string()), Some(Dog));
619 assert_eq!(map.remove(&"b".to_string()), Some(Frog("Henry".to_string(), 349)));
623 fn test_multiline_errors() {
624 assert_eq!(from_str("{\n \"foo\":\n \"bar\""),
625 Err(SyntaxError(EOFWhileParsingObject, 3, 8)));
628 #[derive(RustcDecodable)]
630 struct DecodeStruct {
636 #[derive(RustcDecodable)]
641 fn check_err<T: Decodable>(to_parse: &'static str, expected: DecoderError) {
642 let res: DecodeResult<T> = match from_str(to_parse) {
643 Err(e) => Err(ParseError(e)),
644 Ok(json) => Decodable::decode(&mut Decoder::new(json))
647 Ok(_) => panic!("`{:?}` parsed & decoded ok, expecting error `{:?}`",
649 Err(ParseError(e)) => panic!("`{:?}` is not valid json: {:?}",
652 assert_eq!(e, expected);
657 fn test_decode_errors_struct() {
658 check_err::<DecodeStruct>("[]", ExpectedError("Object".to_string(), "[]".to_string()));
659 check_err::<DecodeStruct>("{\"x\": true, \"y\": true, \"z\": \"\", \"w\": []}",
660 ExpectedError("Number".to_string(), "true".to_string()));
661 check_err::<DecodeStruct>("{\"x\": 1, \"y\": [], \"z\": \"\", \"w\": []}",
662 ExpectedError("Boolean".to_string(), "[]".to_string()));
663 check_err::<DecodeStruct>("{\"x\": 1, \"y\": true, \"z\": {}, \"w\": []}",
664 ExpectedError("String".to_string(), "{}".to_string()));
665 check_err::<DecodeStruct>("{\"x\": 1, \"y\": true, \"z\": \"\", \"w\": null}",
666 ExpectedError("Array".to_string(), "null".to_string()));
667 check_err::<DecodeStruct>("{\"x\": 1, \"y\": true, \"z\": \"\"}",
668 MissingFieldError("w".to_string()));
671 fn test_decode_errors_enum() {
672 check_err::<DecodeEnum>("{}",
673 MissingFieldError("variant".to_string()));
674 check_err::<DecodeEnum>("{\"variant\": 1}",
675 ExpectedError("String".to_string(), "1".to_string()));
676 check_err::<DecodeEnum>("{\"variant\": \"A\"}",
677 MissingFieldError("fields".to_string()));
678 check_err::<DecodeEnum>("{\"variant\": \"A\", \"fields\": null}",
679 ExpectedError("Array".to_string(), "null".to_string()));
680 check_err::<DecodeEnum>("{\"variant\": \"C\", \"fields\": []}",
681 UnknownVariantError("C".to_string()));
686 let json_value = from_str("{\"dog\" : \"cat\"}").unwrap();
687 let found_str = json_value.find("dog");
688 assert!(found_str.unwrap().as_string().unwrap() == "cat");
693 let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
694 let found_str = json_value.find_path(&["dog", "cat", "mouse"]);
695 assert!(found_str.unwrap().as_string().unwrap() == "cheese");
700 let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
701 let found_str = json_value.search("mouse").and_then(|j| j.as_string());
702 assert!(found_str.unwrap() == "cheese");
707 let json_value = from_str("{\"animals\":[\"dog\",\"cat\",\"mouse\"]}").unwrap();
708 let ref array = json_value["animals"];
709 assert_eq!(array[0].as_string().unwrap(), "dog");
710 assert_eq!(array[1].as_string().unwrap(), "cat");
711 assert_eq!(array[2].as_string().unwrap(), "mouse");
716 let json_value = from_str("{}").unwrap();
717 assert!(json_value.is_object());
722 let json_value = from_str("{}").unwrap();
723 let json_object = json_value.as_object();
724 assert!(json_object.is_some());
729 let json_value = from_str("[1, 2, 3]").unwrap();
730 assert!(json_value.is_array());
735 let json_value = from_str("[1, 2, 3]").unwrap();
736 let json_array = json_value.as_array();
737 let expected_length = 3;
738 assert!(json_array.is_some() && json_array.unwrap().len() == expected_length);
743 let json_value = from_str("\"dog\"").unwrap();
744 assert!(json_value.is_string());
749 let json_value = from_str("\"dog\"").unwrap();
750 let json_str = json_value.as_string();
751 let expected_str = "dog";
752 assert_eq!(json_str, Some(expected_str));
757 let json_value = from_str("12").unwrap();
758 assert!(json_value.is_number());
763 let json_value = from_str("-12").unwrap();
764 assert!(json_value.is_i64());
766 let json_value = from_str("12").unwrap();
767 assert!(!json_value.is_i64());
769 let json_value = from_str("12.0").unwrap();
770 assert!(!json_value.is_i64());
775 let json_value = from_str("12").unwrap();
776 assert!(json_value.is_u64());
778 let json_value = from_str("-12").unwrap();
779 assert!(!json_value.is_u64());
781 let json_value = from_str("12.0").unwrap();
782 assert!(!json_value.is_u64());
787 let json_value = from_str("12").unwrap();
788 assert!(!json_value.is_f64());
790 let json_value = from_str("-12").unwrap();
791 assert!(!json_value.is_f64());
793 let json_value = from_str("12.0").unwrap();
794 assert!(json_value.is_f64());
796 let json_value = from_str("-12.0").unwrap();
797 assert!(json_value.is_f64());
802 let json_value = from_str("-12").unwrap();
803 let json_num = json_value.as_i64();
804 assert_eq!(json_num, Some(-12));
809 let json_value = from_str("12").unwrap();
810 let json_num = json_value.as_u64();
811 assert_eq!(json_num, Some(12));
816 let json_value = from_str("12.0").unwrap();
817 let json_num = json_value.as_f64();
818 assert_eq!(json_num, Some(12f64));
822 fn test_is_boolean(){
823 let json_value = from_str("false").unwrap();
824 assert!(json_value.is_boolean());
828 fn test_as_boolean(){
829 let json_value = from_str("false").unwrap();
830 let json_bool = json_value.as_boolean();
831 let expected_bool = false;
832 assert!(json_bool.is_some() && json_bool.unwrap() == expected_bool);
837 let json_value = from_str("null").unwrap();
838 assert!(json_value.is_null());
843 let json_value = from_str("null").unwrap();
844 let json_null = json_value.as_null();
845 let expected_null = ();
846 assert!(json_null.is_some() && json_null.unwrap() == expected_null);
850 fn test_encode_hashmap_with_numeric_key() {
851 use std::str::from_utf8;
852 use std::collections::HashMap;
853 let mut hm: HashMap<usize, bool> = HashMap::new();
855 let mut mem_buf = Vec::new();
856 write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
857 let json_str = from_utf8(&mem_buf[..]).unwrap();
858 match from_str(json_str) {
859 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
860 _ => {} // it parsed and we are good to go
865 fn test_prettyencode_hashmap_with_numeric_key() {
866 use std::str::from_utf8;
867 use std::collections::HashMap;
868 let mut hm: HashMap<usize, bool> = HashMap::new();
870 let mut mem_buf = Vec::new();
871 write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
872 let json_str = from_utf8(&mem_buf[..]).unwrap();
873 match from_str(json_str) {
874 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
875 _ => {} // it parsed and we are good to go
880 fn test_prettyencoder_indent_level_param() {
881 use std::str::from_utf8;
882 use std::collections::BTreeMap;
884 let mut tree = BTreeMap::new();
886 tree.insert("hello".to_string(), String("guten tag".to_string()));
887 tree.insert("goodbye".to_string(), String("sayonara".to_string()));
890 // The following layout below should look a lot like
891 // the pretty-printed JSON (indent * x)
894 String("greetings".to_string()), // 1x
895 Object(tree), // 1x + 2x + 2x + 1x
897 // End JSON array (7 lines)
900 // Helper function for counting indents
901 fn indents(source: &str) -> usize {
902 let trimmed = source.trim_start_matches(' ');
903 source.len() - trimmed.len()
906 // Test up to 4 spaces of indents (more?)
908 let mut writer = Vec::new();
909 write!(&mut writer, "{}",
910 json::as_pretty_json(&json).indent(i)).unwrap();
912 let printed = from_utf8(&writer[..]).unwrap();
914 // Check for indents at each line
915 let lines: Vec<&str> = printed.lines().collect();
916 assert_eq!(lines.len(), 7); // JSON should be 7 lines
918 assert_eq!(indents(lines[0]), 0 * i); // [
919 assert_eq!(indents(lines[1]), 1 * i); // "greetings",
920 assert_eq!(indents(lines[2]), 1 * i); // {
921 assert_eq!(indents(lines[3]), 2 * i); // "hello": "guten tag",
922 assert_eq!(indents(lines[4]), 2 * i); // "goodbye": "sayonara"
923 assert_eq!(indents(lines[5]), 1 * i); // },
924 assert_eq!(indents(lines[6]), 0 * i); // ]
926 // Finally, test that the pretty-printed JSON is valid
927 from_str(printed).ok().expect("Pretty-printed JSON is invalid!");
932 fn test_hashmap_with_enum_key() {
933 use std::collections::HashMap;
934 #[derive(RustcEncodable, Eq, Hash, PartialEq, RustcDecodable, Debug)]
940 let mut map = HashMap::new();
941 map.insert(Enum::Foo, 0);
942 let result = json::encode(&map).unwrap();
943 assert_eq!(&result[..], r#"{"Foo":0}"#);
944 let decoded: HashMap<Enum, _> = json::decode(&result).unwrap();
945 assert_eq!(map, decoded);
949 fn test_hashmap_with_numeric_key_can_handle_double_quote_delimited_key() {
950 use std::collections::HashMap;
951 let json_str = "{\"1\":true}";
952 let json_obj = match from_str(json_str) {
953 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
956 let mut decoder = Decoder::new(json_obj);
957 let _hm: HashMap<usize, bool> = Decodable::decode(&mut decoder).unwrap();
961 fn test_hashmap_with_numeric_key_will_error_with_string_keys() {
962 use std::collections::HashMap;
963 let json_str = "{\"a\":true}";
964 let json_obj = match from_str(json_str) {
965 Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
968 let mut decoder = Decoder::new(json_obj);
969 let result: Result<HashMap<usize, bool>, DecoderError> = Decodable::decode(&mut decoder);
970 assert_eq!(result, Err(ExpectedError("Number".to_string(), "a".to_string())));
973 fn assert_stream_equal(src: &str,
974 expected: Vec<(JsonEvent, Vec<StackElement<'_>>)>) {
975 let mut parser = Parser::new(src.chars());
978 let evt = match parser.next() {
982 let (ref expected_evt, ref expected_stack) = expected[i];
983 if !parser.stack().is_equal_to(expected_stack) {
984 panic!("Parser stack is not equal to {:?}", expected_stack);
986 assert_eq!(&evt, expected_evt);
991 fn test_streaming_parser() {
993 r#"{ "foo":"bar", "array" : [0, 1, 2, 3, 4, 5], "idents":[null,true,false]}"#,
995 (ObjectStart, vec![]),
996 (StringValue("bar".to_string()), vec![StackElement::Key("foo")]),
997 (ArrayStart, vec![StackElement::Key("array")]),
998 (U64Value(0), vec![StackElement::Key("array"), StackElement::Index(0)]),
999 (U64Value(1), vec![StackElement::Key("array"), StackElement::Index(1)]),
1000 (U64Value(2), vec![StackElement::Key("array"), StackElement::Index(2)]),
1001 (U64Value(3), vec![StackElement::Key("array"), StackElement::Index(3)]),
1002 (U64Value(4), vec![StackElement::Key("array"), StackElement::Index(4)]),
1003 (U64Value(5), vec![StackElement::Key("array"), StackElement::Index(5)]),
1004 (ArrayEnd, vec![StackElement::Key("array")]),
1005 (ArrayStart, vec![StackElement::Key("idents")]),
1006 (NullValue, vec![StackElement::Key("idents"),
1007 StackElement::Index(0)]),
1008 (BooleanValue(true), vec![StackElement::Key("idents"),
1009 StackElement::Index(1)]),
1010 (BooleanValue(false), vec![StackElement::Key("idents"),
1011 StackElement::Index(2)]),
1012 (ArrayEnd, vec![StackElement::Key("idents")]),
1013 (ObjectEnd, vec![]),
1017 fn last_event(src: &str) -> JsonEvent {
1018 let mut parser = Parser::new(src.chars());
1019 let mut evt = NullValue;
1021 evt = match parser.next() {
1029 fn test_read_object_streaming() {
1030 assert_eq!(last_event("{ "), Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
1031 assert_eq!(last_event("{1"), Error(SyntaxError(KeyMustBeAString, 1, 2)));
1032 assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
1033 assert_eq!(last_event("{\"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
1034 assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
1036 assert_eq!(last_event("{\"a\" 1"), Error(SyntaxError(ExpectedColon, 1, 6)));
1037 assert_eq!(last_event("{\"a\":"), Error(SyntaxError(EOFWhileParsingValue, 1, 6)));
1038 assert_eq!(last_event("{\"a\":1"), Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
1039 assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax, 1, 8)));
1040 assert_eq!(last_event("{\"a\":1,"), Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
1041 assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
1043 assert_stream_equal(
1045 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"),
1089 StackElement::Index(0)]),
1090 (StringValue("foo\nbar".to_string()), vec![StackElement::Key("b"),
1091 StackElement::Index(1)]),
1092 (ObjectStart, vec![StackElement::Key("b"),
1093 StackElement::Index(2)]),
1094 (ObjectStart, vec![StackElement::Key("b"),
1095 StackElement::Index(2),
1096 StackElement::Key("c")]),
1097 (NullValue, vec![StackElement::Key("b"),
1098 StackElement::Index(2),
1099 StackElement::Key("c"),
1100 StackElement::Key("d")]),
1101 (ObjectEnd, vec![StackElement::Key("b"),
1102 StackElement::Index(2),
1103 StackElement::Key("c")]),
1104 (ObjectEnd, vec![StackElement::Key("b"),
1105 StackElement::Index(2)]),
1106 (ArrayEnd, vec![StackElement::Key("b")]),
1107 (ObjectEnd, vec![]),
1112 fn test_read_array_streaming() {
1113 assert_stream_equal(
1116 (ArrayStart, vec![]),
1120 assert_stream_equal(
1123 (ArrayStart, vec![]),
1127 assert_stream_equal(
1130 (ArrayStart, vec![]),
1131 (BooleanValue(true), vec![StackElement::Index(0)]),
1135 assert_stream_equal(
1138 (ArrayStart, vec![]),
1139 (BooleanValue(false), vec![StackElement::Index(0)]),
1143 assert_stream_equal(
1146 (ArrayStart, vec![]),
1147 (NullValue, vec![StackElement::Index(0)]),
1151 assert_stream_equal(
1154 (ArrayStart, vec![]),
1155 (U64Value(3), vec![StackElement::Index(0)]),
1156 (U64Value(1), vec![StackElement::Index(1)]),
1160 assert_stream_equal(
1163 (ArrayStart, vec![]),
1164 (U64Value(3), vec![StackElement::Index(0)]),
1165 (U64Value(2), vec![StackElement::Index(1)]),
1169 assert_stream_equal(
1172 (ArrayStart, vec![]),
1173 (U64Value(2), vec![StackElement::Index(0)]),
1174 (ArrayStart, vec![StackElement::Index(1)]),
1175 (U64Value(4), vec![StackElement::Index(1), StackElement::Index(0)]),
1176 (U64Value(1), vec![StackElement::Index(1), StackElement::Index(1)]),
1177 (ArrayEnd, vec![StackElement::Index(1)]),
1182 assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1, 2)));
1184 assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
1185 assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
1186 assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
1187 assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
1188 assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
1192 fn test_trailing_characters_streaming() {
1193 assert_eq!(last_event("nulla"), Error(SyntaxError(TrailingCharacters, 1, 5)));
1194 assert_eq!(last_event("truea"), Error(SyntaxError(TrailingCharacters, 1, 5)));
1195 assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
1196 assert_eq!(last_event("1a"), Error(SyntaxError(TrailingCharacters, 1, 2)));
1197 assert_eq!(last_event("[]a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
1198 assert_eq!(last_event("{}a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
1201 fn test_read_identifiers_streaming() {
1202 assert_eq!(Parser::new("null".chars()).next(), Some(NullValue));
1203 assert_eq!(Parser::new("true".chars()).next(), Some(BooleanValue(true)));
1204 assert_eq!(Parser::new("false".chars()).next(), Some(BooleanValue(false)));
1206 assert_eq!(last_event("n"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1207 assert_eq!(last_event("nul"), Error(SyntaxError(InvalidSyntax, 1, 4)));
1208 assert_eq!(last_event("t"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1209 assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
1210 assert_eq!(last_event("f"), Error(SyntaxError(InvalidSyntax, 1, 2)));
1211 assert_eq!(last_event("faz"), Error(SyntaxError(InvalidSyntax, 1, 3)));
1216 use std::collections::{HashMap,BTreeMap};
1219 let array2 = Array(vec![U64(1), U64(2)]);
1220 let array3 = Array(vec![U64(1), U64(2), U64(3)]);
1222 let mut tree_map = BTreeMap::new();
1223 tree_map.insert("a".to_string(), U64(1));
1224 tree_map.insert("b".to_string(), U64(2));
1228 assert_eq!(array2.to_json(), array2);
1229 assert_eq!(object.to_json(), object);
1230 assert_eq!(3_isize.to_json(), I64(3));
1231 assert_eq!(4_i8.to_json(), I64(4));
1232 assert_eq!(5_i16.to_json(), I64(5));
1233 assert_eq!(6_i32.to_json(), I64(6));
1234 assert_eq!(7_i64.to_json(), I64(7));
1235 assert_eq!(8_usize.to_json(), U64(8));
1236 assert_eq!(9_u8.to_json(), U64(9));
1237 assert_eq!(10_u16.to_json(), U64(10));
1238 assert_eq!(11_u32.to_json(), U64(11));
1239 assert_eq!(12_u64.to_json(), U64(12));
1240 assert_eq!(13.0_f32.to_json(), F64(13.0_f64));
1241 assert_eq!(14.0_f64.to_json(), F64(14.0_f64));
1242 assert_eq!(().to_json(), Null);
1243 assert_eq!(f32::INFINITY.to_json(), Null);
1244 assert_eq!(f64::NAN.to_json(), Null);
1245 assert_eq!(true.to_json(), Boolean(true));
1246 assert_eq!(false.to_json(), Boolean(false));
1247 assert_eq!("abc".to_json(), String("abc".to_string()));
1248 assert_eq!("abc".to_string().to_json(), String("abc".to_string()));
1249 assert_eq!((1_usize, 2_usize).to_json(), array2);
1250 assert_eq!((1_usize, 2_usize, 3_usize).to_json(), array3);
1251 assert_eq!([1_usize, 2_usize].to_json(), array2);
1252 assert_eq!((&[1_usize, 2_usize, 3_usize]).to_json(), array3);
1253 assert_eq!((vec![1_usize, 2_usize]).to_json(), array2);
1254 assert_eq!(vec![1_usize, 2_usize, 3_usize].to_json(), array3);
1255 let mut tree_map = BTreeMap::new();
1256 tree_map.insert("a".to_string(), 1 as usize);
1257 tree_map.insert("b".to_string(), 2);
1258 assert_eq!(tree_map.to_json(), object);
1259 let mut hash_map = HashMap::new();
1260 hash_map.insert("a".to_string(), 1 as usize);
1261 hash_map.insert("b".to_string(), 2);
1262 assert_eq!(hash_map.to_json(), object);
1263 assert_eq!(Some(15).to_json(), I64(15));
1264 assert_eq!(Some(15 as usize).to_json(), U64(15));
1265 assert_eq!(None::<isize>.to_json(), Null);
1269 fn test_encode_hashmap_with_arbitrary_key() {
1270 use std::collections::HashMap;
1271 #[derive(PartialEq, Eq, Hash, RustcEncodable)]
1272 struct ArbitraryType(usize);
1273 let mut hm: HashMap<ArbitraryType, bool> = HashMap::new();
1274 hm.insert(ArbitraryType(1), true);
1275 let mut mem_buf = string::String::new();
1276 let mut encoder = Encoder::new(&mut mem_buf);
1277 let result = hm.encode(&mut encoder);
1278 match result.unwrap_err() {
1279 EncoderError::BadHashmapKey => (),
1280 _ => panic!("expected bad hash map key")