picojson 0.2.3

A resource-constrained JSON parser for embedded systems.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51

// Integration test for StreamParser configurability
use picojson::{ArrayBitStack, BitStackStruct, ChunkReader, Event, PullParser, StreamParser};

#[test]
fn test_stream_parser_default_config() {
    let json = b"{\"name\": \"test\"}";
    let reader = ChunkReader::new(json, 4);
    let mut buffer = [0u8; 128];

    // Default configuration: uses DefaultConfig (u32 bucket, u8 counter)
    let mut parser = StreamParser::new(reader, &mut buffer);

    assert_eq!(parser.next_event().unwrap(), Event::StartObject);
    assert!(matches!(parser.next_event().unwrap(), Event::Key(_)));
    assert!(matches!(parser.next_event().unwrap(), Event::String(_)));
    assert_eq!(parser.next_event().unwrap(), Event::EndObject);
    assert_eq!(parser.next_event().unwrap(), Event::EndDocument);
}

#[test]
fn test_stream_parser_custom_bitstack_config() {
    let json = b"{\"value\": 42}";
    let reader = ChunkReader::new(json, 3);
    let mut buffer = [0u8; 128];

    // Custom configuration: u64 bucket + u16 counter for deeper nesting
    let mut parser = StreamParser::<_, BitStackStruct<u64, u16>>::with_config(reader, &mut buffer);

    assert_eq!(parser.next_event().unwrap(), Event::StartObject);
    assert!(matches!(parser.next_event().unwrap(), Event::Key(_)));
    assert!(matches!(parser.next_event().unwrap(), Event::Number(_)));
    assert_eq!(parser.next_event().unwrap(), Event::EndObject);
    assert_eq!(parser.next_event().unwrap(), Event::EndDocument);
}

#[test]
fn test_stream_parser_array_bitstack_config() {
    let json = b"[true, false]";
    let reader = ChunkReader::new(json, 2);
    let mut buffer = [0u8; 128];

    // ArrayBitStack configuration: 4 elements of u32 + u16 counter for ultra-deep nesting
    let mut parser =
        StreamParser::<_, ArrayBitStack<4, u32, u16>>::with_config(reader, &mut buffer);

    assert_eq!(parser.next_event().unwrap(), Event::StartArray);
    assert_eq!(parser.next_event().unwrap(), Event::Bool(true));
    assert_eq!(parser.next_event().unwrap(), Event::Bool(false));
    assert_eq!(parser.next_event().unwrap(), Event::EndArray);
    assert_eq!(parser.next_event().unwrap(), Event::EndDocument);
}