enum-map 3.0.0

A map with C-like enum keys represented internally as an array
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127

#![cfg(feature = "serde")]
// SPDX-FileCopyrightText: 2017 - 2022 Kamila Borowska <kamila@borowska.pw>
// SPDX-FileCopyrightText: 2022 Cass Fridkin <cass@cloudflare.com>
//
// SPDX-License-Identifier: MIT OR Apache-2.0
#![warn(clippy::pedantic)]

use enum_map::{EnumMap, enum_map};
use enum_map_derive::Enum;
use serde::{Deserialize, Serialize};
use serde_test::{Compact, Configure, Token, assert_de_tokens_error, assert_tokens};

#[derive(Debug, Enum, Deserialize, Serialize)]
enum Example {
    A,
    B,
}

#[test]
fn serialization() {
    let map = enum_map! { Example::A => 5, Example::B => 10 };
    assert_tokens(
        &map.readable(),
        &[
            Token::Map { len: Some(2) },
            Token::UnitVariant {
                name: "Example",
                variant: "A",
            },
            Token::I32(5),
            Token::UnitVariant {
                name: "Example",
                variant: "B",
            },
            Token::I32(10),
            Token::MapEnd,
        ],
    );
}

#[test]
fn compact_serialization() {
    let map = enum_map! { Example::A => 5, Example::B => 10 };
    assert_tokens(
        &map.compact(),
        &[
            Token::Tuple { len: 2 },
            Token::I32(5),
            Token::I32(10),
            Token::TupleEnd,
        ],
    );
}

#[test]
fn invalid_compact_deserialization() {
    assert_de_tokens_error::<Compact<EnumMap<bool, bool>>>(
        &[Token::I32(4)],
        "invalid type: integer `4`, expected a sequence",
    );
}

#[test]
fn too_short_compact_deserialization() {
    assert_de_tokens_error::<Compact<EnumMap<bool, bool>>>(
        &[Token::Seq { len: None }, Token::Bool(true), Token::SeqEnd],
        "invalid length 1, expected a sequence with as many elements as there are variants",
    );
}

const JSON: &str = r#"{"A":5,"B":10}"#;

#[test]
fn json_serialization() {
    let map = enum_map! { Example::A => 5, Example::B => 10 };
    assert_eq!(serde_json::to_string(&map).unwrap(), String::from(JSON));
}

#[test]
fn json_deserialization() {
    let example: EnumMap<Example, i32> = serde_json::from_str(JSON).unwrap();
    assert_eq!(example, enum_map! { Example::A => 5, Example::B => 10 });
}

#[test]
fn json_invalid_deserialization() {
    let example: Result<EnumMap<Example, i32>, _> = serde_json::from_str(r"{}");
    assert!(example.is_err());
}

#[test]
fn json_invalid_type() {
    let example: Result<EnumMap<Example, i32>, _> = serde_json::from_str("4");
    assert!(example.is_err());
}

#[test]
fn json_invalid_key() {
    let example: Result<EnumMap<Example, i32>, _> =
        serde_json::from_str(r#"{"a": 5, "b": 10, "c": 6}"#);
    assert!(example.is_err());
}

#[test]
fn bincode_serialization() {
    let example = enum_map! { false => 3u8, true => 4u8 };
    let config = bincode::config::standard();
    let serialized = bincode::serde::encode_to_vec(&example, config).unwrap();
    assert_eq!(
        example,
        bincode::serde::decode_from_slice(&serialized, config)
            .unwrap()
            .0
    );
}

#[test]
fn bincode_too_short_deserialization() {
    let config = bincode::config::standard();
    assert!(
        bincode::serde::decode_from_slice::<EnumMap<bool, bool>, _>(
            &bincode::serde::encode_to_vec(&(), config).unwrap(),
            config
        )
        .is_err()
    );
}