icydb-model-macros 0.301.0

Procedural macros for IcyDB application models
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
128
129
130
131
132
133
134
135
136
137
138
139

use super::{PrimaryKey, PrimaryKeySource};
use darling::{FromMeta, ast::NestedMeta};
use quote::quote;

fn parse_primary_key(tokens: proc_macro2::TokenStream) -> Result<PrimaryKey, darling::Error> {
    let args = NestedMeta::parse_meta_list(tokens).expect("test meta should parse");
    PrimaryKey::from_list(&args)
}

#[test]
fn from_list_parses_scalar_fields_syntax() {
    let primary_key = parse_primary_key(quote!(fields = ["id"]))
        .expect("scalar primary-key fields syntax should parse");

    assert_eq!(primary_key.scalar_field().to_string(), "id");
    assert_eq!(primary_key.fields().len(), 1);
    assert_eq!(primary_key.source, PrimaryKeySource::Internal);
}

#[test]
fn from_list_parses_explicit_external_source() {
    let primary_key = parse_primary_key(quote!(fields = ["pid"], source = "external"))
        .expect("explicit external primary-key source should parse");

    assert_eq!(primary_key.scalar_field().to_string(), "pid");
    assert_eq!(primary_key.fields().len(), 1);
    assert_eq!(primary_key.source, PrimaryKeySource::External);
}

#[test]
fn from_list_parses_scalar_field_shorthand() {
    let primary_key = parse_primary_key(quote!(field = "id"))
        .expect("scalar primary-key field shorthand should parse");

    assert_eq!(primary_key.scalar_field().to_string(), "id");
    assert_eq!(primary_key.fields().len(), 1);
    assert_eq!(primary_key.source, PrimaryKeySource::Internal);
}

#[test]
fn from_list_rejects_mixed_field_and_fields_syntax() {
    let err = parse_primary_key(quote!(field = "id", fields = ["tenant_id", "id"]))
        .expect_err("primary-key field and fields syntax should be mutually exclusive");

    assert!(
        err.to_string().contains(
            "pk(...) accepts either one field = \"...\" argument or one fields = [...] argument"
        ),
        "unexpected error: {err}",
    );
}

#[test]
fn from_list_rejects_comma_string_fields() {
    let err = parse_primary_key(quote!(fields = "id, name"))
        .expect_err("primary-key fields should require array syntax");

    assert!(
        err.to_string().contains("not a comma-string"),
        "unexpected error: {err}",
    );
}

#[test]
fn from_list_rejects_empty_fields() {
    let err =
        parse_primary_key(quote!(fields = [])).expect_err("empty primary-key fields should reject");

    assert!(
        err.to_string().contains("at least one field"),
        "unexpected error: {err}",
    );
}

#[test]
fn from_list_rejects_duplicate_fields() {
    let err = parse_primary_key(quote!(fields = ["tenant_id", "tenant_id"]))
        .expect_err("duplicate primary-key fields should reject");

    assert!(
        err.to_string()
            .contains("primary key field 'tenant_id' is declared more than once"),
        "unexpected error: {err}",
    );
}

#[test]
fn from_list_rejects_too_many_fields() {
    let err = parse_primary_key(quote!(fields = ["a", "b", "c", "d", "e"]))
        .expect_err("too many primary-key fields should reject");

    assert!(
        err.to_string().contains("supports at most 4 fields"),
        "unexpected error: {err}",
    );
}

#[test]
fn from_list_parses_composite_with_external_default() {
    let primary_key = parse_primary_key(quote!(fields = ["tenant_id", "local_id"]))
        .expect("composite primary-key fields syntax should parse");

    assert_eq!(
        primary_key
            .fields()
            .iter()
            .map(ToString::to_string)
            .collect::<Vec<_>>(),
        ["tenant_id", "local_id"],
    );
    assert_eq!(primary_key.source, PrimaryKeySource::External);
}

#[test]
fn from_list_parses_explicit_external_composite_source() {
    let primary_key = parse_primary_key(quote!(
        fields = ["tenant_id", "local_id"],
        source = "external"
    ))
    .expect("explicit external composite primary-key source should parse");

    assert_eq!(primary_key.fields().len(), 2);
    assert_eq!(primary_key.source, PrimaryKeySource::External);
}

#[test]
fn from_list_rejects_explicit_internal_composite_source() {
    let err = parse_primary_key(quote!(
        fields = ["tenant_id", "local_id"],
        source = "internal"
    ))
    .expect_err("internal composite primary-key source should reject");

    assert!(
        err.to_string()
            .contains("composite primary keys are external-only"),
        "unexpected error: {err}",
    );
}