pg-wired 0.4.0

Minimal async PostgreSQL wire protocol v3 client: connection, extended query, pipelining, COPY, LISTEN/NOTIFY, TLS, SCRAM.
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
140
141
142
143
144
145
146
147
148
149
150
151
152

//! Basic integration tests for pg-wired.
//! Requires: docker compose up -d (PostgreSQL on port 54322)

use pg_wired::{PgPipeline, WireConn};

mod test_env;
use test_env::{addr, db, pass, user};

async fn connect() -> PgPipeline {
    let conn = WireConn::connect(addr(), user(), pass(), db())
        .await
        .unwrap();
    PgPipeline::new(conn)
}

#[tokio::test]
async fn test_connect() {
    let _pg = connect().await;
}

#[tokio::test]
async fn test_simple_query() {
    let mut pg = connect().await;
    pg.simple_query("SELECT 1").await.unwrap();
}

#[tokio::test]
async fn test_parameterized_query() {
    let mut pg = connect().await;
    let rows = pg
        .query(
            "SELECT $1::text AS greeting",
            &[Some(b"hello" as &[u8])],
            &[0], // 0 = let server infer type
        )
        .await
        .unwrap();
    assert_eq!(rows.len(), 1);
    let val = rows[0].cell(0).unwrap();
    assert_eq!(std::str::from_utf8(val).unwrap(), "hello");
}

#[tokio::test]
async fn test_query_multiple_rows() {
    let mut pg = connect().await;
    let rows = pg
        .query("SELECT id, name FROM api.authors ORDER BY id", &[], &[])
        .await
        .unwrap();
    assert!(rows.len() >= 3); // seed data has 3 authors
}

#[tokio::test]
async fn test_query_with_filter() {
    let mut pg = connect().await;
    let rows = pg
        .query(
            "SELECT name FROM api.authors WHERE id = ($1::text)::int4",
            &[Some(b"1" as &[u8])],
            &[0], // text format, server infers type
        )
        .await
        .unwrap();
    assert_eq!(rows.len(), 1);
    let name = std::str::from_utf8(rows[0].cell(0).unwrap()).unwrap();
    assert_eq!(name, "Alice");
}

#[tokio::test]
async fn test_statement_cache() {
    let mut pg = connect().await;
    // First call: Parse + Bind + Execute + Sync
    let rows1 = pg.query("SELECT 1 AS n", &[], &[]).await.unwrap();
    // Second call: cache hit — Bind + Execute + Sync (no Parse)
    let rows2 = pg.query("SELECT 1 AS n", &[], &[]).await.unwrap();
    assert_eq!(rows1.len(), 1);
    assert_eq!(rows2.len(), 1);
}

#[tokio::test]
async fn test_pipeline_with_setup() {
    let mut pg = connect().await;
    let rows = pg
        .pipeline_with_setup(
            "SET search_path TO api",
            "SELECT name FROM authors ORDER BY id",
            &[],
            &[],
        )
        .await
        .unwrap();
    assert!(rows.len() >= 3);
    // Reset search path for other tests
    pg.simple_query("SET search_path TO public").await.unwrap();
}

#[tokio::test]
async fn test_pipeline_transaction() {
    let mut pg = connect().await;
    let rows = pg
        .pipeline_transaction(
            "BEGIN; SET LOCAL ROLE web_anon",
            "SELECT coalesce(json_agg(t), '[]')::text FROM (SELECT id, name FROM api.authors ORDER BY id) t",
            &[],
            &[],
        )
        .await
        .unwrap();
    assert_eq!(rows.len(), 1);
    let json = std::str::from_utf8(rows[0].cell(0).unwrap()).unwrap();
    assert!(json.contains("Alice"));
}

#[tokio::test]
async fn test_pipeline_transaction_with_jwt() {
    let mut pg = connect().await;
    let rows = pg
        .pipeline_transaction(
            "BEGIN; SET LOCAL ROLE test_user; SELECT set_config('request.jwt.claims', '{\"role\":\"test_user\"}', true)",
            "SELECT coalesce(json_agg(t), '[]')::text FROM (SELECT id, title, status FROM api.articles ORDER BY id) t",
            &[],
            &[],
        )
        .await
        .unwrap();
    assert_eq!(rows.len(), 1);
    let json = std::str::from_utf8(rows[0].cell(0).unwrap()).unwrap();
    // test_user should see all articles (including drafts)
    assert!(json.contains("draft") || json.contains("Draft"));
}

#[tokio::test]
async fn test_error_recovery() {
    let mut pg = connect().await;
    // Query that errors (table doesn't exist).
    let result = pg.query("SELECT * FROM nonexistent_table", &[], &[]).await;
    assert!(result.is_err());
    // Connection should still be usable after error.
    let rows = pg.query("SELECT 1 AS n", &[], &[]).await.unwrap();
    assert_eq!(rows.len(), 1);
}

#[tokio::test]
async fn test_null_parameter() {
    let mut pg = connect().await;
    let rows = pg
        .query("SELECT $1::text AS val", &[None], &[0])
        .await
        .unwrap();
    assert_eq!(rows.len(), 1);
    assert!((rows[0].try_cell(0) == Some(None))); // NULL result
}