toasty 0.4.0

An async ORM for Rust supporting SQL and NoSQL databases
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

use super::test_schema;
use crate::engine::simplify::Simplify;
use toasty_core::stmt::{Expr, ExprAny, ExprMap, ExprOr, Value};

/// Helper to construct an "any of" expression.
fn any_of(expr: Expr) -> ExprAny {
    ExprAny {
        expr: Box::new(expr),
    }
}

/// Helper for making a map expression.
fn map_expr(base: Expr, map: Expr) -> Expr {
    Expr::Map(ExprMap {
        base: Box::new(base),
        map: Box::new(map),
    })
}

/// Helper for making a value list.
fn value_list(values: Vec<Value>) -> Expr {
    Expr::Value(Value::List(values))
}

#[test]
fn non_map_returns_none() {
    let schema = test_schema();
    let simplify = Simplify::new(&schema);

    let expr = any_of(Expr::arg(0));
    let result = simplify.simplify_expr_any(&expr);

    assert!(result.is_none());
}

#[test]
fn non_const_base_returns_none() {
    let schema = test_schema();
    let simplify = Simplify::new(&schema);

    // Map with non-constant base (arg(0))
    let expr = any_of(map_expr(Expr::arg(0), Expr::arg(0)));
    let result = simplify.simplify_expr_any(&expr);

    assert!(result.is_none());
}

#[test]
fn empty_const_list_becomes_false() {
    let schema = test_schema();
    let simplify = Simplify::new(&schema);

    // `any(map([], x => x)) → false`
    let expr = any_of(map_expr(value_list(vec![]), Expr::arg(0)));
    let result = simplify.simplify_expr_any(&expr);

    assert!(result.is_some());
    assert!(result.unwrap().is_false());
}

#[test]
fn single_item_unwrapped() {
    let schema = test_schema();
    let simplify = Simplify::new(&schema);

    // `any(map([42], x => x)) → 42`
    let expr = any_of(map_expr(value_list(vec![Value::from(42i64)]), Expr::arg(0)));
    let result = simplify.simplify_expr_any(&expr);

    assert!(matches!(result, Some(Expr::Value(Value::I64(42)))));
}

#[test]
fn multiple_items_become_or() {
    let schema = test_schema();
    let simplify = Simplify::new(&schema);

    // `any(map([1, 2], x => x)) → or(1, 2)`
    let expr = any_of(map_expr(
        value_list(vec![Value::from(1i64), Value::from(2i64)]),
        Expr::arg(0),
    ));
    let result = simplify.simplify_expr_any(&expr);

    assert!(matches!(
        result,
        Some(Expr::Or(ExprOr { operands }))
            if operands.len() == 2
                && operands[0] == Expr::Value(Value::from(1i64))
                && operands[1] == Expr::Value(Value::from(2i64))
    ));
}