logic-mesh 1.0.0

Control logic engine using event based and reactive blocks written in Rust.
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

// Copyright (c) 2022-2024, Radu Racariu.

use uuid::Uuid;

use crate::base::{
    block::{Block, BlockDesc, BlockProps, BlockState},
    input::{InputProps, input_reader::InputReader},
    output::Output,
};

use libhaystack::val::kind::HaystackKind;

use crate::{blocks::InputImpl, blocks::OutputImpl};

/// Outputs true if the input is not null.
#[block]
#[derive(BlockProps, Debug)]
#[category = "misc"]
pub struct HasValue {
    #[input(name = "in", kind = "Null")]
    pub input: InputImpl,
    #[output(kind = "Bool")]
    pub out: OutputImpl,
}

impl Block for HasValue {
    async fn execute(&mut self) {
        self.read_inputs_until_ready().await;

        let has_value = self.input.get_value().is_some_and(|val| val.has_value());
        self.out.set(has_value.into());
    }
}

#[cfg(test)]
mod test {

    use libhaystack::val::Value;

    use crate::{
        base::block::Block, base::block::test_utils::write_block_inputs,
        blocks::misc::has_value::HasValue,
    };

    #[tokio::test]
    async fn has_value_true() {
        let mut block = HasValue::new();

        write_block_inputs([(&mut block.input, "test")]).await;

        block.execute().await;
        assert_eq!(block.out.value, true.into());
    }

    #[tokio::test]
    async fn has_value_false() {
        let mut block = HasValue::new();

        write_block_inputs([(&mut block.input, Value::Null)]).await;

        block.execute().await;
        assert_eq!(block.out.value, false.into());
    }
}