greed 0.5.2

A rust tool to automate trades 📈
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

use crate::asset::AssetSymbol;
use crate::tactic::r#for::{ForResult, ForRule};
use crate::tactic::state::TacticState;
use crate::tactic::target::TargetAsset;

#[derive(Debug, Default, PartialEq)]
pub struct ForAnyStockRule {
    stocks: Vec<AssetSymbol>,
}

impl ForAnyStockRule {
    pub fn boxed(stocks: Vec<AssetSymbol>) -> Box<dyn ForRule> {
        Box::new(Self { stocks })
    }
}

impl ForRule for ForAnyStockRule {
    fn evaluate(&self, _state: &TacticState) -> ForResult {
        let percent = 100.0 / (self.stocks.len() as f64);
        let target_assets = self
            .stocks
            .iter()
            .map(|stock| TargetAsset {
                symbol: stock.clone(),
                percent,
            })
            .collect();
        ForResult { target_assets }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn evaluate_empty_stocks() {
        let state: TacticState = Default::default();
        let rule = ForAnyStockRule::boxed(vec![]);
        let result = rule.evaluate(&state);
        let expected = ForResult {
            target_assets: vec![],
        };
        assert_eq!(expected, result)
    }

    #[test]
    fn evaluate_one_stock() {
        let state: TacticState = Default::default();
        let spy = AssetSymbol::new("SPY");
        let rule = ForAnyStockRule::boxed(vec![spy]);
        let result = rule.evaluate(&state);
        let expected = ForResult {
            target_assets: vec![TargetAsset::full_percent(AssetSymbol::new("SPY"))],
        };
        assert_eq!(expected, result)
    }

    #[test]
    fn evaluate_multiple_stocks() {
        let state: TacticState = Default::default();
        let spy = AssetSymbol::new("SPY");
        let vti = AssetSymbol::new("VTI");
        let vea = AssetSymbol::new("VEA");
        let rule = ForAnyStockRule::boxed(vec![spy, vti, vea]);
        let result = rule.evaluate(&state);
        let expected = ForResult {
            target_assets: vec![
                TargetAsset {
                    symbol: AssetSymbol::new("SPY"),
                    percent: 100.0 / 3.0,
                },
                TargetAsset {
                    symbol: AssetSymbol::new("VTI"),
                    percent: 100.0 / 3.0,
                },
                TargetAsset {
                    symbol: AssetSymbol::new("VEA"),
                    percent: 100.0 / 3.0,
                },
            ],
        };
        assert_eq!(expected, result)
    }
}