kopi 0.2.1

Kopi is a JDK version management tool
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

// Copyright 2025 dentsusoken
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::storage::InstalledJdk;

pub struct JdkSelector;

impl JdkSelector {
    pub fn filter_by_distribution(
        jdks: Vec<InstalledJdk>,
        distribution: &str,
    ) -> Vec<InstalledJdk> {
        jdks.into_iter()
            .filter(|jdk| jdk.distribution.eq_ignore_ascii_case(distribution))
            .collect()
    }

    pub fn format_selection_summary(jdks: &[InstalledJdk]) -> String {
        if jdks.is_empty() {
            return "No JDKs selected".to_string();
        }

        if jdks.len() == 1 {
            return format!("Selected: {}@{}", jdks[0].distribution, jdks[0].version);
        }

        let distributions: std::collections::HashSet<_> =
            jdks.iter().map(|jdk| jdk.distribution.as_str()).collect();

        if distributions.len() == 1 {
            format!(
                "Selected {} {} versions",
                jdks.len(),
                distributions.iter().next().unwrap()
            )
        } else {
            format!("Selected {} JDKs from multiple distributions", jdks.len())
        }
    }
}

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

    #[test]
    fn test_filter_by_distribution() {
        let jdks = vec![
            create_test_jdk("temurin", "21.0.5+11"),
            create_test_jdk("temurin", "17.0.9+9"),
            create_test_jdk("corretto", "21.0.1"),
            create_test_jdk("corretto", "17.0.5"),
        ];

        let temurin_jdks = JdkSelector::filter_by_distribution(jdks.clone(), "temurin");
        assert_eq!(temurin_jdks.len(), 2);
        assert!(temurin_jdks.iter().all(|jdk| jdk.distribution == "temurin"));

        let corretto_jdks = JdkSelector::filter_by_distribution(jdks.clone(), "corretto");
        assert_eq!(corretto_jdks.len(), 2);
        assert!(
            corretto_jdks
                .iter()
                .all(|jdk| jdk.distribution == "corretto")
        );

        let empty_jdks = JdkSelector::filter_by_distribution(jdks, "zulu");
        assert!(empty_jdks.is_empty());
    }

    #[test]
    fn test_filter_case_insensitive() {
        let jdks = vec![
            create_test_jdk("Temurin", "21.0.5+11"),
            create_test_jdk("TEMURIN", "17.0.9+9"),
            create_test_jdk("temurin", "11.0.21+9"),
        ];

        let filtered = JdkSelector::filter_by_distribution(jdks, "temurin");
        assert_eq!(filtered.len(), 3);
    }

    #[test]
    fn test_format_selection_summary() {
        let empty: Vec<InstalledJdk> = vec![];
        assert_eq!(
            JdkSelector::format_selection_summary(&empty),
            "No JDKs selected"
        );

        let single = vec![create_test_jdk("temurin", "21.0.5+11")];
        assert_eq!(
            JdkSelector::format_selection_summary(&single),
            "Selected: temurin@21.0.5+11"
        );

        let multiple_same_dist = vec![
            create_test_jdk("temurin", "21.0.5+11"),
            create_test_jdk("temurin", "17.0.9+9"),
        ];
        assert_eq!(
            JdkSelector::format_selection_summary(&multiple_same_dist),
            "Selected 2 temurin versions"
        );

        let multiple_diff_dist = vec![
            create_test_jdk("temurin", "21.0.5+11"),
            create_test_jdk("corretto", "21.0.1"),
        ];
        assert_eq!(
            JdkSelector::format_selection_summary(&multiple_diff_dist),
            "Selected 2 JDKs from multiple distributions"
        );
    }
}