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
153
154
155
156

use indexmap::IndexMap;

use crate::{CoverageSummary, FileCoverage};

/// a map of `FileCoverage` objects keyed by file paths
#[derive(Clone, PartialEq, Default)]
pub struct CoverageMap {
    inner: IndexMap<String, FileCoverage>,
}

impl CoverageMap {
    pub fn new() -> CoverageMap {
        CoverageMap {
            inner: Default::default(),
        }
    }

    pub fn default() -> CoverageMap {
        CoverageMap {
            inner: Default::default(),
        }
    }

    pub fn from_iter<'a>(value: impl IntoIterator<Item = &'a FileCoverage>) -> CoverageMap {
        let mut ret = CoverageMap {
            inner: Default::default(),
        };

        for coverage in value.into_iter() {
            ret.add_coverage_for_file(coverage)
        }

        ret
    }

    /// Merges a second coverage map into this one
    pub fn merge(&mut self, map: &CoverageMap) {
        for (_, coverage) in map.inner.iter() {
            self.add_coverage_for_file(coverage);
        }
    }

    /// Filter the coverage map with a predicate. If the predicate returns false,
    /// the coverage is removed from the map.
    pub fn filter(&mut self, predicate: impl Fn(&FileCoverage) -> bool) {
        let mut filtered: IndexMap<String, FileCoverage> = Default::default();

        for (_, coverage) in self.inner.drain(..) {
            if predicate(&coverage) {
                filtered.insert(coverage.path.clone(), coverage);
            }
        }

        self.inner = filtered;
    }

    pub fn to_json() {
        unimplemented!()
    }

    pub fn get_files(&self) -> Vec<&String> {
        self.inner.keys().collect()
    }

    pub fn get_coverage_for_file(&self, file_path: &str) -> Option<&FileCoverage> {
        self.inner.get(file_path)
    }

    pub fn add_coverage_for_file(&mut self, coverage: &FileCoverage) {
        if let Some(value) = self.inner.get_mut(coverage.path.as_str()) {
            value.merge(coverage);
        } else {
            self.inner.insert(coverage.path.clone(), coverage.clone());
        }
    }

    pub fn get_coverage_summary(&self) -> CoverageSummary {
        let mut ret: CoverageSummary = Default::default();

        for coverage in self.inner.values() {
            ret.merge(&coverage.to_summary());
        }

        ret
    }
}

#[cfg(test)]
mod tests {
    use crate::{CoverageMap, FileCoverage};

    #[test]
    fn should_able_to_merge_another_coverage_map() {
        let mut base = CoverageMap::from_iter(vec![
            &FileCoverage::from_file_path("foo.js".to_string(), false),
            &FileCoverage::from_file_path("bar.js".to_string(), false),
        ]);

        let second = CoverageMap::from_iter(vec![
            &FileCoverage::from_file_path("foo.js".to_string(), false),
            &FileCoverage::from_file_path("baz.js".to_string(), false),
        ]);
        base.merge(&second);
        assert_eq!(
            base.get_files(),
            vec![
                &"foo.js".to_string(),
                &"bar.js".to_string(),
                &"baz.js".to_string()
            ]
        );
    }

    #[test]
    fn should_able_to_return_file_coverage() {
        let base = CoverageMap::from_iter(vec![
            &FileCoverage::from_file_path("foo.js".to_string(), false),
            &FileCoverage::from_file_path("bar.js".to_string(), false),
        ]);

        assert!(base.get_coverage_for_file("foo.js").is_some());
        assert!(base.get_coverage_for_file("bar.js").is_some());

        assert!(base.get_coverage_for_file("baz.js").is_none());
    }

    #[test]
    fn should_able_to_filter_coverage() {
        let mut base = CoverageMap::from_iter(vec![
            &FileCoverage::from_file_path("foo.js".to_string(), false),
            &FileCoverage::from_file_path("bar.js".to_string(), false),
        ]);

        assert_eq!(
            base.get_files(),
            vec![&"foo.js".to_string(), &"bar.js".to_string()]
        );

        base.filter(|x| x.path == "foo.js");
        assert_eq!(base.get_files(), vec![&"foo.js".to_string()]);
    }

    #[test]
    fn should_return_coverage_summary_for_all_files() {
        let mut base = CoverageMap::from_iter(vec![
            &FileCoverage::from_file_path("foo.js".to_string(), false),
            &FileCoverage::from_file_path("bar.js".to_string(), false),
        ]);

        base.add_coverage_for_file(&FileCoverage::from_file_path("foo.js".to_string(), false));
        base.add_coverage_for_file(&FileCoverage::from_file_path("baz.js".to_string(), false));

        let summary = base.get_coverage_summary();
        assert_eq!(summary.statements.total, 0);
    }
}