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comparison rust/hg-core/src/testing.rs @ 41241:168041fa6d5f

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rust: factorized testing Graphs it will useful to use these outside of `ancestors`, too. Differential Revision: https://phab.mercurial-scm.org/D5579
author Georges Racinet <georges.racinet@octobus.net>
date Mon, 14 Jan 2019 20:42:25 +0100
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children 4c5f6e95df84
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41240:ff333620a4cc 41241:168041fa6d5f
1 // testing.rs
2 //
3 // Copyright 2018 Georges Racinet <georges.racinet@octobus.net>
4 //
5 // This software may be used and distributed according to the terms of the
6 // GNU General Public License version 2 or any later version.
7
8 use crate::{Graph, GraphError, Revision, NULL_REVISION};
9
10 /// A stub `Graph`, same as the one from `test-ancestor.py`
11 ///
12 /// o 13
13 /// |
14 /// | o 12
15 /// | |
16 /// | | o 11
17 /// | | |\
18 /// | | | | o 10
19 /// | | | | |
20 /// | o---+ | 9
21 /// | | | | |
22 /// o | | | | 8
23 /// / / / /
24 /// | | o | 7
25 /// | | | |
26 /// o---+ | 6
27 /// / / /
28 /// | | o 5
29 /// | |/
30 /// | o 4
31 /// | |
32 /// o | 3
33 /// | |
34 /// | o 2
35 /// |/
36 /// o 1
37 /// |
38 /// o 0
39 #[derive(Clone, Debug)]
40 pub struct SampleGraph;
41
42 impl Graph for SampleGraph {
43 fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError> {
44 match rev {
45 0 => Ok([NULL_REVISION, NULL_REVISION]),
46 1 => Ok([0, NULL_REVISION]),
47 2 => Ok([1, NULL_REVISION]),
48 3 => Ok([1, NULL_REVISION]),
49 4 => Ok([2, NULL_REVISION]),
50 5 => Ok([4, NULL_REVISION]),
51 6 => Ok([4, NULL_REVISION]),
52 7 => Ok([4, NULL_REVISION]),
53 8 => Ok([NULL_REVISION, NULL_REVISION]),
54 9 => Ok([6, 7]),
55 10 => Ok([5, NULL_REVISION]),
56 11 => Ok([3, 7]),
57 12 => Ok([9, NULL_REVISION]),
58 13 => Ok([8, NULL_REVISION]),
59 r => Err(GraphError::ParentOutOfRange(r)),
60 }
61 }
62 }
63
64 // A Graph represented by a vector whose indices are revisions
65 // and values are parents of the revisions
66 pub type VecGraph = Vec<[Revision; 2]>;
67
68 impl Graph for VecGraph {
69 fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError> {
70 Ok(self[rev as usize])
71 }
72 }