aboutsummaryrefslogtreecommitdiff
path: root/crates/ra_db/src/fixture.rs
blob: 5ff8ead0e5ed90c071fc1a488b8e7090753bd7a6 (plain)
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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
//! Fixtures are strings containing rust source code with optional metadata.
//! A fixture without metadata is parsed into a single source file.
//! Use this to test functionality local to one file.
//!
//! Simple Example:
//! ```
//! r#"
//! fn main() {
//!     println!("Hello World")
//! }
//! "#
//! ```
//!
//! Metadata can be added to a fixture after a `//-` comment.
//! The basic form is specifying filenames,
//! which is also how to define multiple files in a single test fixture
//!
//! Example using two files in the same crate:
//! ```
//! "
//! //- /main.rs
//! mod foo;
//! fn main() {
//!     foo::bar();
//! }
//!
//! //- /foo.rs
//! pub fn bar() {}
//! "
//! ```
//!
//! Example using two crates with one file each, with one crate depending on the other:
//! ```
//! r#"
//! //- /main.rs crate:a deps:b
//! fn main() {
//!     b::foo();
//! }
//! //- /lib.rs crate:b
//! pub fn b() {
//!     println!("Hello World")
//! }
//! "#
//! ```
//!
//! Metadata allows specifying all settings and variables
//! that are available in a real rust project:
//! - crate names via `crate:cratename`
//! - dependencies via `deps:dep1,dep2`
//! - configuration settings via `cfg:dbg=false,opt_level=2`
//! - environment variables via `env:PATH=/bin,RUST_LOG=debug`
//!
//! Example using all available metadata:
//! ```
//! "
//! //- /lib.rs crate:foo deps:bar,baz cfg:foo=a,bar=b env:OUTDIR=path/to,OTHER=foo
//! fn insert_source_code_here() {}
//! "
//! ```
use std::{str::FromStr, sync::Arc};

use cfg::CfgOptions;
use rustc_hash::FxHashMap;
use test_utils::{extract_range_or_offset, Fixture, RangeOrOffset, CURSOR_MARKER};
use vfs::{file_set::FileSet, VfsPath};

use crate::{
    input::CrateName, CrateGraph, CrateId, Edition, Env, FileId, FilePosition, SourceDatabaseExt,
    SourceRoot, SourceRootId,
};

pub const WORKSPACE: SourceRootId = SourceRootId(0);

pub trait WithFixture: Default + SourceDatabaseExt + 'static {
    fn with_single_file(text: &str) -> (Self, FileId) {
        let mut db = Self::default();
        let (_, files) = with_files(&mut db, text);
        assert_eq!(files.len(), 1);
        (db, files[0])
    }

    fn with_files(ra_fixture: &str) -> Self {
        let mut db = Self::default();
        let (pos, _) = with_files(&mut db, ra_fixture);
        assert!(pos.is_none());
        db
    }

    fn with_position(ra_fixture: &str) -> (Self, FilePosition) {
        let (db, file_id, range_or_offset) = Self::with_range_or_offset(ra_fixture);
        let offset = match range_or_offset {
            RangeOrOffset::Range(_) => panic!(),
            RangeOrOffset::Offset(it) => it,
        };
        (db, FilePosition { file_id, offset })
    }

    fn with_range_or_offset(ra_fixture: &str) -> (Self, FileId, RangeOrOffset) {
        let mut db = Self::default();
        let (pos, _) = with_files(&mut db, ra_fixture);
        let (file_id, range_or_offset) = pos.unwrap();
        (db, file_id, range_or_offset)
    }

    fn test_crate(&self) -> CrateId {
        let crate_graph = self.crate_graph();
        let mut it = crate_graph.iter();
        let res = it.next().unwrap();
        assert!(it.next().is_none());
        res
    }
}

impl<DB: SourceDatabaseExt + Default + 'static> WithFixture for DB {}

fn with_files(
    db: &mut dyn SourceDatabaseExt,
    fixture: &str,
) -> (Option<(FileId, RangeOrOffset)>, Vec<FileId>) {
    let fixture = Fixture::parse(fixture);

    let mut files = Vec::new();
    let mut crate_graph = CrateGraph::default();
    let mut crates = FxHashMap::default();
    let mut crate_deps = Vec::new();
    let mut default_crate_root: Option<FileId> = None;

    let mut file_set = FileSet::default();
    let source_root_id = WORKSPACE;
    let source_root_prefix = "/".to_string();
    let mut file_id = FileId(0);

    let mut file_position = None;

    for entry in fixture {
        let text = if entry.text.contains(CURSOR_MARKER) {
            let (range_or_offset, text) = extract_range_or_offset(&entry.text);
            assert!(file_position.is_none());
            file_position = Some((file_id, range_or_offset));
            text.to_string()
        } else {
            entry.text.clone()
        };

        let meta = FileMeta::from(entry);
        assert!(meta.path.starts_with(&source_root_prefix));

        if let Some(krate) = meta.krate {
            let crate_id = crate_graph.add_crate_root(
                file_id,
                meta.edition,
                Some(krate.clone()),
                meta.cfg,
                meta.env,
                Default::default(),
            );
            let crate_name = CrateName::new(&krate).unwrap();
            let prev = crates.insert(crate_name.clone(), crate_id);
            assert!(prev.is_none());
            for dep in meta.deps {
                let dep = CrateName::new(&dep).unwrap();
                crate_deps.push((crate_name.clone(), dep))
            }
        } else if meta.path == "/main.rs" || meta.path == "/lib.rs" {
            assert!(default_crate_root.is_none());
            default_crate_root = Some(file_id);
        }

        db.set_file_text(file_id, Arc::new(text));
        db.set_file_source_root(file_id, source_root_id);
        let path = VfsPath::new_virtual_path(meta.path);
        file_set.insert(file_id, path.into());
        files.push(file_id);
        file_id.0 += 1;
    }

    if crates.is_empty() {
        let crate_root = default_crate_root.unwrap();
        crate_graph.add_crate_root(
            crate_root,
            Edition::Edition2018,
            None,
            CfgOptions::default(),
            Env::default(),
            Default::default(),
        );
    } else {
        for (from, to) in crate_deps {
            let from_id = crates[&from];
            let to_id = crates[&to];
            crate_graph.add_dep(from_id, CrateName::new(&to).unwrap(), to_id).unwrap();
        }
    }

    db.set_source_root(source_root_id, Arc::new(SourceRoot::new_local(file_set)));
    db.set_crate_graph(Arc::new(crate_graph));

    (file_position, files)
}

struct FileMeta {
    path: String,
    krate: Option<String>,
    deps: Vec<String>,
    cfg: CfgOptions,
    edition: Edition,
    env: Env,
}

impl From<Fixture> for FileMeta {
    fn from(f: Fixture) -> FileMeta {
        let mut cfg = CfgOptions::default();
        f.cfg_atoms.iter().for_each(|it| cfg.insert_atom(it.into()));
        f.cfg_key_values.iter().for_each(|(k, v)| cfg.insert_key_value(k.into(), v.into()));

        FileMeta {
            path: f.path,
            krate: f.krate,
            deps: f.deps,
            cfg,
            edition: f
                .edition
                .as_ref()
                .map_or(Edition::Edition2018, |v| Edition::from_str(&v).unwrap()),
            env: f.env.into_iter().collect(),
        }
    }
}