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|
//! FIXME: write short doc here
use std::sync::Arc;
use base_db::{CrateName, FileSet, SourceRoot, VfsPath};
use cfg::CfgOptions;
use test_utils::{
extract_annotations, extract_range_or_offset, Fixture, RangeOrOffset, CURSOR_MARKER,
};
use crate::{Analysis, AnalysisHost, Change, CrateGraph, Edition, FileId, FilePosition, FileRange};
/// Mock analysis is used in test to bootstrap an AnalysisHost/Analysis
/// from a set of in-memory files.
#[derive(Debug, Default)]
pub(crate) struct MockAnalysis {
files: Vec<Fixture>,
}
impl MockAnalysis {
/// Creates `MockAnalysis` using a fixture data in the following format:
///
/// ```not_rust
/// //- /main.rs
/// mod foo;
/// fn main() {}
///
/// //- /foo.rs
/// struct Baz;
/// ```
pub(crate) fn with_files(ra_fixture: &str) -> MockAnalysis {
let (res, pos) = MockAnalysis::with_fixture(ra_fixture);
assert!(pos.is_none());
res
}
/// Same as `with_files`, but requires that a single file contains a `<|>` marker,
/// whose position is also returned.
pub(crate) fn with_files_and_position(fixture: &str) -> (MockAnalysis, FilePosition) {
let (res, position) = MockAnalysis::with_fixture(fixture);
let (file_id, range_or_offset) = position.expect("expected a marker (<|>)");
let offset = match range_or_offset {
RangeOrOffset::Range(_) => panic!(),
RangeOrOffset::Offset(it) => it,
};
(res, FilePosition { file_id, offset })
}
fn with_fixture(fixture: &str) -> (MockAnalysis, Option<(FileId, RangeOrOffset)>) {
let mut position = None;
let mut res = MockAnalysis::default();
for mut entry in Fixture::parse(fixture) {
if entry.text.contains(CURSOR_MARKER) {
assert!(position.is_none(), "only one marker (<|>) per fixture is allowed");
let (range_or_offset, text) = extract_range_or_offset(&entry.text);
entry.text = text;
let file_id = res.add_file_fixture(entry);
position = Some((file_id, range_or_offset));
} else {
res.add_file_fixture(entry);
}
}
(res, position)
}
fn add_file_fixture(&mut self, fixture: Fixture) -> FileId {
let file_id = FileId((self.files.len() + 1) as u32);
self.files.push(fixture);
file_id
}
pub(crate) fn id_of(&self, path: &str) -> FileId {
let (file_id, _) =
self.files().find(|(_, data)| path == data.path).expect("no file in this mock");
file_id
}
pub(crate) fn annotations(&self) -> Vec<(FileRange, String)> {
self.files()
.flat_map(|(file_id, fixture)| {
let annotations = extract_annotations(&fixture.text);
annotations
.into_iter()
.map(move |(range, data)| (FileRange { file_id, range }, data))
})
.collect()
}
pub(crate) fn files(&self) -> impl Iterator<Item = (FileId, &Fixture)> + '_ {
self.files.iter().enumerate().map(|(idx, fixture)| (FileId(idx as u32 + 1), fixture))
}
pub(crate) fn annotation(&self) -> (FileRange, String) {
let mut all = self.annotations();
assert_eq!(all.len(), 1);
all.pop().unwrap()
}
pub(crate) fn analysis_host(self) -> AnalysisHost {
let mut host = AnalysisHost::default();
let mut change = Change::new();
let mut file_set = FileSet::default();
let mut crate_graph = CrateGraph::default();
let mut root_crate = None;
for (i, data) in self.files.into_iter().enumerate() {
let path = data.path;
assert!(path.starts_with('/'));
let mut cfg = CfgOptions::default();
data.cfg_atoms.iter().for_each(|it| cfg.insert_atom(it.into()));
data.cfg_key_values.iter().for_each(|(k, v)| cfg.insert_key_value(k.into(), v.into()));
let edition: Edition =
data.edition.and_then(|it| it.parse().ok()).unwrap_or(Edition::Edition2018);
let file_id = FileId(i as u32 + 1);
let env = data.env.into_iter().collect();
if path == "/lib.rs" || path == "/main.rs" {
root_crate = Some(crate_graph.add_crate_root(
file_id,
edition,
Some("test".to_string()),
cfg,
env,
Default::default(),
));
} else if path.ends_with("/lib.rs") {
let base = &path[..path.len() - "/lib.rs".len()];
let crate_name = &base[base.rfind('/').unwrap() + '/'.len_utf8()..];
let other_crate = crate_graph.add_crate_root(
file_id,
edition,
Some(crate_name.to_string()),
cfg,
env,
Default::default(),
);
if let Some(root_crate) = root_crate {
crate_graph
.add_dep(root_crate, CrateName::new(crate_name).unwrap(), other_crate)
.unwrap();
}
}
let path = VfsPath::new_virtual_path(path.to_string());
file_set.insert(file_id, path);
change.change_file(file_id, Some(Arc::new(data.text).to_owned()));
}
change.set_crate_graph(crate_graph);
change.set_roots(vec![SourceRoot::new_local(file_set)]);
host.apply_change(change);
host
}
pub(crate) fn analysis(self) -> Analysis {
self.analysis_host().analysis()
}
}
/// Creates analysis from a multi-file fixture, returns positions marked with <|>.
pub(crate) fn analysis_and_position(ra_fixture: &str) -> (Analysis, FilePosition) {
let (mock, position) = MockAnalysis::with_files_and_position(ra_fixture);
(mock.analysis(), position)
}
/// Creates analysis for a single file.
pub(crate) fn single_file(ra_fixture: &str) -> (Analysis, FileId) {
let mock = MockAnalysis::with_files(ra_fixture);
let file_id = mock.id_of("/main.rs");
(mock.analysis(), file_id)
}
/// Creates analysis for a single file, returns range marked with a pair of <|>.
pub(crate) fn analysis_and_range(ra_fixture: &str) -> (Analysis, FileRange) {
let (res, position) = MockAnalysis::with_fixture(ra_fixture);
let (file_id, range_or_offset) = position.expect("expected a marker (<|>)");
let range = match range_or_offset {
RangeOrOffset::Range(it) => it,
RangeOrOffset::Offset(_) => panic!(),
};
(res.analysis(), FileRange { file_id, range })
}
|
