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use std::sync::Arc;
use parking_lot::Mutex;
use salsa::{self, Database};
use ra_db::{LocationIntener, BaseDatabase, FilePosition, FileId, WORKSPACE, CrateGraph, SourceRoot};
use relative_path::RelativePathBuf;
use test_utils::{parse_fixture, CURSOR_MARKER, extract_offset};
use crate::{db, DefId, DefLoc};
#[derive(Debug)]
pub(crate) struct MockDatabase {
events: Mutex<Option<Vec<salsa::Event<MockDatabase>>>>,
runtime: salsa::Runtime<MockDatabase>,
id_maps: Arc<IdMaps>,
}
impl MockDatabase {
pub(crate) fn with_files(fixture: &str) -> (MockDatabase, SourceRoot) {
let (db, source_root, position) = MockDatabase::from_fixture(fixture);
assert!(position.is_none());
(db, source_root)
}
pub(crate) fn with_position(fixture: &str) -> (MockDatabase, FilePosition) {
let (db, _, position) = MockDatabase::from_fixture(fixture);
let position = position.expect("expected a marker ( <|> )");
(db, position)
}
pub(crate) fn set_crate_graph(&mut self, crate_graph: CrateGraph) {
self.query_mut(ra_db::CrateGraphQuery)
.set((), Arc::new(crate_graph));
}
fn from_fixture(fixture: &str) -> (MockDatabase, SourceRoot, Option<FilePosition>) {
let mut db = MockDatabase::default();
let mut position = None;
let mut source_root = SourceRoot::default();
for entry in parse_fixture(fixture) {
if entry.text.contains(CURSOR_MARKER) {
assert!(
position.is_none(),
"only one marker (<|>) per fixture is allowed"
);
position =
Some(db.add_file_with_position(&mut source_root, &entry.meta, &entry.text));
} else {
db.add_file(&mut source_root, &entry.meta, &entry.text);
}
}
db.query_mut(ra_db::SourceRootQuery)
.set(WORKSPACE, Arc::new(source_root.clone()));
(db, source_root, position)
}
fn add_file(&mut self, source_root: &mut SourceRoot, path: &str, text: &str) -> FileId {
assert!(path.starts_with('/'));
let path = RelativePathBuf::from_path(&path[1..]).unwrap();
let file_id = FileId(source_root.files.len() as u32);
let text = Arc::new(text.to_string());
self.query_mut(ra_db::FileTextQuery).set(file_id, text);
self.query_mut(ra_db::FileRelativePathQuery)
.set(file_id, path.clone());
self.query_mut(ra_db::FileSourceRootQuery)
.set(file_id, WORKSPACE);
source_root.files.insert(path, file_id);
file_id
}
fn add_file_with_position(
&mut self,
source_root: &mut SourceRoot,
path: &str,
text: &str,
) -> FilePosition {
let (offset, text) = extract_offset(text);
let file_id = self.add_file(source_root, path, &text);
FilePosition { file_id, offset }
}
}
#[derive(Debug, Default)]
struct IdMaps {
defs: LocationIntener<DefLoc, DefId>,
}
impl salsa::Database for MockDatabase {
fn salsa_runtime(&self) -> &salsa::Runtime<MockDatabase> {
&self.runtime
}
fn salsa_event(&self, event: impl Fn() -> salsa::Event<MockDatabase>) {
let mut events = self.events.lock();
if let Some(events) = &mut *events {
events.push(event());
}
}
}
impl Default for MockDatabase {
fn default() -> MockDatabase {
let mut db = MockDatabase {
events: Default::default(),
runtime: salsa::Runtime::default(),
id_maps: Default::default(),
};
db.query_mut(ra_db::SourceRootQuery)
.set(ra_db::WORKSPACE, Default::default());
db.query_mut(ra_db::CrateGraphQuery)
.set((), Default::default());
db.query_mut(ra_db::LibrariesQuery)
.set((), Default::default());
db
}
}
impl salsa::ParallelDatabase for MockDatabase {
fn snapshot(&self) -> salsa::Snapshot<MockDatabase> {
salsa::Snapshot::new(MockDatabase {
events: Default::default(),
runtime: self.runtime.snapshot(self),
id_maps: self.id_maps.clone(),
})
}
}
impl BaseDatabase for MockDatabase {}
impl AsRef<LocationIntener<DefLoc, DefId>> for MockDatabase {
fn as_ref(&self) -> &LocationIntener<DefLoc, DefId> {
&self.id_maps.defs
}
}
impl MockDatabase {
pub(crate) fn log(&self, f: impl FnOnce()) -> Vec<salsa::Event<MockDatabase>> {
*self.events.lock() = Some(Vec::new());
f();
let events = self.events.lock().take().unwrap();
events
}
pub(crate) fn log_executed(&self, f: impl FnOnce()) -> Vec<String> {
let events = self.log(f);
events
.into_iter()
.filter_map(|e| match e.kind {
// This pretty horrible, but `Debug` is the only way to inspect
// QueryDescriptor at the moment.
salsa::EventKind::WillExecute { descriptor } => Some(format!("{:?}", descriptor)),
_ => None,
})
.collect()
}
}
salsa::database_storage! {
pub(crate) struct MockDatabaseStorage for MockDatabase {
impl ra_db::FilesDatabase {
fn file_text() for ra_db::FileTextQuery;
fn file_relative_path() for ra_db::FileRelativePathQuery;
fn file_source_root() for ra_db::FileSourceRootQuery;
fn source_root() for ra_db::SourceRootQuery;
fn libraries() for ra_db::LibrariesQuery;
fn crate_graph() for ra_db::CrateGraphQuery;
}
impl ra_db::SyntaxDatabase {
fn source_file() for ra_db::SourceFileQuery;
fn file_lines() for ra_db::FileLinesQuery;
}
impl db::HirDatabase {
fn module_tree() for db::ModuleTreeQuery;
fn fn_scopes() for db::FnScopesQuery;
fn file_items() for db::SourceFileItemsQuery;
fn file_item() for db::FileItemQuery;
fn input_module_items() for db::InputModuleItemsQuery;
fn item_map() for db::ItemMapQuery;
fn fn_syntax() for db::FnSyntaxQuery;
fn submodules() for db::SubmodulesQuery;
}
}
}
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