238 lines
7.3 KiB
Rust
238 lines
7.3 KiB
Rust
//! Fixtures are strings containing rust source code with optional metadata.
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//! A fixture without metadata is parsed into a single source file.
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//! Use this to test functionality local to one file.
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//!
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//! Simple Example:
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//! ```
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//! r#"
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//! fn main() {
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//! println!("Hello World")
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//! }
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//! "#
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//! ```
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//!
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//! Metadata can be added to a fixture after a `//-` comment.
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//! The basic form is specifying filenames,
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//! which is also how to define multiple files in a single test fixture
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//!
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//! Example using two files in the same crate:
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//! ```
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//! "
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//! //- /main.rs
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//! mod foo;
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//! fn main() {
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//! foo::bar();
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//! }
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//!
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//! //- /foo.rs
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//! pub fn bar() {}
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//! "
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//! ```
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//!
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//! Example using two crates with one file each, with one crate depending on the other:
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//! ```
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//! r#"
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//! //- /main.rs crate:a deps:b
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//! fn main() {
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//! b::foo();
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//! }
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//! //- /lib.rs crate:b
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//! pub fn b() {
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//! println!("Hello World")
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//! }
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//! "#
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//! ```
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//!
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//! Metadata allows specifying all settings and variables
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//! that are available in a real rust project:
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//! - crate names via `crate:cratename`
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//! - dependencies via `deps:dep1,dep2`
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//! - configuration settings via `cfg:dbg=false,opt_level=2`
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//! - environment variables via `env:PATH=/bin,RUST_LOG=debug`
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//!
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//! Example using all available metadata:
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//! ```
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//! "
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//! //- /lib.rs crate:foo deps:bar,baz cfg:foo=a,bar=b env:OUTDIR=path/to,OTHER=foo
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//! fn insert_source_code_here() {}
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//! "
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//! ```
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use std::{str::FromStr, sync::Arc};
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use cfg::CfgOptions;
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use rustc_hash::FxHashMap;
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use test_utils::{extract_range_or_offset, Fixture, RangeOrOffset, CURSOR_MARKER};
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use vfs::{file_set::FileSet, VfsPath};
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use crate::{
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input::CrateName, Change, CrateGraph, CrateId, Edition, Env, FileId, FilePosition,
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SourceDatabaseExt, SourceRoot, SourceRootId,
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};
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pub const WORKSPACE: SourceRootId = SourceRootId(0);
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pub trait WithFixture: Default + SourceDatabaseExt + 'static {
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fn with_single_file(text: &str) -> (Self, FileId) {
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let fixture = ChangeFixture::parse(text);
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let mut db = Self::default();
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fixture.change.apply(&mut db);
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assert_eq!(fixture.files.len(), 1);
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(db, fixture.files[0])
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}
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fn with_files(ra_fixture: &str) -> Self {
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let fixture = ChangeFixture::parse(ra_fixture);
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let mut db = Self::default();
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fixture.change.apply(&mut db);
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assert!(fixture.file_position.is_none());
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db
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}
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fn with_position(ra_fixture: &str) -> (Self, FilePosition) {
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let (db, file_id, range_or_offset) = Self::with_range_or_offset(ra_fixture);
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let offset = match range_or_offset {
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RangeOrOffset::Range(_) => panic!(),
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RangeOrOffset::Offset(it) => it,
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};
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(db, FilePosition { file_id, offset })
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}
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fn with_range_or_offset(ra_fixture: &str) -> (Self, FileId, RangeOrOffset) {
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let fixture = ChangeFixture::parse(ra_fixture);
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let mut db = Self::default();
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fixture.change.apply(&mut db);
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let (file_id, range_or_offset) = fixture.file_position.unwrap();
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(db, file_id, range_or_offset)
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}
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fn test_crate(&self) -> CrateId {
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let crate_graph = self.crate_graph();
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let mut it = crate_graph.iter();
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let res = it.next().unwrap();
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assert!(it.next().is_none());
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res
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}
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}
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impl<DB: SourceDatabaseExt + Default + 'static> WithFixture for DB {}
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pub struct ChangeFixture {
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pub file_position: Option<(FileId, RangeOrOffset)>,
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pub files: Vec<FileId>,
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pub change: Change,
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}
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impl ChangeFixture {
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pub fn parse(ra_fixture: &str) -> ChangeFixture {
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let fixture = Fixture::parse(ra_fixture);
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let mut change = Change::new();
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let mut files = Vec::new();
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let mut crate_graph = CrateGraph::default();
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let mut crates = FxHashMap::default();
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let mut crate_deps = Vec::new();
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let mut default_crate_root: Option<FileId> = None;
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let mut default_cfg = CfgOptions::default();
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let mut file_set = FileSet::default();
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let source_root_prefix = "/".to_string();
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let mut file_id = FileId(0);
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let mut file_position = None;
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for entry in fixture {
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let text = if entry.text.contains(CURSOR_MARKER) {
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let (range_or_offset, text) = extract_range_or_offset(&entry.text);
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assert!(file_position.is_none());
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file_position = Some((file_id, range_or_offset));
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text.to_string()
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} else {
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entry.text.clone()
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};
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let meta = FileMeta::from(entry);
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assert!(meta.path.starts_with(&source_root_prefix));
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if let Some(krate) = meta.krate {
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let crate_name = CrateName::normalize_dashes(&krate);
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let crate_id = crate_graph.add_crate_root(
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file_id,
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meta.edition,
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Some(crate_name.clone()),
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meta.cfg,
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meta.env,
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Default::default(),
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);
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let prev = crates.insert(crate_name.clone(), crate_id);
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assert!(prev.is_none());
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for dep in meta.deps {
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let dep = CrateName::normalize_dashes(&dep);
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crate_deps.push((crate_name.clone(), dep))
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}
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} else if meta.path == "/main.rs" || meta.path == "/lib.rs" {
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assert!(default_crate_root.is_none());
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default_crate_root = Some(file_id);
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default_cfg = meta.cfg;
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}
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change.change_file(file_id, Some(Arc::new(text)));
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let path = VfsPath::new_virtual_path(meta.path);
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file_set.insert(file_id, path.into());
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files.push(file_id);
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file_id.0 += 1;
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}
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if crates.is_empty() {
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let crate_root = default_crate_root.unwrap();
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crate_graph.add_crate_root(
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crate_root,
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Edition::Edition2018,
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Some(CrateName::new("test").unwrap()),
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default_cfg,
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Env::default(),
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Default::default(),
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);
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} else {
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for (from, to) in crate_deps {
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let from_id = crates[&from];
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let to_id = crates[&to];
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crate_graph.add_dep(from_id, CrateName::new(&to).unwrap(), to_id).unwrap();
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}
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}
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change.set_roots(vec![SourceRoot::new_local(file_set)]);
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change.set_crate_graph(crate_graph);
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ChangeFixture { file_position, files, change }
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}
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}
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struct FileMeta {
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path: String,
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krate: Option<String>,
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deps: Vec<String>,
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cfg: CfgOptions,
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edition: Edition,
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env: Env,
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}
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impl From<Fixture> for FileMeta {
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fn from(f: Fixture) -> FileMeta {
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let mut cfg = CfgOptions::default();
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f.cfg_atoms.iter().for_each(|it| cfg.insert_atom(it.into()));
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f.cfg_key_values.iter().for_each(|(k, v)| cfg.insert_key_value(k.into(), v.into()));
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FileMeta {
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path: f.path,
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krate: f.krate,
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deps: f.deps,
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cfg,
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edition: f
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.edition
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.as_ref()
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.map_or(Edition::Edition2018, |v| Edition::from_str(&v).unwrap()),
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env: f.env.into_iter().collect(),
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}
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}
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}
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