Merge #5011

5011: Simplify fixtures r=matklad a=matklad

bors r+
🤖

Co-authored-by: Aleksey Kladov <[email protected]>

8 files changed, 273 insertions, 375 deletions

diff --git a/Cargo.lock b/Cargo.lock
index f2069c55e..9ea1765cb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1664,7 +1664,6 @@ name = "test_utils"
 version = "0.1.0"
 dependencies = [
  "difference",
- "ra_cfg",
  "rustc-hash",
  "serde_json",
  "stdx",
diff --git a/crates/ra_db/src/fixture.rs b/crates/ra_db/src/fixture.rs
index f7d9118a9..20f291568 100644
--- a/crates/ra_db/src/fixture.rs
+++ b/crates/ra_db/src/fixture.rs
@@ -61,7 +61,7 @@ use std::{str::FromStr, sync::Arc};
 
 use ra_cfg::CfgOptions;
 use rustc_hash::FxHashMap;
-use test_utils::{extract_offset, parse_fixture, parse_single_fixture, FixtureMeta, CURSOR_MARKER};
+use test_utils::{extract_offset, Fixture, CURSOR_MARKER};
 use vfs::{file_set::FileSet, VfsPath};
 
 use crate::{
@@ -80,14 +80,14 @@ pub trait WithFixture: Default + SourceDatabaseExt + 'static {
 
     fn with_files(ra_fixture: &str) -> Self {
         let mut db = Self::default();
-        let pos = with_files(&mut db, ra_fixture);
+        let (pos, _) = with_files(&mut db, ra_fixture);
         assert!(pos.is_none());
         db
     }
 
     fn with_position(ra_fixture: &str) -> (Self, FilePosition) {
         let mut db = Self::default();
-        let pos = with_files(&mut db, ra_fixture);
+        let (pos, _) = with_files(&mut db, ra_fixture);
         (db, pos.unwrap())
     }
 
@@ -109,12 +109,10 @@ fn with_single_file(db: &mut dyn SourceDatabaseExt, ra_fixture: &str) -> FileId
 
     let source_root = SourceRoot::new_local(file_set);
 
-    let fixture = parse_single_fixture(ra_fixture);
-
-    let crate_graph = if let Some(entry) = fixture {
-        let meta = match ParsedMeta::from(&entry.meta) {
+    let crate_graph = if let Some(meta) = ra_fixture.lines().find(|it| it.contains("//-")) {
+        let entry = Fixture::parse_single(meta.trim());
+        let meta = match ParsedMeta::from(&entry) {
             ParsedMeta::File(it) => it,
-            _ => panic!("with_single_file only support file meta"),
         };
 
         let mut crate_graph = CrateGraph::default();
@@ -150,30 +148,27 @@ fn with_single_file(db: &mut dyn SourceDatabaseExt, ra_fixture: &str) -> FileId
     file_id
 }
 
-fn with_files(db: &mut dyn SourceDatabaseExt, fixture: &str) -> Option<FilePosition> {
-    let fixture = parse_fixture(fixture);
+fn with_files(
+    db: &mut dyn SourceDatabaseExt,
+    fixture: &str,
+) -> (Option<FilePosition>, 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 mut source_root_id = WORKSPACE;
-    let mut source_root_prefix = "/".to_string();
+    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.iter() {
-        let meta = match ParsedMeta::from(&entry.meta) {
-            ParsedMeta::Root { path } => {
-                let file_set = std::mem::replace(&mut file_set, FileSet::default());
-                db.set_source_root(source_root_id, Arc::new(SourceRoot::new_local(file_set)));
-                source_root_id.0 += 1;
-                source_root_prefix = path;
-                continue;
-            }
+        let meta = match ParsedMeta::from(entry) {
             ParsedMeta::File(it) => it,
         };
         assert!(meta.path.starts_with(&source_root_prefix));
@@ -210,7 +205,7 @@ fn with_files(db: &mut dyn SourceDatabaseExt, fixture: &str) -> Option<FilePosit
         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;
     }
 
@@ -235,11 +230,10 @@ fn with_files(db: &mut dyn SourceDatabaseExt, fixture: &str) -> Option<FilePosit
     db.set_source_root(source_root_id, Arc::new(SourceRoot::new_local(file_set)));
     db.set_crate_graph(Arc::new(crate_graph));
 
-    file_position
+    (file_position, files)
 }
 
 enum ParsedMeta {
-    Root { path: String },
     File(FileMeta),
 }
 
@@ -252,25 +246,22 @@ struct FileMeta {
     env: Env,
 }
 
-impl From<&FixtureMeta> for ParsedMeta {
-    fn from(meta: &FixtureMeta) -> Self {
-        match meta {
-            FixtureMeta::Root { path } => {
-                // `Self::Root` causes a false warning: 'variant is never constructed: `Root` '
-                // see https://github.com/rust-lang/rust/issues/69018
-                ParsedMeta::Root { path: path.to_owned() }
-            }
-            FixtureMeta::File(f) => Self::File(FileMeta {
-                path: f.path.to_owned(),
-                krate: f.crate_name.to_owned(),
-                deps: f.deps.to_owned(),
-                cfg: f.cfg.to_owned(),
-                edition: f
-                    .edition
-                    .as_ref()
-                    .map_or(Edition::Edition2018, |v| Edition::from_str(&v).unwrap()),
-                env: Env::from(f.env.iter()),
-            }),
-        }
+impl From<&Fixture> for ParsedMeta {
+    fn from(f: &Fixture) -> Self {
+        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()));
+
+        Self::File(FileMeta {
+            path: f.path.to_owned(),
+            krate: f.crate_name.to_owned(),
+            deps: f.deps.to_owned(),
+            cfg,
+            edition: f
+                .edition
+                .as_ref()
+                .map_or(Edition::Edition2018, |v| Edition::from_str(&v).unwrap()),
+            env: Env::from(f.env.iter()),
+        })
     }
 }
diff --git a/crates/ra_hir_def/src/nameres/tests.rs b/crates/ra_hir_def/src/nameres/tests.rs
index 05cd0297d..503099fb7 100644
--- a/crates/ra_hir_def/src/nameres/tests.rs
+++ b/crates/ra_hir_def/src/nameres/tests.rs
@@ -424,31 +424,6 @@ fn extern_crate_rename_2015_edition() {
 }
 
 #[test]
-fn import_across_source_roots() {
-    let map = def_map(
-        "
-        //- /main.rs crate:main deps:test_crate
-        use test_crate::a::b::C;
-
-        //- root /test_crate/
-
-        //- /test_crate/lib.rs crate:test_crate
-        pub mod a {
-            pub mod b {
-                pub struct C;
-            }
-        }
-
-        ",
-    );
-
-    assert_snapshot!(map, @r###"
-        ⋮crate
-        ⋮C: t v
-    "###);
-}
-
-#[test]
 fn reexport_across_crates() {
     let map = def_map(
         "
diff --git a/crates/ra_ide/src/mock_analysis.rs b/crates/ra_ide/src/mock_analysis.rs
index 58fafecab..981bdf924 100644
--- a/crates/ra_ide/src/mock_analysis.rs
+++ b/crates/ra_ide/src/mock_analysis.rs
@@ -3,7 +3,7 @@ use std::{str::FromStr, sync::Arc};
 
 use ra_cfg::CfgOptions;
 use ra_db::{CrateName, Env, FileSet, SourceRoot, VfsPath};
-use test_utils::{extract_offset, extract_range, parse_fixture, FixtureEntry, CURSOR_MARKER};
+use test_utils::{extract_offset, extract_range, Fixture, CURSOR_MARKER};
 
 use crate::{
     Analysis, AnalysisChange, AnalysisHost, CrateGraph, Edition, FileId, FilePosition, FileRange,
@@ -12,7 +12,7 @@ use crate::{
 #[derive(Debug)]
 enum MockFileData {
     Plain { path: String, content: String },
-    Fixture(FixtureEntry),
+    Fixture(Fixture),
 }
 
 impl MockFileData {
@@ -25,7 +25,7 @@ impl MockFileData {
     fn path(&self) -> &str {
         match self {
             MockFileData::Plain { path, .. } => path.as_str(),
-            MockFileData::Fixture(f) => f.meta.path(),
+            MockFileData::Fixture(f) => f.path.as_str(),
         }
     }
 
@@ -39,7 +39,10 @@ impl MockFileData {
     fn cfg_options(&self) -> CfgOptions {
         match self {
             MockFileData::Fixture(f) => {
-                f.meta.cfg_options().map_or_else(Default::default, |o| o.clone())
+                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()));
+                cfg
             }
             _ => CfgOptions::default(),
         }
@@ -48,7 +51,7 @@ impl MockFileData {
     fn edition(&self) -> Edition {
         match self {
             MockFileData::Fixture(f) => {
-                f.meta.edition().map_or(Edition::Edition2018, |v| Edition::from_str(v).unwrap())
+                f.edition.as_ref().map_or(Edition::Edition2018, |v| Edition::from_str(&v).unwrap())
             }
             _ => Edition::Edition2018,
         }
@@ -56,14 +59,14 @@ impl MockFileData {
 
     fn env(&self) -> Env {
         match self {
-            MockFileData::Fixture(f) => Env::from(f.meta.env()),
+            MockFileData::Fixture(f) => Env::from(f.env.iter()),
             _ => Env::default(),
         }
     }
 }
 
-impl From<FixtureEntry> for MockFileData {
-    fn from(fixture: FixtureEntry) -> Self {
+impl From<Fixture> for MockFileData {
+    fn from(fixture: Fixture) -> Self {
         Self::Fixture(fixture)
     }
 }
@@ -91,7 +94,7 @@ impl MockAnalysis {
     /// ```
     pub fn with_files(fixture: &str) -> MockAnalysis {
         let mut res = MockAnalysis::new();
-        for entry in parse_fixture(fixture) {
+        for entry in Fixture::parse(fixture) {
             res.add_file_fixture(entry);
         }
         res
@@ -102,7 +105,7 @@ impl MockAnalysis {
     pub fn with_files_and_position(fixture: &str) -> (MockAnalysis, FilePosition) {
         let mut position = None;
         let mut res = MockAnalysis::new();
-        for entry in parse_fixture(fixture) {
+        for entry in Fixture::parse(fixture) {
             if entry.text.contains(CURSOR_MARKER) {
                 assert!(position.is_none(), "only one marker (<|>) per fixture is allowed");
                 position = Some(res.add_file_fixture_with_position(entry));
@@ -114,13 +117,13 @@ impl MockAnalysis {
         (res, position)
     }
 
-    pub fn add_file_fixture(&mut self, fixture: FixtureEntry) -> FileId {
+    pub fn add_file_fixture(&mut self, fixture: Fixture) -> FileId {
         let file_id = self.next_id();
         self.files.push(MockFileData::from(fixture));
         file_id
     }
 
-    pub fn add_file_fixture_with_position(&mut self, mut fixture: FixtureEntry) -> FilePosition {
+    pub fn add_file_fixture_with_position(&mut self, mut fixture: Fixture) -> FilePosition {
         let (offset, text) = extract_offset(&fixture.text);
         fixture.text = text;
         let file_id = self.next_id();
diff --git a/crates/rust-analyzer/tests/heavy_tests/support.rs b/crates/rust-analyzer/tests/heavy_tests/support.rs
index bb8585355..e80ffe5d1 100644
--- a/crates/rust-analyzer/tests/heavy_tests/support.rs
+++ b/crates/rust-analyzer/tests/heavy_tests/support.rs
@@ -17,7 +17,7 @@ use lsp_types::{ProgressParams, ProgressParamsValue};
 use serde::Serialize;
 use serde_json::{to_string_pretty, Value};
 use tempfile::TempDir;
-use test_utils::{find_mismatch, parse_fixture};
+use test_utils::{find_mismatch, Fixture};
 
 use ra_project_model::ProjectManifest;
 use rust_analyzer::{
@@ -68,8 +68,8 @@ impl<'a> Project<'a> {
 
         let mut paths = vec![];
 
-        for entry in parse_fixture(self.fixture) {
-            let path = tmp_dir.path().join(&entry.meta.path()['/'.len_utf8()..]);
+        for entry in Fixture::parse(self.fixture) {
+            let path = tmp_dir.path().join(&entry.path['/'.len_utf8()..]);
             fs::create_dir_all(path.parent().unwrap()).unwrap();
             fs::write(path.as_path(), entry.text.as_bytes()).unwrap();
             paths.push((path, entry.text));
diff --git a/crates/test_utils/Cargo.toml b/crates/test_utils/Cargo.toml
index afd2005f8..6821db1e8 100644
--- a/crates/test_utils/Cargo.toml
+++ b/crates/test_utils/Cargo.toml
@@ -8,10 +8,9 @@ authors = ["rust-analyzer developers"]
 doctest = false
 
 [dependencies]
+# Avoid adding deps here, this crate is widely used in tests it should compile fast!
 difference = "2.0.0"
 text-size = "1.0.0"
 serde_json = "1.0.48"
 rustc-hash = "1.1.0"
-
-ra_cfg = { path = "../ra_cfg" }
 stdx = { path = "../stdx" }
diff --git a/crates/test_utils/src/fixture.rs b/crates/test_utils/src/fixture.rs
new file mode 100644
index 000000000..9108e49d9
--- /dev/null
+++ b/crates/test_utils/src/fixture.rs
@@ -0,0 +1,216 @@
+//! Defines `Fixture` -- a convenient way to describe the initial state of
+//! rust-analyzer database from a single string.
+
+use rustc_hash::FxHashMap;
+use stdx::split1;
+
+#[derive(Debug, Eq, PartialEq)]
+pub struct Fixture {
+    pub path: String,
+    pub text: String,
+    pub crate_name: Option<String>,
+    pub deps: Vec<String>,
+    pub cfg_atoms: Vec<String>,
+    pub cfg_key_values: Vec<(String, String)>,
+    pub edition: Option<String>,
+    pub env: FxHashMap<String, String>,
+}
+
+impl Fixture {
+    /// Parses text which looks like this:
+    ///
+    ///  ```not_rust
+    ///  //- some meta
+    ///  line 1
+    ///  line 2
+    ///  // - other meta
+    ///  ```
+    pub fn parse(ra_fixture: &str) -> Vec<Fixture> {
+        let fixture = indent_first_line(ra_fixture);
+        let margin = fixture_margin(&fixture);
+
+        let mut lines = fixture
+        .split('\n') // don't use `.lines` to not drop `\r\n`
+        .enumerate()
+        .filter_map(|(ix, line)| {
+            if line.len() >= margin {
+                assert!(line[..margin].trim().is_empty());
+                let line_content = &line[margin..];
+                if !line_content.starts_with("//-") {
+                    assert!(
+                        !line_content.contains("//-"),
+                        r#"Metadata line {} has invalid indentation. All metadata lines need to have the same indentation.
+The offending line: {:?}"#,
+                        ix,
+                        line
+                    );
+                }
+                Some(line_content)
+            } else {
+                assert!(line.trim().is_empty());
+                None
+            }
+        });
+
+        let mut res: Vec<Fixture> = Vec::new();
+        for line in lines.by_ref() {
+            if line.starts_with("//-") {
+                let meta = Fixture::parse_single(line);
+                res.push(meta)
+            } else if let Some(entry) = res.last_mut() {
+                entry.text.push_str(line);
+                entry.text.push('\n');
+            }
+        }
+        res
+    }
+
+    //- /lib.rs crate:foo deps:bar,baz cfg:foo=a,bar=b env:OUTDIR=path/to,OTHER=foo
+    pub fn parse_single(meta: &str) -> Fixture {
+        assert!(meta.starts_with("//-"));
+        let meta = meta["//-".len()..].trim();
+        let components = meta.split_ascii_whitespace().collect::<Vec<_>>();
+
+        let path = components[0].to_string();
+        assert!(path.starts_with("/"));
+
+        let mut krate = None;
+        let mut deps = Vec::new();
+        let mut edition = None;
+        let mut cfg_atoms = Vec::new();
+        let mut cfg_key_values = Vec::new();
+        let mut env = FxHashMap::default();
+        for component in components[1..].iter() {
+            let (key, value) = split1(component, ':').unwrap();
+            match key {
+                "crate" => krate = Some(value.to_string()),
+                "deps" => deps = value.split(',').map(|it| it.to_string()).collect(),
+                "edition" => edition = Some(value.to_string()),
+                "cfg" => {
+                    for entry in value.split(',') {
+                        match split1(entry, '=') {
+                            Some((k, v)) => cfg_key_values.push((k.to_string(), v.to_string())),
+                            None => cfg_atoms.push(entry.to_string()),
+                        }
+                    }
+                }
+                "env" => {
+                    for key in value.split(',') {
+                        if let Some((k, v)) = split1(key, '=') {
+                            env.insert(k.into(), v.into());
+                        }
+                    }
+                }
+                _ => panic!("bad component: {:?}", component),
+            }
+        }
+
+        Fixture {
+            path,
+            text: String::new(),
+            crate_name: krate,
+            deps,
+            cfg_atoms,
+            cfg_key_values,
+            edition,
+            env,
+        }
+    }
+}
+
+/// Adjusts the indentation of the first line to the minimum indentation of the rest of the lines.
+/// This allows fixtures to start off in a different indentation, e.g. to align the first line with
+/// the other lines visually:
+/// ```
+/// let fixture = "//- /lib.rs
+///                mod foo;
+///                //- /foo.rs
+///                fn bar() {}
+/// ";
+/// assert_eq!(fixture_margin(fixture),
+/// "               //- /lib.rs
+///                mod foo;
+///                //- /foo.rs
+///                fn bar() {}
+/// ")
+/// ```
+fn indent_first_line(fixture: &str) -> String {
+    if fixture.is_empty() {
+        return String::new();
+    }
+    let mut lines = fixture.lines();
+    let first_line = lines.next().unwrap();
+    if first_line.contains("//-") {
+        let rest = lines.collect::<Vec<_>>().join("\n");
+        let fixed_margin = fixture_margin(&rest);
+        let fixed_indent = fixed_margin - indent_len(first_line);
+        format!("\n{}{}\n{}", " ".repeat(fixed_indent), first_line, rest)
+    } else {
+        fixture.to_owned()
+    }
+}
+
+fn fixture_margin(fixture: &str) -> usize {
+    fixture
+        .lines()
+        .filter(|it| it.trim_start().starts_with("//-"))
+        .map(indent_len)
+        .next()
+        .expect("empty fixture")
+}
+
+fn indent_len(s: &str) -> usize {
+    s.len() - s.trim_start().len()
+}
+
+#[test]
+#[should_panic]
+fn parse_fixture_checks_further_indented_metadata() {
+    Fixture::parse(
+        r"
+        //- /lib.rs
+          mod bar;
+
+          fn foo() {}
+          //- /bar.rs
+          pub fn baz() {}
+          ",
+    );
+}
+
+#[test]
+fn parse_fixture_can_handle_dedented_first_line() {
+    let fixture = "//- /lib.rs
+                   mod foo;
+                   //- /foo.rs
+                   struct Bar;
+";
+    assert_eq!(
+        Fixture::parse(fixture),
+        Fixture::parse(
+            "//- /lib.rs
+mod foo;
+//- /foo.rs
+struct Bar;
+"
+        )
+    )
+}
+
+#[test]
+fn parse_fixture_gets_full_meta() {
+    let parsed = Fixture::parse(
+        r"
+    //- /lib.rs crate:foo deps:bar,baz cfg:foo=a,bar=b,atom env:OUTDIR=path/to,OTHER=foo
+    mod m;
+    ",
+    );
+    assert_eq!(1, parsed.len());
+
+    let meta = &parsed[0];
+    assert_eq!("mod m;\n\n", meta.text);
+
+    assert_eq!("foo", meta.crate_name.as_ref().unwrap());
+    assert_eq!("/lib.rs", meta.path);
+    assert_eq!(2, meta.env.len());
+}
diff --git a/crates/test_utils/src/lib.rs b/crates/test_utils/src/lib.rs
index fd917e43b..3fd8505ed 100644
--- a/crates/test_utils/src/lib.rs
+++ b/crates/test_utils/src/lib.rs
@@ -8,6 +8,7 @@
 
 #[macro_use]
 pub mod mark;
+mod fixture;
 
 use std::{
     env, fs,
@@ -15,13 +16,12 @@ use std::{
 };
 
 use serde_json::Value;
-use stdx::split1;
 use text_size::{TextRange, TextSize};
 
-pub use ra_cfg::CfgOptions;
+pub use difference::Changeset as __Changeset;
 pub use rustc_hash::FxHashMap;
 
-pub use difference::Changeset as __Changeset;
+pub use crate::fixture::Fixture;
 
 pub const CURSOR_MARKER: &str = "<|>";
 
@@ -97,7 +97,7 @@ impl From<RangeOrOffset> for TextRange {
     fn from(selection: RangeOrOffset) -> Self {
         match selection {
             RangeOrOffset::Range(it) => it,
-            RangeOrOffset::Offset(it) => TextRange::new(it, it),
+            RangeOrOffset::Offset(it) => TextRange::empty(it),
         }
     }
 }
@@ -159,291 +159,6 @@ pub fn add_cursor(text: &str, offset: TextSize) -> String {
     res
 }
 
-#[derive(Debug, Eq, PartialEq)]
-pub struct FixtureEntry {
-    pub meta: FixtureMeta,
-    pub text: String,
-}
-
-#[derive(Debug, Eq, PartialEq)]
-pub enum FixtureMeta {
-    Root { path: String },
-    File(FileMeta),
-}
-
-#[derive(Debug, Eq, PartialEq)]
-pub struct FileMeta {
-    pub path: String,
-    pub crate_name: Option<String>,
-    pub deps: Vec<String>,
-    pub cfg: CfgOptions,
-    pub edition: Option<String>,
-    pub env: FxHashMap<String, String>,
-}
-
-impl FixtureMeta {
-    pub fn path(&self) -> &str {
-        match self {
-            FixtureMeta::Root { path } => &path,
-            FixtureMeta::File(f) => &f.path,
-        }
-    }
-
-    pub fn crate_name(&self) -> Option<&String> {
-        match self {
-            FixtureMeta::File(f) => f.crate_name.as_ref(),
-            _ => None,
-        }
-    }
-
-    pub fn cfg_options(&self) -> Option<&CfgOptions> {
-        match self {
-            FixtureMeta::File(f) => Some(&f.cfg),
-            _ => None,
-        }
-    }
-
-    pub fn edition(&self) -> Option<&String> {
-        match self {
-            FixtureMeta::File(f) => f.edition.as_ref(),
-            _ => None,
-        }
-    }
-
-    pub fn env(&self) -> impl Iterator<Item = (&String, &String)> {
-        struct EnvIter<'a> {
-            iter: Option<std::collections::hash_map::Iter<'a, String, String>>,
-        }
-
-        impl<'a> EnvIter<'a> {
-            fn new(meta: &'a FixtureMeta) -> Self {
-                Self {
-                    iter: match meta {
-                        FixtureMeta::File(f) => Some(f.env.iter()),
-                        _ => None,
-                    },
-                }
-            }
-        }
-
-        impl<'a> Iterator for EnvIter<'a> {
-            type Item = (&'a String, &'a String);
-            fn next(&mut self) -> Option<Self::Item> {
-                self.iter.as_mut().and_then(|i| i.next())
-            }
-        }
-
-        EnvIter::new(self)
-    }
-}
-
-/// Parses text which looks like this:
-///
-///  ```not_rust
-///  //- some meta
-///  line 1
-///  line 2
-///  // - other meta
-///  ```
-pub fn parse_fixture(ra_fixture: &str) -> Vec<FixtureEntry> {
-    let fixture = indent_first_line(ra_fixture);
-    let margin = fixture_margin(&fixture);
-
-    let mut lines = fixture
-        .split('\n') // don't use `.lines` to not drop `\r\n`
-        .enumerate()
-        .filter_map(|(ix, line)| {
-            if line.len() >= margin {
-                assert!(line[..margin].trim().is_empty());
-                let line_content = &line[margin..];
-                if !line_content.starts_with("//-") {
-                    assert!(
-                        !line_content.contains("//-"),
-                        r#"Metadata line {} has invalid indentation. All metadata lines need to have the same indentation.
-The offending line: {:?}"#,
-                        ix,
-                        line
-                    );
-                }
-                Some(line_content)
-            } else {
-                assert!(line.trim().is_empty());
-                None
-            }
-        });
-
-    let mut res: Vec<FixtureEntry> = Vec::new();
-    for line in lines.by_ref() {
-        if line.starts_with("//-") {
-            let meta = line["//-".len()..].trim().to_string();
-            let meta = parse_meta(&meta);
-            res.push(FixtureEntry { meta, text: String::new() })
-        } else if let Some(entry) = res.last_mut() {
-            entry.text.push_str(line);
-            entry.text.push('\n');
-        }
-    }
-    res
-}
-
-//- /lib.rs crate:foo deps:bar,baz cfg:foo=a,bar=b env:OUTDIR=path/to,OTHER=foo
-fn parse_meta(meta: &str) -> FixtureMeta {
-    let components = meta.split_ascii_whitespace().collect::<Vec<_>>();
-
-    if components[0] == "root" {
-        let path = components[1].to_string();
-        assert!(path.starts_with("/") && path.ends_with("/"));
-        return FixtureMeta::Root { path };
-    }
-
-    let path = components[0].to_string();
-    assert!(path.starts_with("/"));
-
-    let mut krate = None;
-    let mut deps = Vec::new();
-    let mut edition = None;
-    let mut cfg = CfgOptions::default();
-    let mut env = FxHashMap::default();
-    for component in components[1..].iter() {
-        let (key, value) = split1(component, ':').unwrap();
-        match key {
-            "crate" => krate = Some(value.to_string()),
-            "deps" => deps = value.split(',').map(|it| it.to_string()).collect(),
-            "edition" => edition = Some(value.to_string()),
-            "cfg" => {
-                for key in value.split(',') {
-                    match split1(key, '=') {
-                        None => cfg.insert_atom(key.into()),
-                        Some((k, v)) => cfg.insert_key_value(k.into(), v.into()),
-                    }
-                }
-            }
-            "env" => {
-                for key in value.split(',') {
-                    if let Some((k, v)) = split1(key, '=') {
-                        env.insert(k.into(), v.into());
-                    }
-                }
-            }
-            _ => panic!("bad component: {:?}", component),
-        }
-    }
-
-    FixtureMeta::File(FileMeta { path, crate_name: krate, deps, edition, cfg, env })
-}
-
-/// Adjusts the indentation of the first line to the minimum indentation of the rest of the lines.
-/// This allows fixtures to start off in a different indentation, e.g. to align the first line with
-/// the other lines visually:
-/// ```
-/// let fixture = "//- /lib.rs
-///                mod foo;
-///                //- /foo.rs
-///                fn bar() {}
-/// ";
-/// assert_eq!(fixture_margin(fixture),
-/// "               //- /lib.rs
-///                mod foo;
-///                //- /foo.rs
-///                fn bar() {}
-/// ")
-/// ```
-fn indent_first_line(fixture: &str) -> String {
-    if fixture.is_empty() {
-        return String::new();
-    }
-    let mut lines = fixture.lines();
-    let first_line = lines.next().unwrap();
-    if first_line.contains("//-") {
-        let rest = lines.collect::<Vec<_>>().join("\n");
-        let fixed_margin = fixture_margin(&rest);
-        let fixed_indent = fixed_margin - indent_len(first_line);
-        format!("\n{}{}\n{}", " ".repeat(fixed_indent), first_line, rest)
-    } else {
-        fixture.to_owned()
-    }
-}
-
-fn fixture_margin(fixture: &str) -> usize {
-    fixture
-        .lines()
-        .filter(|it| it.trim_start().starts_with("//-"))
-        .map(indent_len)
-        .next()
-        .expect("empty fixture")
-}
-
-fn indent_len(s: &str) -> usize {
-    s.len() - s.trim_start().len()
-}
-
-#[test]
-#[should_panic]
-fn parse_fixture_checks_further_indented_metadata() {
-    parse_fixture(
-        r"
-        //- /lib.rs
-          mod bar;
-
-          fn foo() {}
-          //- /bar.rs
-          pub fn baz() {}
-          ",
-    );
-}
-
-#[test]
-fn parse_fixture_can_handle_dedented_first_line() {
-    let fixture = "//- /lib.rs
-                   mod foo;
-                   //- /foo.rs
-                   struct Bar;
-";
-    assert_eq!(
-        parse_fixture(fixture),
-        parse_fixture(
-            "//- /lib.rs
-mod foo;
-//- /foo.rs
-struct Bar;
-"
-        )
-    )
-}
-
-#[test]
-fn parse_fixture_gets_full_meta() {
-    let parsed = parse_fixture(
-        r"
-    //- /lib.rs crate:foo deps:bar,baz cfg:foo=a,bar=b,atom env:OUTDIR=path/to,OTHER=foo
-    mod m;
-    ",
-    );
-    assert_eq!(1, parsed.len());
-
-    let parsed = &parsed[0];
-    assert_eq!("mod m;\n\n", parsed.text);
-
-    let meta = &parsed.meta;
-    assert_eq!("foo", meta.crate_name().unwrap());
-    assert_eq!("/lib.rs", meta.path());
-    assert!(meta.cfg_options().is_some());
-    assert_eq!(2, meta.env().count());
-}
-
-/// Same as `parse_fixture`, except it allow empty fixture
-pub fn parse_single_fixture(ra_fixture: &str) -> Option<FixtureEntry> {
-    if !ra_fixture.lines().any(|it| it.trim_start().starts_with("//-")) {
-        return None;
-    }
-
-    let fixtures = parse_fixture(ra_fixture);
-    if fixtures.len() > 1 {
-        panic!("too many fixtures");
-    }
-    fixtures.into_iter().nth(0)
-}
-
 // Comparison functionality borrowed from cargo:
 
 /// Compare a line with an expected pattern.