Struct FixtureDatabase 

pub struct FixtureDatabase {

    pub definitions: Arc<DashMap<String, Vec<FixtureDefinition>>>,
    pub file_definitions: Arc<DashMap<PathBuf, HashSet<String>>>,
    pub usages: Arc<DashMap<PathBuf, Vec<FixtureUsage>>>,
    pub usage_by_fixture: Arc<DashMap<String, Vec<(PathBuf, FixtureUsage)>>>,
    pub file_cache: Arc<DashMap<PathBuf, Arc<String>>>,
    pub undeclared_fixtures: Arc<DashMap<PathBuf, Vec<UndeclaredFixture>>>,
    pub imports: Arc<DashMap<PathBuf, HashSet<String>>>,
    pub canonical_path_cache: Arc<DashMap<PathBuf, PathBuf>>,
    pub line_index_cache: Arc<DashMap<PathBuf, (u64, Arc<Vec<usize>>)>>,
    pub ast_cache: Arc<DashMap<PathBuf, (u64, Arc<Mod>)>>,
    pub definitions_version: Arc<AtomicU64>,
    pub cycle_cache: Arc<DashMap<(), (u64, Arc<Vec<FixtureCycle>>)>>,
    pub available_fixtures_cache: Arc<DashMap<PathBuf, (u64, Arc<Vec<FixtureDefinition>>)>>,
}

The central database for fixture definitions and usages.

Uses DashMap for lock-free concurrent access during workspace scanning.

Fields

definitions: Arc<DashMap<String, Vec<FixtureDefinition>>>

Map from fixture name to all its definitions (can be in multiple conftest.py files).

file_definitions: Arc<DashMap<PathBuf, HashSet<String>>>

Reverse index: file path -> fixture names defined in that file. Used for efficient cleanup when a file is re-analyzed.

usages: Arc<DashMap<PathBuf, Vec<FixtureUsage>>>

Map from file path to fixtures used in that file.

usage_by_fixture: Arc<DashMap<String, Vec<(PathBuf, FixtureUsage)>>>

Reverse index: fixture name -> (file_path, usage) pairs. Used for efficient O(1) lookup in find_references_for_definition.

file_cache: Arc<DashMap<PathBuf, Arc<String>>>

Cache of file contents for analyzed files (uses Arc for efficient sharing).

undeclared_fixtures: Arc<DashMap<PathBuf, Vec<UndeclaredFixture>>>

Map from file path to undeclared fixtures used in function bodies.

imports: Arc<DashMap<PathBuf, HashSet<String>>>

Map from file path to imported names in that file.

canonical_path_cache: Arc<DashMap<PathBuf, PathBuf>>

Cache of canonical paths to avoid repeated filesystem calls.

line_index_cache: Arc<DashMap<PathBuf, (u64, Arc<Vec<usize>>)>>

Cache of line indices (byte offsets) for files to avoid recomputation. Stores (content_hash, line_index) to invalidate when content changes.

ast_cache: Arc<DashMap<PathBuf, (u64, Arc<Mod>)>>

Cache of parsed AST for files to avoid re-parsing. Stores (content_hash, ast) to invalidate when content changes.

definitions_version: Arc<AtomicU64>

Version counter for definitions, incremented on each change. Used to invalidate cycle detection cache and available fixtures cache.

cycle_cache: Arc<DashMap<(), (u64, Arc<Vec<FixtureCycle>>)>>

Cache of detected fixture cycles. Stores (definitions_version, cycles) to invalidate when definitions change.

available_fixtures_cache: Arc<DashMap<PathBuf, (u64, Arc<Vec<FixtureDefinition>>)>>

Cache of available fixtures per file. Stores (definitions_version, fixtures) to invalidate when definitions change.

Implementations

impl FixtureDatabase

pub fn analyze_file(&self, file_path: PathBuf, content: &str)

Analyze a Python file for fixtures and usages. This is the public API - it cleans up previous definitions before analyzing.

impl FixtureDatabase

pub fn print_fixtures_tree( &self, root_path: &Path, skip_unused: bool, only_unused: bool, )

Print fixtures as a tree structure

pub fn get_unused_fixtures(&self) -> Vec<(PathBuf, String)>

Get all unused fixtures (fixtures with zero usages). Returns a vector of (file_path, fixture_name) tuples sorted by path then name. Excludes third-party fixtures from site-packages.

impl FixtureDatabase

pub fn get_imported_fixtures( &self, file_path: &Path, visited: &mut HashSet<PathBuf>, ) -> HashSet<String>

Get fixtures that are re-exported from a file via imports. This handles from .module import * patterns that bring fixtures into scope.

Returns fixture names that are available in file_path via imports.

pub fn is_fixture_imported_in_file( &self, fixture_name: &str, file_path: &Path, ) -> bool

Check if a fixture is available in a file via imports. This is used in resolution to check conftest.py files that import fixtures.

impl FixtureDatabase

pub fn find_fixture_definition( &self, file_path: &Path, line: u32, character: u32, ) -> Option<FixtureDefinition>

Find fixture definition for a given position in a file

pub fn find_fixture_or_definition_at_position( &self, file_path: &Path, line: u32, character: u32, ) -> Option<FixtureDefinition>

Find fixture definition at a given position, checking both usages and definitions.

This is useful for Call Hierarchy where we want to work on both fixture definition lines and fixture usage sites.

pub fn get_definition_at_line( &self, file_path: &Path, line: usize, fixture_name: &str, ) -> Option<FixtureDefinition>

Public method to get the fixture definition at a specific line and name

pub fn find_fixture_at_position( &self, file_path: &Path, line: u32, character: u32, ) -> Option<String>

Find the fixture name at a given position (either definition or usage)

pub fn extract_word_at_position( &self, line: &str, character: usize, ) -> Option<String>

Extract the word at a given character position in a line

pub fn find_fixture_references(&self, fixture_name: &str) -> Vec<FixtureUsage>

Find all references (usages) of a fixture by name

pub fn find_references_for_definition( &self, definition: &FixtureDefinition, ) -> Vec<FixtureUsage>

Find all references that resolve to a specific fixture definition. Uses the usage_by_fixture reverse index for O(m) lookup where m = usages of this fixture, instead of O(n) iteration over all usages.

pub fn get_undeclared_fixtures( &self, file_path: &Path, ) -> Vec<UndeclaredFixture>

Get all undeclared fixture usages for a file

pub fn get_available_fixtures(&self, file_path: &Path) -> Vec<FixtureDefinition>

Get all available fixtures for a given file. Results are cached with version-based invalidation for performance. Returns Arc to avoid cloning the potentially large Vec on cache hits.

pub fn get_completion_context( &self, file_path: &Path, line: u32, character: u32, ) -> Option<CompletionContext>

Get the completion context for a given position

pub fn get_function_param_insertion_info( &self, file_path: &Path, function_line: usize, ) -> Option<ParamInsertionInfo>

Get information about where to insert a new parameter in a function signature

pub fn is_inside_function( &self, file_path: &Path, line: u32, character: u32, ) -> Option<(String, bool, Vec<String>)>

Check if a position is inside a test or fixture function (parameter or body) Returns Some((function_name, is_fixture, declared_params)) if inside a function

pub fn detect_fixture_cycles(&self) -> Arc<Vec<FixtureCycle>>

Detect circular dependencies in fixtures with caching. Results are cached and only recomputed when definitions change. Returns Arc to avoid cloning the potentially large Vec.

pub fn detect_fixture_cycles_in_file( &self, file_path: &Path, ) -> Vec<FixtureCycle>

Detect cycles for fixtures in a specific file. Returns cycles where the first fixture in the cycle is defined in the given file. Uses cached cycle detection results for efficiency.

pub fn detect_scope_mismatches_in_file( &self, file_path: &Path, ) -> Vec<ScopeMismatch>

Detect scope mismatches where a broader-scoped fixture depends on a narrower-scoped fixture. For example, a session-scoped fixture depending on a function-scoped fixture. Returns mismatches for fixtures defined in the given file.

pub fn resolve_fixture_for_file( &self, file_path: &Path, fixture_name: &str, ) -> Option<FixtureDefinition>

Resolve a fixture by name for a given file using priority rules.

Returns the best matching FixtureDefinition based on pytest’s fixture shadowing rules: same file > conftest hierarchy > third-party.

pub fn find_containing_function( &self, file_path: &Path, line: usize, ) -> Option<String>

Find the name of the function/fixture containing a given line.

Used for call hierarchy to identify callers.

impl FixtureDatabase

pub fn scan_workspace(&self, root_path: &Path)

Scan a workspace directory for test files and conftest.py files. Optionally accepts exclude patterns from configuration.

pub fn scan_workspace_with_excludes( &self, root_path: &Path, exclude_patterns: &[Pattern], )

Scan a workspace directory with custom exclude patterns.

impl FixtureDatabase

pub fn new() -> Self

Create a new empty fixture database.

pub fn cleanup_file_cache(&self, file_path: &Path)

Remove all cached data for a file. Called when a file is closed or deleted to prevent unbounded memory growth.

Trait Implementations

impl Debug for FixtureDatabase

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FixtureDatabase

fn default() -> Self

Returns the “default value” for a type.