Struct JsonFileBaselineStore 

pub struct JsonFileBaselineStore { /* private fields */ }

Filesystem-backed JSON baseline store.

Keys baselines as <root>/<scope>/<name>.json. Save uses write-temp-rename to remain atomic on the same filesystem.

Example

use dev_coverage::{Baseline, BaselineStore, JsonFileBaselineStore};

let dir = tempfile::tempdir().unwrap();
let store = JsonFileBaselineStore::new(dir.path());

let b = Baseline {
    name: "my-crate".into(),
    line_pct: 85.0,
    function_pct: 90.0,
    region_pct: 80.0,
};
store.save("main", &b).unwrap();
let back = store.load("main", "my-crate").unwrap().unwrap();
assert_eq!(back, b);

Implementations

impl JsonFileBaselineStore

pub fn new(root: impl Into<PathBuf>) -> Self

Build a store rooted at path. Subdirectories per scope are created lazily on save.

pub fn path_for(&self, scope: &str, name: &str) -> PathBuf

Path that would be used to persist (scope, name).

Trait Implementations

impl BaselineStore for JsonFileBaselineStore

fn load(&self, scope: &str, name: &str) -> Result<Option<Baseline>>

Load a baseline if one exists for (scope, name).

fn save(&self, scope: &str, baseline: &Baseline) -> Result<()>

Persist a baseline atomically under the given scope.

impl Clone for JsonFileBaselineStore

fn clone(&self) -> JsonFileBaselineStore

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JsonFileBaselineStore

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

Formats the value using the given formatter.