stubr 0.6.2

Wiremock implemented in Rust
Documentation 
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use std::{
    env::current_dir,
    ffi::{OsStr, OsString},
    fs::OpenOptions,
    path::PathBuf,
};

use super::{super::model::JsonStub, VerifyExcept};

pub(crate) struct ProducerStubFinder;

impl ProducerStubFinder {
    pub(crate) fn find_stubs<N>(except: impl VerifyExcept<N>) -> Vec<(JsonStub, OsString)> {
        Self::stub_dir()
            .and_then(|dir| dir.read_dir().ok())
            .map(|d| d.filter_map(Result::ok).map(|dir| dir.path()))
            .map(Self::map_json_stub)
            .map(|stubs| {
                stubs
                    .filter(|(_, n)| {
                        n.to_str()
                            .map(|s| s.trim_end_matches(".json"))
                            .map(str::to_string)
                            .map(|s| !except.call(s))
                            .unwrap_or_default()
                    })
                    .collect()
            })
            .unwrap_or_default()
    }

    fn stub_dir() -> Option<PathBuf> {
        current_dir().map(|it| it.join("stubs")).ok()
    }

    fn map_json_stub(files: impl Iterator<Item = PathBuf>) -> impl Iterator<Item = (JsonStub, OsString)> {
        files
            .filter_map(|path| {
                path.file_name()
                    .map(OsStr::to_owned)
                    .zip(OpenOptions::new().read(true).open(path).ok())
            })
            .filter_map(|(name, file)| serde_json::from_reader(file).ok().zip(Some(name)))
    }
}