feat: lock environment-related tests

Author: codinaut

Cargo.toml

@@ -7,7 +7,13 @@ license = "MIT"
 name = "envtestkit"
 version = "1.0.0"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[features]
+default = ["lock"]
+lock = ["lazy_static", "parking_lot"]
+
+[dependencies]
+lazy_static = { version = "1.4.0", optional = true }
+parking_lot = { version = "0.11.0", optional = true }
 
 [dev-dependencies]
 fake = "2.2.3"

src/lib.rs

@@ -1,4 +1,9 @@
-mod testkit;
+#[cfg(feature = "lock")]
+#[macro_use]
+extern crate lazy_static;
+
+#[cfg(feature = "lock")]
+pub mod lock;
 
-pub use testkit::set_env;
-pub use testkit::EnvironmentTestGuard;
+mod testkit;
+pub use testkit::*;

src/lock.rs

@@ -0,0 +1,15 @@
+use parking_lot::lock_api::{RwLockReadGuard, RwLockWriteGuard};
+use parking_lot::RawRwLock;
+use parking_lot::RwLock;
+
+lazy_static! {
+    static ref LOCK: RwLock<()> = RwLock::new(());
+}
+
+pub fn lock_read<'a>() -> RwLockReadGuard<'a, RawRwLock, ()> {
+    LOCK.read()
+}
+
+pub fn lock_test<'a>() -> RwLockWriteGuard<'a, RawRwLock, ()> {
+    LOCK.write()
+}