restore test

Author: swhitty

Tests/MutexTests.swift

@@ -49,18 +49,18 @@ final class MutexTests: XCTestCase {
         }
     }
 
-//    func testLockIfAvailable_ReturnsValue() {
-//        let mutex = Mutex("fish")
-//        mutex.lock.unsafeLock()
-//        XCTAssertNil(
-//            mutex.withLockIfAvailable { _ in "chips" }
-//        )
-//        mutex.lock.unsafeUnlock()
-//        XCTAssertEqual(
-//            mutex.withLockIfAvailable { _ in "chips" },
-//            "chips"
-//        )
-//    }
+    func testLockIfAvailable_ReturnsValue() {
+        let mutex = Mutex("fish")
+        mutex.lock.unsafeLock()
+        XCTAssertNil(
+            mutex.withLockIfAvailable { _ in "chips" }
+        )
+        mutex.lock.unsafeUnlock()
+        XCTAssertEqual(
+            mutex.withLockIfAvailable { _ in "chips" },
+            "chips"
+        )
+    }
 
     func testWithLockIfAvailable_ThrowsError() {
         let mutex = Mutex("fish")