test: test user passwd on cygwin

Author: Berrysoft

test/test_unistd.rs

@@ -1223,15 +1223,18 @@ fn test_access_file_exists() {
 }
 
 #[cfg(not(target_os = "redox"))]
-#[cfg_attr(target_os = "cygwin", ignore)]
 #[test]
 fn test_user_into_passwd() {
-    // get the UID of the "nobody" user
-    #[cfg(not(target_os = "haiku"))]
-    let test_username = "nobody";
-    // "nobody" unavailable on haiku
-    #[cfg(target_os = "haiku")]
-    let test_username = "user";
+    let test_username = if cfg!(target_os = "haiku") {
+        // "nobody" unavailable on haiku
+        "user"
+    } else if cfg!(target_os = "cygwin") {
+        // the Windows admin user
+        "Administrator"
+    } else {
+        // get the UID of the "nobody" user
+        "nobody"
+    };
 
     let nobody = User::from_name(test_username).unwrap().unwrap();
     let pwd: libc::passwd = nobody.into();