fix some errors

Author: sylvestre

tests/by-util/test_df.rs

@@ -12,6 +12,7 @@
 
 use std::collections::HashSet;
 
+#[cfg(not(any(target_os = "freebsd", target_os = "windows")))]
 use uu_tests_common::at_and_ucmd;
 use uu_tests_common::new_ucmd;
 use uu_tests_common::util::TestScenario;

tests/by-util/test_du.rs

@@ -9,6 +9,7 @@ use regex::Regex;
 
 use uu_tests_common::at_and_ucmd;
 use uu_tests_common::new_ucmd;
+#[cfg(any(target_os = "linux", target_os = "android"))]
 use uu_tests_common::unwrap_or_return;
 #[cfg(not(target_os = "windows"))]
 use uu_tests_common::util::expected_result;

tests/by-util/test_mkdir.rs

@@ -11,6 +11,7 @@
 use libc::mode_t;
 #[cfg(not(windows))]
 use std::os::unix::fs::PermissionsExt;
+#[cfg(not(windows))]
 use uu_tests_common::at_and_ucmd;
 use uu_tests_common::new_ucmd;
 use uu_tests_common::util::TestScenario;

tests/by-util/test_more.rs

@@ -3,6 +3,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 use std::io::IsTerminal;
+#[cfg(target_family = "unix")]
 use uu_tests_common::at_and_ucmd;
 use uu_tests_common::new_ucmd;
 use uu_tests_common::util::TestScenario;

tests/by-util/test_tail.rs

@@ -42,8 +42,8 @@ use tail::text;
 use uu_tests_common::at_and_ucmd;
 use uu_tests_common::new_ucmd;
 use uu_tests_common::random::{AlphanumericNewline, RandomizedString};
-use uu_tests_common::unwrap_or_return;
 #[cfg(unix)]
+use uu_tests_common::unwrap_or_return;
 use uu_tests_common::util::expected_result;
 #[cfg(unix)]
 #[cfg(not(windows))]

tests/by-util/test_whoami.rs

@@ -8,7 +8,6 @@ use uu_tests_common::new_ucmd;
 use uu_tests_common::unwrap_or_return;
 #[cfg(unix)]
 use uu_tests_common::util::expected_result;
-#[cfg(unix)]
 use uu_tests_common::util::{is_ci, whoami, TestScenario};
 use uu_tests_common::util_name;