chown: Add tests

tests/test_chown.rs

@@ -0,0 +1,46 @@
+use common::util::*;
+
+extern crate uu_chown;
+pub use self::uu_chown::*;
+
+static UTIL_NAME: &'static str = "chown";
+
+#[cfg(test)]
+mod test_passwd {
+    use super::passwd::*;
+
+    #[test]
+    fn test_getuid() {
+        assert_eq!(0, getuid("root").unwrap());
+        assert_eq!(99, getuid("99").unwrap());
+        assert!(getuid("88888888").is_err());
+        assert!(getuid("agroupthatdoesntexist").is_err());
+    }
+
+    #[test]
+    fn test_getgid() {
+        assert_eq!(0, getgid("root").unwrap());
+        assert_eq!(99, getgid("99").unwrap());
+        assert!(getgid("88888888").is_err());
+        assert!(getgid("agroupthatdoesntexist").is_err());
+    }
+
+    #[test]
+    fn test_uid2usr() {
+        assert_eq!("root", uid2usr(0).unwrap());
+        assert!(uid2usr(88888888).is_err());
+    }
+
+    #[test]
+    fn test_gid2grp() {
+        assert_eq!("root", gid2grp(0).unwrap());
+        assert!(gid2grp(88888888).is_err());
+    }
+}
+
+#[test]
+fn test_invalid_option() {
+    let (_, mut ucmd) = testing(UTIL_NAME);
+    ucmd.arg("-w").arg("-q").arg("/");
+    ucmd.fails();
+}

tests/tests.rs

@@ -26,6 +26,7 @@ macro_rules! unix_only {
 }
 unix_only! {
     "chmod", test_chmod;
+    "chown", test_chown;
     "mv", test_mv;
     "pathchk", test_pathchk;
     "stdbuf", test_stdbuf;