3 files changed, 67 insertions, 0 deletions
diff --git a/test/common/mod.rs b/test/common/mod.rs
index 8a79d6a8..cdc32582 100644
--- a/test/common/mod.rs
+++ b/test/common/mod.rs
@@ -31,6 +31,20 @@ cfg_if! {
     }
 }
 
+/// Skip the test if we don't have the ability to mount file systems.
+#[cfg(target_os = "freebsd")]
+#[macro_export] macro_rules! require_mount {
+    ($name:expr) => {
+        use ::sysctl::CtlValue;
+        use nix::unistd::Uid;
+
+        if !Uid::current().is_root() && CtlValue::Int(0) == ::sysctl::value("vfs.usermount").unwrap()
+        {
+            skip!("{} requires the ability to mount file systems. Skipping test.", $name);
+        }
+    }
+}
+
 #[cfg(any(target_os = "linux", target_os= "android"))]
 #[macro_export] macro_rules! skip_if_cirrus {
     ($reason:expr) => {
diff --git a/test/test.rs b/test/test.rs
index 5a5330b7..94f8e220 100644
--- a/test/test.rs
+++ b/test/test.rs
@@ -13,6 +13,8 @@ mod test_fcntl;
 #[cfg(any(target_os = "android",
           target_os = "linux"))]
 mod test_kmod;
+#[cfg(target_os = "freebsd")]
+mod test_nmount;
 #[cfg(any(target_os = "dragonfly",
           target_os = "freebsd",
           target_os = "fushsia",
diff --git a/test/test_nmount.rs b/test/test_nmount.rs
new file mode 100644
index 00000000..92f459d6
--- /dev/null
+++ b/test/test_nmount.rs
@@ -0,0 +1,51 @@
+use crate::*;
+use nix::{
+    errno::Errno,
+    mount::{MntFlags, Nmount, unmount}
+};
+use std::{
+    ffi::CString,
+    fs::File,
+    path::Path
+};
+use tempfile::tempdir;
+
+#[test]
+fn ok() {
+    require_mount!("nullfs");
+
+    let mountpoint = tempdir().unwrap();
+    let target = tempdir().unwrap();
+    let _sentry = File::create(target.path().join("sentry")).unwrap();
+
+    let fstype = CString::new("fstype").unwrap();
+    let nullfs = CString::new("nullfs").unwrap();
+    Nmount::new()
+        .str_opt(&fstype, &nullfs)
+        .str_opt_owned("fspath", mountpoint.path().to_str().unwrap())
+        .str_opt_owned("target", target.path().to_str().unwrap())
+        .nmount(MntFlags::empty()).unwrap();
+    
+    // Now check that the sentry is visible through the mountpoint
+    let exists = Path::exists(&mountpoint.path().join("sentry"));
+
+    // Cleanup the mountpoint before asserting
+    unmount(mountpoint.path(), MntFlags::empty()).unwrap();
+    
+    assert!(exists);
+}
+
+#[test]
+fn bad_fstype() {
+    let mountpoint = tempdir().unwrap();
+    let target = tempdir().unwrap();
+    let _sentry = File::create(target.path().join("sentry")).unwrap();
+
+    let e = Nmount::new()
+        .str_opt_owned("fspath", mountpoint.path().to_str().unwrap())
+        .str_opt_owned("target", target.path().to_str().unwrap())
+        .nmount(MntFlags::empty()).unwrap_err();
+    
+    assert_eq!(e.errno(), Errno::EINVAL);
+    assert_eq!(e.errmsg(), Some("Invalid fstype"));
+}