use std::path::posix::Path;
#[cfg(not(test))] use std::os::homedir;

static MUXED_NAME_STR: &'static str = "muxed";

/// Return the users current homedir as a string.
#[cfg(not(test))] fn homedir_string() -> String {
    match homedir() {
        Some(dir) => format!("{}", dir.display()), 
        None      => fail!("Impossible to get your home dir!")
    }
}

#[cfg(test)] fn homedir_string() -> String {
  String::from_str("/tmp")
}

pub fn path() -> Path {
    Path::new(format!("{}/.{}/", homedir_string(), &MUXED_NAME_STR.to_string()))
}

#[test]
pub fn path_returns_muxed_inside_homedir() {
    let path = format!("{}", path().display());
    let new = format!("{}", Path::new("/tmp/.muxed").display());
    assert_eq!(path, new)
}

use std::path::posix::Path;
use std::os::homedir;

static MUXED_NAME_STR: &'static str = "muxed";

/// Return the users current homedir as a string.
fn homedir_string() -> String {
    let home_unwrap = homedir().unwrap();
    format!("{}", home_unwrap.display())
}

pub fn path() -> Path {
    Path::new(format!("{}/.{}/", homedir_string(), &MUXED_NAME_STR.to_string()))
}

--- 
+++ 
@@ -1,14 +1,27 @@
 use std::path::posix::Path;
-use std::os::homedir;
+#[cfg(not(test))] use std::os::homedir;
 
 static MUXED_NAME_STR: &'static str = "muxed";
 
 /// Return the users current homedir as a string.
-fn homedir_string() -> String {
-    let home_unwrap = homedir().unwrap();
-    format!("{}", home_unwrap.display())
+#[cfg(not(test))] fn homedir_string() -> String {
+    match homedir() {
+        Some(dir) => format!("{}", dir.display()), 
+        None      => fail!("Impossible to get your home dir!")
+    }
+}
+
+#[cfg(test)] fn homedir_string() -> String {
+  String::from_str("/tmp")
 }
 
 pub fn path() -> Path {
     Path::new(format!("{}/.{}/", homedir_string(), &MUXED_NAME_STR.to_string()))
 }
+
+#[test]
+pub fn path_returns_muxed_inside_homedir() {
+    let path = format!("{}", path().display());
+    let new = format!("{}", Path::new("/tmp/.muxed").display());
+    assert_eq!(path, new)
+}
Test the expected Path for muxed root.
