fix some tests for Android

Author: ndusart

test/sys/test_pthread.rs

@@ -3,5 +3,5 @@ use nix::sys::pthread::*;
 #[test]
 fn test_pthread_self() {
     let tid = pthread_self();
-    assert!(tid > 0);
+    assert!(tid != 0);
 }

test/test_net.rs

@@ -1,9 +1,9 @@
 use nix::net::if_::*;
 
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "android", target_os = "linux"))]
 const LOOPBACK: &'static [u8] = b"lo";
 
-#[cfg(not(target_os = "linux"))]
+#[cfg(not(any(target_os = "android", target_os = "linux")))]
 const LOOPBACK: &'static [u8] = b"lo0";
 
 #[test]

test/test_unistd.rs

@@ -64,7 +64,12 @@ fn test_wait() {
 
 #[test]
 fn test_mkstemp() {
-    let result = mkstemp("/tmp/nix_tempfile.XXXXXX");
+    #[cfg(target_os = "android")]
+    let tmp = "/data/local/tmp/";
+    #[cfg(not(target_os = "android"))]
+    let tmp = "/tmp/";
+
+    let result = mkstemp((tmp.to_owned() + "nix_tempfile.XXXXXX").as_str());
     match result {
         Ok((fd, path)) => {
             close(fd).unwrap();
@@ -73,7 +78,7 @@ fn test_mkstemp() {
         Err(e) => panic!("mkstemp failed: {}", e)
     }
 
-    let result = mkstemp("/tmp/");
+    let result = mkstemp(tmp);
     match result {
         Ok(_) => {
             panic!("mkstemp succeeded even though it should fail (provided a directory)");