Merge pull request #420 from skv-headless/move_util

move utility

test/fixtures/mv/hello_world.txt

@@ -0,0 +1 @@
+Hello, World!

test/mv.rs

@@ -0,0 +1,24 @@
+use std::io::process::Command;
+use std::io::fs::{PathExtensions};
+
+static EXE: &'static str = "./mv";
+static TEST_HELLO_WORLD_SOURCE: &'static str = "hello_world.txt";
+static TEST_HELLO_WORLD_DEST: &'static str = "move_of_hello_world.txt";
+
+#[test]
+fn test_mv() {
+    let prog = Command::new(EXE)
+                            .arg(TEST_HELLO_WORLD_SOURCE)
+                            .arg(TEST_HELLO_WORLD_DEST)
+                            .status();
+
+    let exit_success = prog.unwrap().success();
+    assert_eq!(exit_success, true);
+
+    let dest = Path::new(TEST_HELLO_WORLD_DEST);
+    assert!(dest.exists() == true);
+
+    let source = Path::new(TEST_HELLO_WORLD_SOURCE);
+    assert!(source.exists() == false);
+}
+