Add two tests for sending unique boxes across channels

Issue #409

Author: brson

src/test/run-pass/unique-send-2.rs

@@ -0,0 +1,27 @@
+use std;
+import std::comm;
+import std::task;
+import std::uint;
+
+fn child(c: comm::chan<~uint>, i: uint) {
+    comm::send(c, ~i);
+}
+
+fn main() {
+    let p = comm::port();
+    let n = 100u;
+    let expected = 0u;
+    for each i in uint::range(0u, n) {
+        let f = bind child(comm::chan(p), i);
+        task::spawn(f);
+        expected += i;
+    }
+
+    let actual = 0u;
+    for each i in uint::range(0u, n) {
+        let j = comm::recv(p);
+        actual += *j;
+    }
+
+    assert expected == actual;
+}

src/test/run-pass/unique-send.rs

@@ -0,0 +1,11 @@
+use std;
+import std::comm;
+import std::task;
+
+fn main() {
+    let p = comm::port();
+    let c = comm::chan(p);
+    comm::send(c, ~100);
+    let v = comm::recv(p);
+    assert v == ~100;
+}