Move /src/test to /tests

tests/ui/env-args-reverse-iterator.rs

@@ -0,0 +1,38 @@
+// run-pass
+// ignore-emscripten no processes
+// ignore-sgx no processes
+
+use std::env::args;
+use std::process::Command;
+
+fn assert_reverse_iterator_for_program_arguments(program_name: &str) {
+    let args: Vec<_> = args().rev().collect();
+
+    assert!(args.len() == 4);
+    assert_eq!(args[0], "c");
+    assert_eq!(args[1], "b");
+    assert_eq!(args[2], "a");
+    assert_eq!(args[3], program_name);
+
+    println!("passed");
+}
+
+fn main() {
+    let mut args = args();
+    let me = args.next().unwrap();
+
+    if let Some(_) = args.next() {
+        assert_reverse_iterator_for_program_arguments(&me);
+        return
+    }
+
+    let output = Command::new(&me)
+        .arg("a")
+        .arg("b")
+        .arg("c")
+        .output()
+        .unwrap();
+    assert!(output.status.success());
+    assert!(output.stderr.is_empty());
+    assert_eq!(output.stdout, b"passed\n");
+}