pathchk implemented (see #841) (#860)

* Added pathchk

tests/common/util.rs

@@ -41,6 +41,15 @@ macro_rules! assert_empty_stderr(
     );
 );
 
+#[macro_export]
+macro_rules! assert_empty_stdout(
+    ($cond:expr) => (
+        if $cond.stdout.len() > 0 {
+            panic!(format!("stdout: {}", $cond.stdout))
+        }
+    );
+);
+
 #[macro_export]
 macro_rules! assert_no_error(
     ($cond:expr) => (
@@ -51,6 +60,14 @@ macro_rules! assert_no_error(
     );
 );
 
+pub fn repeat_str(s: &str, n: u32) -> String {
+    let mut repeated = String::new();
+    for _ in 0..n {
+        repeated.push_str(s);
+    }
+    repeated
+}
+
 #[macro_export]
 macro_rules! path_concat {
     ($e:expr, ..$n:expr) => {{

tests/pathchk.rs

@@ -0,0 +1,25 @@
+#[macro_use]
+mod common;
+
+use common::util::*;
+
+static UTIL_NAME: &'static str = "pathchk";
+
+#[test]
+fn test_default_mode() {
+    // test the default mode
+    {
+        // accept some reasonable default
+        let (_, mut ucmd) = testing(UTIL_NAME);
+        let result = ucmd.args(&["abc/def"]).run();
+        assert_eq!(result.stdout, "");
+        assert!(result.success);
+    }
+    {
+        // fail on long inputs
+        let (_, mut ucmd) = testing(UTIL_NAME);
+        let result = ucmd.args(&[repeat_str("test", 20000)]).run();
+        assert_eq!(result.stdout, "");
+        assert!(!result.success);
+    }
+}