Make test pass all of the Busybox tests

src/test/test.rs

@@ -38,15 +38,7 @@ pub fn uumain(_: Vec<String>) -> int {
         },
         _ => args.slice(1, args.len()),
     };
-    let rv = match args.len() {
-        0 => false,
-        1 => one(args),
-        2 => two(args),
-        3 => three(args),
-        4 => four(args),
-        _ => return 2,
-    };
-    1 - rv as int
+    1 - dispatch(args) as int
 }
 
 fn one(args: &[&[u8]]) -> bool {
@@ -88,6 +80,8 @@ fn three(args: &[&[u8]]) -> bool {
         b"-ge" => integers(args[0], args[2], GreaterEqual),
         b"-lt" => integers(args[0], args[2], Less),
         b"-le" => integers(args[0], args[2], LessEqual),
+        b"-a" => one(args.slice_to(1)) && one(args.slice_from(2)),
+        b"-o" => one(args.slice_to(1)) || one(args.slice_from(2)),
         _ => match args[0] {
             b"!" => !two(args.slice_from(1)),
             _ => false,
@@ -96,9 +90,18 @@ fn three(args: &[&[u8]]) -> bool {
 }
 
 fn four(args: &[&[u8]]) -> bool {
-    match args[0] {
-        b"!" => !three(args.slice_from(1)),
-        _ => false,
+    let (val, len) = match args[0] {
+        b"!" => (!three(args.slice_from(1)), 4),
+        _ => (three(args), 3)
+    };
+    if len < args.len() {
+        match args[len] {
+            b"-a" => val && dispatch(args.slice_from(len + 1)),
+            b"-o" => val || dispatch(args.slice_from(len + 1)),
+            _ => false
+        }
+    } else {
+        val
     }
 }
 
@@ -136,6 +139,16 @@ fn isatty(fd: &[u8]) -> bool {
             .map(|i| unsafe { isatty(i) == 1 }).unwrap_or(false)
 }
 
+fn dispatch(args: &[&[u8]]) -> bool {
+    match args.len() {
+        0 => false,
+        1 => one(args),
+        2 => two(args),
+        3 => three(args),
+        _ => four(args)
+    }
+}
+
 #[deriving(Eq, PartialEq)]
 enum PathCondition {
     BlockSpecial,
@@ -242,4 +255,3 @@ fn path(path: &[u8], cond: PathCondition) -> bool {
         Executable       => false, // TODO
     }
 }
-