stdlib: Add regression tests for std::list

src/test/run-pass/lib-list.rs

@@ -3,6 +3,7 @@
 import std::list::car;
 import std::list::cdr;
 import std::list::from_vec;
+import std::option;
 
 fn test_from_vec() {
   auto l = from_vec([0, 1, 2]);
@@ -11,6 +12,46 @@ fn test_from_vec() {
   assert (car(cdr(cdr(l))) == 2);
 }
 
+fn test_foldl() {
+  auto l = from_vec([0, 1, 2, 3, 4]);
+  fn add (&int a, &uint b) -> uint {
+    ret (a as uint) + b;
+  }
+  auto res = list::foldl(l, 0u, add);
+  assert (res == 10u);
+}
+
+fn test_find_success() {
+  auto l = from_vec([0, 1, 2]);
+  fn match (&int i) -> option::t[int] {
+    ret if (i == 2) {
+      option::some(i)
+    } else {
+      option::none[int]
+    };
+  }
+  auto res = list::find(l, match);
+  assert (res == option::some(2));
+}
+
+fn test_find_fail() {
+  auto l = from_vec([0, 1, 2]);
+  fn match (&int i) -> option::t[int] {
+    ret option::none[int];
+  }
+  auto res = list::find(l, match);
+  assert (res == option::none[int]);
+}
+
+fn test_length() {
+  auto l = from_vec([0, 1, 2]);
+  assert (list::length(l) == 3u);
+}
+
 fn main() {
   test_from_vec();
+  test_foldl();
+  test_find_success();
+  test_find_fail();
+  test_length();
 }