Test for issue 2904, which got fixed somewhere along the line

src/test/run-pass/issue-2904.rs

@@ -0,0 +1,78 @@
+/// Map representation
+
+use std;
+
+import io::reader_util;
+
+enum square {
+    bot,
+    wall,
+    rock,
+    lambda,
+    closed_lift,
+    open_lift,
+    earth,
+    empty
+}
+
+impl of to_str::to_str for square {
+    fn to_str() -> ~str {
+        alt self {
+          bot { ~"R" }
+          wall { ~"#" }
+          rock { ~"*" }
+          lambda { ~"\\" }
+          closed_lift { ~"L" }
+          open_lift { ~"O" }
+          earth { ~"." }
+          empty { ~" " } 
+        }
+    }
+}
+
+fn square_from_char(c: char) -> square {
+    alt c  {
+      'R'  { bot }
+      '#'  { wall }
+      '*'  { rock }
+      '\\' { lambda }
+      'L'  { closed_lift }
+      'O'  { open_lift }
+      '.'  { earth }
+      ' '  { empty }
+      _ {
+        #error("invalid square: %?", c);
+        fail
+      }
+    }
+}
+
+fn read_board_grid<rdr: owned io::reader>(+in: rdr) -> ~[~[square]] {
+    let in = in as io::reader;
+    let mut grid = ~[];
+    for in.each_line |line| {
+        let mut row = ~[];
+        for line.each_char |c| {
+            vec::push(row, square_from_char(c))
+        }
+        vec::push(grid, row)
+    }
+    let width = grid[0].len();
+    for grid.each |row| { assert row.len() == width }
+    grid
+}
+
+mod test {
+    #[test]
+    fn trivial_to_str() {
+        assert lambda.to_str() == "\\"
+    }
+
+    #[test]
+    fn read_simple_board() {
+        let s = #include_str("./maps/contest1.map");
+        read_board_grid(io::str_reader(s));
+    }
+}
+
+fn main() {}