test: Add a max/min classes test case

Author: pcwalton

src/test/run-pass/max-min-classes.rs

@@ -0,0 +1,30 @@
+trait Product {
+    fn product() -> int;
+}
+
+struct Foo {
+    x: int;
+    y: int;
+}
+
+impl Foo {
+    fn sum() -> int {
+        self.x + self.y
+    }
+}
+
+impl Foo : Product {
+    fn product() -> int {
+        self.x * self.y
+    }
+}
+
+fn Foo(x: int, y: int) -> Foo {
+    Foo { x: x, y: y }
+}
+
+fn main() {
+    let foo = Foo(3, 20);
+    io::println(#fmt("%d %d", foo.sum(), foo.product()));
+}
+