Add a test for trait initialization.

Author: DarkDimius

tests/run/traits-initialization.scala

@@ -0,0 +1,25 @@
+trait A {
+ var str = ""
+ str = "a"
+ val s = str += 'A'
+ str += '1'
+}
+
+trait B extends A {
+ str += 'b'
+ override val s = str += 'B'
+ str += '2'
+}
+
+class D extends A {
+ str += 'd'
+ override val s = str += 'D'
+ str += '3'
+}
+
+object Test extends D with B {
+ // should only have 2 fields
+ str += 'E'
+ def main(args: Array[String]) = assert(str == "aA1dD3bB2E4")
+ str += '4'
+}