Fixed contains function, wrote a test.

Author: avahe-kellenberger

src/safeset.nim

@@ -10,7 +10,7 @@ type
     pendingClear: bool
 
 proc newSafeSet*[T](): SafeSet[T] =
-  SafeSet[T]()
+  SafeSet[T](elements: initOrderedSet[T]())
 
 proc areElementsLocked*[T](this: SafeSet[T]): bool =
   this.iterationDepth > 0

tests/safeset_test.nim

@@ -1,7 +1,22 @@
 import
   nimtest,
   safeset,
-  sequtils
+  sequtils,
+  hashes,
+  sets
+
+var i: int = 0
+
+type Foo = object
+  id: int
+  children: SafeSet[Foo]
+
+proc newFoo(): Foo =
+  result = Foo(id: i, children: newSafeSet[Foo]())
+  inc i
+
+proc hash*(f: Foo): Hash =
+  hash(f.id)
 
 describe "SafeSet":
 
@@ -79,3 +94,15 @@ describe "SafeSet":
         @["foobar", "aoeu", "something", "htns"]
       )
 
+  describe "contains":
+
+    it "reports when a safeset contains an element properly":
+      let
+        parent = newFoo()
+        child = newFoo()
+
+      assertEquals(parent.children.contains(child), false)
+
+      parent.children.add(child)
+      assertEquals(parent.children.contains(child), true)
+