anchor.diff:          let b = bra.TryFind f
           let a = Array.tryFind f arr
           Assert.IsTrue((b = a))
  -    Check.Verbose <| testFun (fun e -> e % 3 = 2)        
  +    Check.VerboseThrowOnFailure <| testFun (fun e -> e % 3 = 2)        
   
   [<Test>]
   let ``Random Find``() =   
  
positive.code: let testIters = 10
  let x = 1000UL
  let testLen = 1000000
  let r = System.Random()
  
  let compareByElems (bra : BlockResizeArray<'T>) (arr : 'T []) = 
      let mutable res = true 
  
negative.code:             | :? System.Collections.Generic.KeyNotFoundException -> None
  
          Assert.IsTrue((b = a))
      Check.VerboseThrowOnFailure <| testFun (fun e -> e % 3 = 2) 
  
  [<Test>]
  let ``Random ToArray``() =   
      let testFun (bra:BlockResizeArray<int>) =        
          let arr = bra.ToArray()
          compareByElems bra arr
      Check.VerboseThrowOnFailure <| testFun