Revert "fixing huffman encoding for Julia and adding Test"

This reverts commit 558a57a.

Author: leios

Diff for: contents/huffman_encoding/code/julia/huffman.jl

@@ -1,5 +1,3 @@
-using Test
-
 # This is for the PriorityQueue
 using DataStructures
 
@@ -15,6 +13,8 @@ struct Branch
 end
 
 const Node = Union{Leaf, Branch}
+isbranch(branch::Branch) = true
+isbranch(other::T) where {T} = false
 
 function codebook_recurse!(leaf::Leaf, code::String,
                           dict::Dict{Char,String})
@@ -33,11 +33,7 @@ end
 # This outputs encoding Dict to be used for encoding
 function create_codebook(n::Node)
     codebook = Dict{Char,String}()
-    if isa(n, Leaf)
-        codebook[n.key]="0"
-    else
-        codebook_recurse!(n, "", codebook)
-    end
+    codebook_recurse!(n, "", codebook)
     return codebook
 end
 
@@ -89,19 +85,14 @@ function decode(huffman_tree::Node, bitstring::String)
     current = huffman_tree
     final_string = ""
     for i in bitstring
-        if isa(huffman_tree, Branch)
-            if (i == '1')
-                current = current.left
-            else
-                current = current.right
-            end
-
-            if (!isa(current, Branch))
-                final_string *= string(current.key)
-                current = huffman_tree
-            end
+        if (i == '1')
+            current = current.left
         else
-            final_string *= string(huffman_tree.key)
+            current = current.right
+        end
+        if (!isbranch(current))
+            final_string = final_string * string(current.key)
+            current = huffman_tree
         end
     end
 
@@ -116,8 +107,4 @@ function two_pass_huffman(phrase::String)
     return final_string
 end
 
-@testset "b-string tests" begin
-    @test two_pass_huffman("b") == "b"
-    @test two_pass_huffman("bbbbbbbb") == "bbbbbbbb"
-    @test two_pass_huffman("bibbity bobbity") == "bibbity bobbity"
-end
+two_pass_huffman("bibbity bobbity")