My attempt

bin/analyze.rb

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+#!/usr/bin/env ruby
+
+require_relative '../lib/shakespeare_analyzer'
+require_relative '../lib/downloader'
+
+downloader = Downloader.new file: "http://www.ibiblio.org/xml/examples/shakespeare/macbeth.xml"
+shakes = ShakespeareAnalyzer.new xml_provider: downloader
+shakes.print_lines

lib/downloader.rb

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+require 'open-uri'
+
+class Downloader
+
+  def initialize options = {}
+    @file_to_download = options.fetch :file
+  end
+
+  def get_xml
+    complete_file = ""
+    open(@file_to_download) do |f|
+      f.each_line { |line| complete_file << line.rstrip }
+    end
+    complete_file
+  end
+
+end

lib/shakespeare_analyzer.rb

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+require 'rexml/document'
+
+class ShakespeareAnalyzer
+
+  def initialize options = {}
+    @xml_provider = options[:xml_provider]
+    @file = REXML::Document.new xml
+  end
+
+  def print_lines
+    in_descending_order(read_lines).each do |key, value|
+      puts "#{key}: #{value} lines"
+    end
+  end
+
+  private
+
+  def xml
+    @xml_provider.get_xml
+  end
+
+  def read_lines 
+    characters = Hash.new 0
+    @file.elements.each("/PLAY//LINE") do |line|
+      characters[current_speaker(line)] += 1
+    end
+    characters
+  end
+
+  def current_speaker line
+    line.parent.elements[1].text
+  end
+
+  def in_descending_order characters
+    characters.sort_by { |key, value| -value }
+  end
+
+end

spec/downloader_spec.rb

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+require 'downloader'
+
+describe Downloader do
+
+  it "returns data from a file or url" do
+    downloader = Downloader.new(file: "./spec/test.xml")
+    test_file = downloader.get_xml
+    expect(test_file).to include "Macbeth"
+  end
+
+end

spec/shakespeare_analyzer_spec.rb

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+require 'ostruct'
+require 'shakespeare_analyzer'
+
+describe ShakespeareAnalyzer do
+
+  testfile = OpenStruct.new get_xml: %Q|
+  <PLAY>
+    <ACT>
+      <SCENE>
+        <SPEECH>
+          <SPEAKER>Benjamin Sisko</SPEAKER>
+          <LINE>Don't you understand? They're REAL!</LINE>
+          <LINE>I CREATED THEM!</LINE>
+          <LINE>You cannot destroy an IDEA!</LINE>
+        </SPEECH>
+      </SCENE>
+    </ACT>
+  </PLAY>|
+
+  it "can use a xml retriever object to retrieve a file" do
+    double_xmler = double("double xmler")
+    expect(double_xmler).to receive(:get_xml)
+    test_analyzer = ShakespeareAnalyzer.new xml_provider: double_xmler
+  end
+
+  it "prints the results" do
+    test_analyzer = ShakespeareAnalyzer.new xml_provider: testfile
+    expect(STDOUT).to receive(:puts).with("Benjamin Sisko: 3 lines")
+    test_analyzer.print_lines
+  end
+end