Fix exact match logic and add a test

lib/wayback_machine_downloader.rb

@@ -87,15 +87,13 @@ class WaybackMachineDownloader
     snapshot_list_to_consider += get_raw_list_from_api(@base_url, nil)
     print "."
     unless @exact_match
-      snapshot_list_to_consider += get_raw_list_from_api(@base_url + '/*', nil)
-      print "."
-    end
       @maximum_pages.times do |page_index|
         snapshot_list = get_raw_list_from_api(@base_url + '/*', page_index)
         break if snapshot_list.empty?
         snapshot_list_to_consider += snapshot_list
         print "."
       end
+    end
     puts " found #{snapshot_list_to_consider.lines.count} snaphots to consider."
     puts
     snapshot_list_to_consider

test/test_wayback_machine_downloader.rb

@@ -39,6 +39,16 @@ class WaybackMachineDownloaderTest < Minitest::Test
     assert_equal file_expected, @wayback_machine_downloader.get_file_list_by_timestamp[-2]
   end
 
+  def test_without_exact_match
+    @wayback_machine_downloader.exact_match = false
+    assert @wayback_machine_downloader.get_file_list_curated.size > 1
+  end
+
+  def test_exact_match
+    @wayback_machine_downloader.exact_match = true
+    assert_equal 1, @wayback_machine_downloader.get_file_list_curated.size
+  end
+
   def test_file_list_only_filter_without_matches
     @wayback_machine_downloader.only_filter = 'abc123'
     assert_equal 0, @wayback_machine_downloader.get_file_list_curated.size