diff --git a/.gitignore b/.gitignore
index 806b4a4c..d54317d8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@ stop_solr.sh
 .idea
 .cache
 .irb_history
+.byebug_history
 ht_secure_data.rb
 logs
 overlap/overlap_umich.tsv
@@ -20,6 +21,7 @@ lib/translation_maps/umich/libLocInfo.yaml
 /umich_catalog_indexing/debug*
 /umich_catalog_indexing/.m2
 /umich_catalog_indexing/.ssh/*
+umich_catalog_indexing/coverage/
 /sftp/ssh/*
 !/sftp/ssh/README.md
 /sftp/search_daily_bibs/*.xml
@@ -31,3 +33,4 @@ lib/translation_maps/umich/libLocInfo.yaml
 !sftp/search_daily_bibs/birds_2022021017_21131448650006381_new.tar.gz
 support_dbs/scratch/*
 !support_dbs/scratch/.keep
+biblio/biblio.zip
diff --git a/umich_catalog_indexing/Gemfile b/umich_catalog_indexing/Gemfile
index d5737d13..9ba97c77 100644
--- a/umich_catalog_indexing/Gemfile
+++ b/umich_catalog_indexing/Gemfile
@@ -7,6 +7,7 @@ group :development do
   gem "rspec", "~>3.0"
   gem "webmock", "~>3.0"
   gem "standard"
+  gem "simplecov"
 end
 
 gem "yell", "~>2.0"
diff --git a/umich_catalog_indexing/Gemfile.lock b/umich_catalog_indexing/Gemfile.lock
index f67a6c2f..81b50bea 100644
--- a/umich_catalog_indexing/Gemfile.lock
+++ b/umich_catalog_indexing/Gemfile.lock
@@ -48,6 +48,7 @@ GEM
     crack (0.4.5)
       rexml
     diff-lcs (1.5.0)
+    docile (1.4.0)
     domain_name (0.6.20240107)
     dot-properties (0.1.4)
       bundler (>= 2.2.33)
@@ -177,6 +178,12 @@ GEM
       connection_pool (>= 2.3.0)
       rack (>= 2.2.4)
       redis-client (>= 0.14.0)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
     slop (4.10.1)
     standard (1.33.0)
       language_server-protocol (~> 3.17.0.2)
@@ -248,6 +255,7 @@ DEPENDENCIES
   sequel (~> 5.0)
   sftp!
   sidekiq
+  simplecov
   standard
   traject (~> 3.0, >= 3.8.2)
   traject-marc4j_reader (~> 1.0)
diff --git a/umich_catalog_indexing/lib/jobs/utilities/translation_map_fetcher.rb b/umich_catalog_indexing/lib/jobs/utilities/translation_map_fetcher.rb
index 44a17ebf..4c155c69 100644
--- a/umich_catalog_indexing/lib/jobs/utilities/translation_map_fetcher.rb
+++ b/umich_catalog_indexing/lib/jobs/utilities/translation_map_fetcher.rb
@@ -2,8 +2,17 @@
 module Jobs
   module Utilities
     class TranslationMapFetcher
-      def initialize(logger = S.logger)
-        @logger = logger
+      def initialize(
+        lib_loc_info_klass: Jobs::LibLocInfo,
+        electronic_collections_klass: Jobs::ElectronicCollections,
+        high_level_browse_klass: HighLevelBrowse,
+        translation_map_dir: "/app/lib/translation_maps"
+      )
+        @logger = S.logger
+        @lib_loc_info_klass = lib_loc_info_klass
+        @electronic_collections_klass = electronic_collections_klass
+        @high_level_browse_klass = high_level_browse_klass
+        @translation_map_dir = translation_map_dir
       end
 
       def run
@@ -19,7 +28,7 @@ def run
 
       def fetch_high_level_browse
         if should_fetch?(hlb_file)
-          HighLevelBrowse.fetch_and_save(dir: hlb_dir)
+          @high_level_browse_klass.fetch_and_save(dir: hlb_dir)
           @logger.info "updated #{hlb_file}"
         else
           @logger.info "#{hlb_file} is less than one day old. Did not update"
@@ -27,11 +36,11 @@ def fetch_high_level_browse
       end
 
       def fetch_lib_loc_info
-        fetch_translation_map(path: lib_loc_info_file, fetcher: lambda { Jobs::LibLocInfo.generate_translation_map })
+        fetch_translation_map(path: lib_loc_info_file, fetcher: lambda { @lib_loc_info_klass.generate_translation_map })
       end
 
       def fetch_electronic_collections
-        fetch_translation_map(path: electronic_collection_file, fetcher: lambda { Jobs::ElectronicCollections.generate_translation_map })
+        fetch_translation_map(path: electronic_collection_file, fetcher: lambda { @electronic_collections_klass.generate_translation_map })
       end
 
       # @param path [String] [path to where the translation map should be saved]
@@ -41,12 +50,10 @@ def fetch_translation_map(path:, fetcher:)
         if should_fetch?(path)
           temporary_path = "#{path}_#{SecureRandom.alphanumeric(8)}.temporary"
           File.write(temporary_path, fetcher.call)
-          if !File.exist?(temporary_path) || File.size?(temporary_path) < 15
-            @logger.error "Did not update #{path}. Failed to load file"
-          else
-            File.rename(temporary_path, path)
-            @logger.info "updated #{path}"
-          end
+          raise StandardError, "#{temporary_path} does not exist; Failed to load file" if !File.exist?(temporary_path)
+          raise StandardError, "#{temporary_path} is too small; Failed to load file" if File.size?(temporary_path) < 15
+          File.rename(temporary_path, path)
+          @logger.info "updated #{path}"
         else
           @logger.info "#{path} is less than one day old. Did not update"
         end
@@ -59,19 +66,19 @@ def should_fetch?(file)
       end
 
       def hlb_dir
-        "/app/lib/translation_maps"
+        @translation_map_dir
       end
 
       def hlb_file
-        "#{hlb_dir}/hlb.json.gz"
+        "#{@translation_map_dir}/hlb.json.gz"
       end
 
       def lib_loc_info_file
-        "/app/lib/translation_maps/umich/libLocInfo.yaml"
+        "#{@translation_map_dir}/umich/libLocInfo.yaml"
       end
 
       def electronic_collection_file
-        "/app/lib/translation_maps/umich/electronic_collections.yaml"
+        "#{@translation_map_dir}/umich/electronic_collections.yaml"
       end
     end
   end
diff --git a/umich_catalog_indexing/lib/services.rb b/umich_catalog_indexing/lib/services.rb
index 46424d04..0115d493 100644
--- a/umich_catalog_indexing/lib/services.rb
+++ b/umich_catalog_indexing/lib/services.rb
@@ -4,6 +4,10 @@
 Services = Canister.new
 S = Services
 
+S.register(:project_root) do
+  File.absolute_path(File.join(__dir__, ".."))
+end
+
 S.register(:log_stream) do
   $stdout.sync = true
   $stdout
diff --git a/umich_catalog_indexing/spec/jobs/alma_file_processor_spec.rb b/umich_catalog_indexing/spec/jobs/utilities/alma_file_processor_spec.rb
similarity index 83%
rename from umich_catalog_indexing/spec/jobs/alma_file_processor_spec.rb
rename to umich_catalog_indexing/spec/jobs/utilities/alma_file_processor_spec.rb
index e270595b..137039d8 100644
--- a/umich_catalog_indexing/spec/jobs/alma_file_processor_spec.rb
+++ b/umich_catalog_indexing/spec/jobs/utilities/alma_file_processor_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../spec_helper.rb'
+require_relative "../../spec_helper"
 require "jobs"
 RSpec.describe Jobs::Utilities::AlmaFileProcessor do
   before(:each) do
@@ -13,8 +13,8 @@
       @mkdir_double = double("MkidrDouble", mkdir: "")
       @run_params = {
         sftp: instance_double(SFTP::Client, get: ""),
-        tar: lambda{|path, destination| @tar_double.exec(path, destination)},
-        mkdir: lambda{|dir| @mkdir_double.mkdir(dir)}
+        tar: lambda { |path, destination| @tar_double.exec(path, destination) },
+        mkdir: lambda { |dir| @mkdir_double.mkdir(dir) }
       }
     end
     it "calls sftp get function with path and destination" do
@@ -29,7 +29,7 @@
       expect(@mkdir_double).to receive(:mkdir).with("/app/scratch")
       subject.run(**@run_params)
     end
-  end 
+  end
   context "#xml_file" do
     it "returns the appropriate filename" do
       expect(subject.xml_file).to eq("/app/scratch/file.xml")
@@ -38,11 +38,11 @@
   context "#clean" do
     before(:each) do
       @dir_delete_double = class_double(FileUtils, remove_dir: nil)
-      @delete = lambda{|file| @dir_delete_double.remove_dir(file)}
+      @delete = lambda { |file| @dir_delete_double.remove_dir(file) }
     end
     it "removes the files put in the scratch directory" do
       expect(@dir_delete_double).to receive(:remove_dir).with("/app/scratch")
-      subject.clean(@delete) 
+      subject.clean(@delete)
     end
   end
 end
diff --git a/umich_catalog_indexing/spec/jobs/utilities/translation_map_fetcher_spec.rb b/umich_catalog_indexing/spec/jobs/utilities/translation_map_fetcher_spec.rb
new file mode 100644
index 00000000..0c3fc015
--- /dev/null
+++ b/umich_catalog_indexing/spec/jobs/utilities/translation_map_fetcher_spec.rb
@@ -0,0 +1,77 @@
+require_relative "../../spec_helper"
+require "jobs"
+require "securerandom"
+
+RSpec.describe Jobs::Utilities::TranslationMapFetcher do
+  before(:each) do
+    @tmp_dir = File.join(S.project_root, "tmp")
+    @umich_dir = File.join(@tmp_dir, "umich")
+    @hlb_path = File.join(@tmp_dir, "hlb.json.gz")
+    @lib_loc_info_path = File.join(@umich_dir, "libLocInfo.yaml")
+    @electronic_collections_path = File.join(@umich_dir, "electronic_collections.yaml")
+    Dir.mkdir(@tmp_dir) unless File.exist?(@tmp_dir)
+    Dir.mkdir(@umich_dir) unless File.exist?(@umich_dir)
+    @params = {
+      lib_loc_info_klass: class_double(Jobs::LibLocInfo, generate_translation_map: string_of_size(20)),
+      electronic_collections_klass: class_double(Jobs::ElectronicCollections, generate_translation_map: string_of_size(20)),
+      high_level_browse_klass: class_double(HighLevelBrowse, fetch_and_save: nil),
+      translation_map_dir: @tmp_dir
+    }
+  end
+  after(:each) do
+    FileUtils.remove_dir(@tmp_dir, "true")
+  end
+
+  def string_of_size(size)
+    SecureRandom.random_bytes(size)
+  end
+
+  subject do
+    described_class.new(**@params)
+  end
+
+  context "#run" do
+    context "empty translation map directory" do
+      it "generates translation maps" do
+        expect(File.exist?(@lib_loc_info_path)).to eq(false)
+        expect(File.exist?(@electronic_collections_path)).to eq(false)
+        subject.run
+        expect(File.exist?(@lib_loc_info_path)).to eq(true)
+        expect(File.exist?(@electronic_collections_path)).to eq(true)
+        expect(@params[:high_level_browse_klass]).to have_received(:fetch_and_save)
+      end
+    end
+    context "has new translation map files" do
+      it "does not generate new translation maps" do
+        `touch #{@lib_loc_info_path}`
+        `touch #{@electronic_collections_path}`
+        `touch #{@hlb_path}`
+        subject.run
+        expect(@params[:high_level_browse_klass]).not_to have_received(:fetch_and_save)
+        expect(@params[:lib_loc_info_klass]).not_to have_received(:generate_translation_map)
+        expect(@params[:electronic_collections_klass]).not_to have_received(:generate_translation_map)
+      end
+    end
+    context "has old translation map files" do
+      it "generates new files" do
+        `touch -d "-2 days" #{@lib_loc_info_path} `
+        `touch -d "-2 days" #{@electronic_collections_path}`
+        `touch -d "-2 days" #{@hlb_path}`
+        subject.run
+        expect(@params[:high_level_browse_klass]).to have_received(:fetch_and_save)
+        # expect(@params[:lib_loc_info_klass]).to have_received(:generate_translation_map)
+        expect(@params[:electronic_collections_klass]).to have_received(:generate_translation_map)
+      end
+    end
+    context "fails to generate big enough files" do
+      it "errors out for too small lib_loc_info" do
+        allow(@params[:lib_loc_info_klass]).to receive(:generate_translation_map).and_return(string_of_size(2))
+        expect { subject.run }.to raise_error(StandardError)
+      end
+      it "errors out for too small electronic_collections_file" do
+        allow(@params[:electronic_collections_klass]).to receive(:generate_translation_map).and_return(string_of_size(2))
+        expect { subject.run }.to raise_error(StandardError)
+      end
+    end
+  end
+end
diff --git a/umich_catalog_indexing/spec/spec_helper.rb b/umich_catalog_indexing/spec/spec_helper.rb
index 280e3da3..37c02f43 100644
--- a/umich_catalog_indexing/spec/spec_helper.rb
+++ b/umich_catalog_indexing/spec/spec_helper.rb
@@ -1,5 +1,9 @@
 require "webmock/rspec"
 require "alma_rest_client"
+require "byebug"
+require "simplecov"
+SimpleCov.start
+ENV["APP_ENV"] = "test"
 
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
@@ -48,77 +52,75 @@
   # triggering implicit auto-inclusion in groups with matching metadata.
   config.shared_context_metadata_behavior = :apply_to_host_groups
 
-# The settings below are suggested to provide a good initial experience
-# with RSpec, but feel free to customize to your heart's content.
-=begin
-  # This allows you to limit a spec run to individual examples or groups
-  # you care about by tagging them with `:focus` metadata. When nothing
-  # is tagged with `:focus`, all examples get run. RSpec also provides
-  # aliases for `it`, `describe`, and `context` that include `:focus`
-  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
-  config.filter_run_when_matching :focus
-
-  # Allows RSpec to persist some state between runs in order to support
-  # the `--only-failures` and `--next-failure` CLI options. We recommend
-  # you configure your source control system to ignore this file.
-  config.example_status_persistence_file_path = "spec/examples.txt"
-
-  # Limits the available syntax to the non-monkey patched syntax that is
-  # recommended. For more details, see:
-  #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
-  #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
-  #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
-  config.disable_monkey_patching!
-
-  # This setting enables warnings. It's recommended, but in some cases may
-  # be too noisy due to issues in dependencies.
-  config.warnings = true
-
-  # Many RSpec users commonly either run the entire suite or an individual
-  # file, and it's useful to allow more verbose output when running an
-  # individual spec file.
-  if config.files_to_run.one?
-    # Use the documentation formatter for detailed output,
-    # unless a formatter has already been configured
-    # (e.g. via a command-line flag).
-    config.default_formatter = "doc"
-  end
-
-  # Print the 10 slowest examples and example groups at the
-  # end of the spec run, to help surface which specs are running
-  # particularly slow.
-  config.profile_examples = 10
-
-  # Run specs in random order to surface order dependencies. If you find an
-  # order dependency and want to debug it, you can fix the order by providing
-  # the seed, which is printed after each run.
-  #     --seed 1234
-  config.order = :random
-
-  # Seed global randomization in this process using the `--seed` CLI option.
-  # Setting this allows you to use `--seed` to deterministically reproduce
-  # test failures related to randomization by passing the same `--seed` value
-  # as the one that triggered the failure.
-  Kernel.srand config.seed
-=end
+  # The settings below are suggested to provide a good initial experience
+  # with RSpec, but feel free to customize to your heart's content.
+  #   # This allows you to limit a spec run to individual examples or groups
+  #   # you care about by tagging them with `:focus` metadata. When nothing
+  #   # is tagged with `:focus`, all examples get run. RSpec also provides
+  #   # aliases for `it`, `describe`, and `context` that include `:focus`
+  #   # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  #   config.filter_run_when_matching :focus
+  #
+  #   # Allows RSpec to persist some state between runs in order to support
+  #   # the `--only-failures` and `--next-failure` CLI options. We recommend
+  #   # you configure your source control system to ignore this file.
+  #   config.example_status_persistence_file_path = "spec/examples.txt"
+  #
+  #   # Limits the available syntax to the non-monkey patched syntax that is
+  #   # recommended. For more details, see:
+  #   #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
+  #   #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
+  #   #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
+  #   config.disable_monkey_patching!
+  #
+  #   # This setting enables warnings. It's recommended, but in some cases may
+  #   # be too noisy due to issues in dependencies.
+  #   config.warnings = true
+  #
+  #   # Many RSpec users commonly either run the entire suite or an individual
+  #   # file, and it's useful to allow more verbose output when running an
+  #   # individual spec file.
+  #   if config.files_to_run.one?
+  #     # Use the documentation formatter for detailed output,
+  #     # unless a formatter has already been configured
+  #     # (e.g. via a command-line flag).
+  #     config.default_formatter = "doc"
+  #   end
+  #
+  #   # Print the 10 slowest examples and example groups at the
+  #   # end of the spec run, to help surface which specs are running
+  #   # particularly slow.
+  #   config.profile_examples = 10
+  #
+  #   # Run specs in random order to surface order dependencies. If you find an
+  #   # order dependency and want to debug it, you can fix the order by providing
+  #   # the seed, which is printed after each run.
+  #   #     --seed 1234
+  #   config.order = :random
+  #
+  #   # Seed global randomization in this process using the `--seed` CLI option.
+  #   # Setting this allows you to use `--seed` to deterministically reproduce
+  #   # test failures related to randomization by passing the same `--seed` value
+  #   # as the one that triggered the failure.
+  #   Kernel.srand config.seed
 end
-#[:get, :post,:put, :delete].each do |name|
-  #define_method("stub_alma_#{name}_request") do |url:, input: nil, output: "", status: 200, query: nil|
-    #req_attributes = Hash.new
-    #req_attributes[:headers] = {   
-      #accept: 'application/json', 
-      #Authorization: "apikey #{ENV['ALMA_API_KEY']}",
-      #'Accept-Encoding'=>'gzip;q=1.0,deflate;q=0.6,identity;q=0.3',
-      #'User-Agent'=>'Ruby',
-      #'Content-Type' => 'application/json'
-    #}
-    #req_attributes[:body] = input unless input.nil?
-    #req_attributes[:query] = query unless query.nil?
-    #resp = { headers: {content_type: 'application/json'}, status: status, body: output }
+# [:get, :post,:put, :delete].each do |name|
+# define_method("stub_alma_#{name}_request") do |url:, input: nil, output: "", status: 200, query: nil|
+# req_attributes = Hash.new
+# req_attributes[:headers] = {
+# accept: 'application/json',
+# Authorization: "apikey #{ENV['ALMA_API_KEY']}",
+# 'Accept-Encoding'=>'gzip;q=1.0,deflate;q=0.6,identity;q=0.3',
+# 'User-Agent'=>'Ruby',
+# 'Content-Type' => 'application/json'
+# }
+# req_attributes[:body] = input unless input.nil?
+# req_attributes[:query] = query unless query.nil?
+# resp = { headers: {content_type: 'application/json'}, status: status, body: output }
 
-    #stub_request(name, "#{ENV["ALMA_API_HOST"]}/almaws/v1/#{url}").with( **req_attributes).to_return(**resp)   
-  #end
-#end
+# stub_request(name, "#{ENV["ALMA_API_HOST"]}/almaws/v1/#{url}").with( **req_attributes).to_return(**resp)
+# end
+# end
 def fixture(path)
   File.read("./spec/fixtures/#{path}")
 end