Add spec for Export::ExportCollections and Import::ImportCollections

lib/import/import_collections.rb

@@ -7,7 +7,7 @@ module Import
       @import_id = import_id
       @current_user_id = current_user_id
 
-      @zip_file_path = File.join('tmp', 'import', '#{import_id}.zip')
+      @zip_file_path = File.join('tmp', 'import', "#{import_id}.zip")
       @directory = File.join('tmp', 'import', import_id)
 
       @data = nil

spec/lib/export/export_collections.rb

+# frozen_string_literal: true
+require 'rails_helper'
+
+# test for ExportJson ImportJson
+RSpec.describe 'ExportImportCollection' do
+  let(:user) {
+    create(:person, first_name: 'Ulf', last_name: 'User', name_abbreviation: 'UU')
+  }
+  let(:collection) {
+    create(:collection, user_id: user.id, label: 'Awesome Collection')
+  }
+  let(:molfile){
+    IO.read(Rails.root.join("spec", "fixtures", "test_2.mol"))
+  }
+  let(:svg) {
+    IO.read(Rails.root.join("spec", "fixtures", "images", "molecule.svg"))
+  }
+  let(:sample) {
+    build(
+      :sample, created_by: user.id, name: 'Sample zero', molfile: molfile,
+      collections: [collection]
+    )
+  }
+  let(:molecule_name_name) { 'Awesome Molecule' }
+  let(:molecule_name) {
+    build(
+      :molecule_name, user_id: user.id, name: molecule_name_name, molecule_id: sample.molecule_id
+    )
+  }
+  let(:job_id) {
+    SecureRandom.uuid
+  }
+  before do
+    user.save!
+    collection.save!
+    sample.save!
+    molecule_name.save!
+    sample.update!(molecule_name_id: molecule_name.id)
+  end
+
+  context 'creates an export file, ' do
+    before do
+      export = Export::ExportCollections.new(job_id, [collection.id], 'zip', true)
+      export.prepare_data
+      export.to_file
+    end
+
+    it 'which exists' do
+      file_path = File.join('public', 'zip', "#{job_id}.zip")
+      expect(File.exist?(file_path)).to be true
+    end
+
+    it 'which is a zip file containing export.json, schema.json and description.txt' do
+      file_names = []
+      file_path = File.join('public', 'zip', "#{job_id}.zip")
+      Zip::File.open(file_path) do |files|
+        files.each do |file|
+          file_names << file.name
+        end
+      end
+      expect(file_names).to include('export.json', 'schema.json', 'description.txt')
+    end
+  end
+end

spec/lib/import/import_collections.rb

+# frozen_string_literal: true
+require 'rails_helper'
+
+# test for ExportJson ImportJson
+RSpec.describe 'ExportImportCollection' do
+  let(:user) {
+    create(:person, first_name: 'Ulf', last_name: 'User', name_abbreviation: 'UU')
+  }
+  before do
+    user.save!
+  end
+
+  context 'imports from a file' do
+    before do
+      # create the `tmp/imports/` if it does not exist yet
+      import_path = File.join('tmp', 'import')
+      FileUtils.mkdir_p(import_path) unless Dir.exist?(import_path)
+
+      # store the file as `tmp/imports/<import_id>.zip`
+      import_id = '2541a423-11d9-4c76-a7e1-0da470644012'
+      import_file_path = File.join('spec', 'fixtures', 'import', "#{import_id}.zip")
+      zip_file_path = File.join('tmp', 'import', "#{import_id}.zip")
+      File.open(zip_file_path, 'wb') do |file|
+        file.write(File.open(import_file_path).read)
+      end
+
+      import = Import::ImportCollections.new(import_id, user.id)
+      import.extract
+      import.read
+      import.import
+      import.cleanup
+    end
+
+    it 'creates a collection' do
+      collection = Collection.find_by(label: 'Awesome Collection')
+      expect(collection).to be_present
+    end
+  end
+end