added spec testing exception raised

spec/lib/gitlab/bitbucket_import/client_spec.rb

@@ -48,4 +48,19 @@ describe Gitlab::BitbucketImport::Client, lib: true do
       expect(issues.count).to eq(95)
     end
   end
+
+  context 'project import' do
+    it 'calls .from_project with no errors' do
+      project = create(:empty_project)
+      project.create_or_update_import_data(credentials:
+                                             { :user => "git",
+                                               :password => nil,
+                                               :bb_session =>
+                                                 { :bitbucket_access_token => "test",
+                                                   :bitbucket_access_token_secret => "test" } })
+      project.import_url = "ssh://git@bitbucket.org/test/test.git"
+
+      expect { described_class.from_project(project) }.to_not raise_error
+    end
+  end
 end