Add missing spec for fogbugz importer

Adds missing spec for fogbugz importer

spec/lib/gitlab/fogbugz_import/importer_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::FogbugzImport::Importer do
+  let(:project) { create(:project_empty_repo) }
+  let(:importer) { described_class.new(project) }
+  let(:repo) do
+    instance_double(Gitlab::FogbugzImport::Repository,
+      safe_name: 'vim',
+      path: 'vim',
+      raw_data: '')
+  end
+  let(:import_data) { { 'repo' => repo } }
+  let(:credentials) do
+    {
+      'fb_session' => {
+        'uri' => 'https://testing.fogbugz.com',
+        'token' => 'token'
+      }
+    }
+  end
+
+  let(:closed_bug) do
+    {
+      fOpen: 'false',
+      sTitle: 'Closed bug',
+      sLatestTextSummary: "",
+      dtOpened: Time.now.to_s,
+      dtLastUpdated: Time.now.to_s,
+      events: { event: [] }
+    }.with_indifferent_access
+  end
+
+  let(:opened_bug) do
+    {
+      fOpen: 'true',
+      sTitle: 'Opened bug',
+      sLatestTextSummary: "",
+      dtOpened: Time.now.to_s,
+      dtLastUpdated: Time.now.to_s,
+      events: { event: [] }
+    }.with_indifferent_access
+  end
+
+  let(:fogbugz_bugs) { [opened_bug, closed_bug] }
+
+  before do
+    project.create_import_data(data: import_data, credentials: credentials)
+    allow_any_instance_of(::Fogbugz::Interface).to receive(:command).with(:listCategories).and_return([])
+    allow_any_instance_of(Gitlab::FogbugzImport::Client).to receive(:cases).and_return(fogbugz_bugs)
+  end
+
+  it 'imports bugs' do
+    expect { importer.execute }.to change { Issue.count }.by(2)
+  end
+
+  it 'imports opened bugs' do
+    importer.execute
+
+    issue = Issue.where(project_id: project.id).find_by_title(opened_bug[:sTitle])
+
+    expect(issue.state_id).to eq(Issue.available_states[:opened])
+  end
+
+  it 'imports closed bugs' do
+    importer.execute
+
+    issue = Issue.where(project_id: project.id).find_by_title(closed_bug[:sTitle])
+
+    expect(issue.state_id).to eq(Issue.available_states[:closed])
+  end
+end