test: integration tests for mssql driver

JIRA: GRIF-15

spec/integration/drivers/mssql_client_test.rb

@@ -0,0 +1,70 @@
+require 'spec_helper'
+require 'gooddata/cloud_resources/mssql/mssql_client'
+require 'rspec'
+
+describe GoodData::CloudResources::MSSQLClient do
+  before do
+    @mssql_host = ENV['MSSQL_HOST'] || 'localhost'
+    @mssql_port = ENV['MSSQL_PORT'] || 1433
+    @mssql_database = ENV['MSSQL_DB'] || 'master'
+    @mssql_user = ENV['MSSQL_USER'] || 'sa'
+    @mssql_password = ENV['MSSQL_PASSWORD'] || 'Password123'
+  end
+
+  let(:valid_options) do
+    {
+      'mssql_client' => {
+        'connection' => {
+          'database' => @mssql_database,
+          'schema' => 'dbo',
+          'authentication' => {
+            'basic' => {
+              'userName' => @mssql_user,
+              'password' => @mssql_password
+            }
+          },
+          'sslMode' => 'prefer',
+          'url' => "jdbc:sqlserver://#{@mssql_host}:#{@mssql_port}"
+        }
+      }
+    }
+  end
+
+  describe '.accept?' do
+    it 'returns true for mssql type' do
+      expect(GoodData::CloudResources::MSSQLClient.accept?('mssql')).to be true
+    end
+
+    it 'returns false for other types' do
+      expect(GoodData::CloudResources::MSSQLClient.accept?('mysql')). to be false
+    end
+  end
+
+  describe '#build_connection_string' do
+    it 'builds a valid connection string' do
+      client = GoodData::CloudResources::MSSQLClient.new(valid_options)
+      connection_string = client.send(:build_connection_string)
+      expect(connection_string).to eq("jdbc:sqlserver://#{@mssql_host}:#{@mssql_port};database=#{@mssql_database};"\
+                                      "encrypt=false;trustServerCertificate=false;loginTimeout=30;")
+    end
+  end
+
+  describe '#initialize' do
+    it 'raises an error if mssql_client is missing' do
+      expect { GoodData::CloudResources::MSSQLClient.new({}) }.to raise_error(RuntimeError, "Data Source needs a client to MSSQL to be able to query the storage but 'mssql_client' is empty.")
+    end
+
+    it 'initializes with valid options' do
+      client = GoodData::CloudResources::MSSQLClient.new(valid_options)
+      expect(client).to be_an_instance_of(GoodData::CloudResources::MSSQLClient)
+    end
+
+    it 'connects to SQL Server and selects the version' do
+      client = GoodData::CloudResources::MSSQLClient.new(valid_options)
+      version_csv = client.realize_query('SELECT @@VERSION', nil)
+      expect(File).to exist(version_csv)
+      expect(File.read(version_csv)).to include('Microsoft SQL Server')
+      File.delete(version_csv)
+    end
+  end
+end