Merge branch 'test/http-adapter' into 'master'

test: minor: add http adapter test

See merge request !16

test/unit/adapters/http_test.rb

+require 'test_helper'
+require 'http'
+require 'nickserver/adapters/http'
+
+class HttpAdapterTest < Minitest::Test
+
+  def test_normal_raise
+    stub_http_to_raise do
+      assert_raises HTTP::ConnectionError do
+        adapter.get ''
+      end
+    end
+  end
+
+  def test_rescueing
+    stub_http_to_raise do
+      assert_nil adapter.get('', rescue: 'some reason')
+    end
+  end
+
+  def test_raise_not_rescued
+    stub_http_to_raise do
+      assert_raises Http::ConnectionError do
+        assert adapter.get('', rescue: 'some other reason')
+      end
+    end
+  end
+
+  protected
+
+  def stub_http_to_raise(&block)
+    raises_exception = -> (*_args) {
+      raise HTTP::ConnectionError, 'for some reason'
+    }
+    HTTP.stub :get, raises_exception, &block
+  end
+
+  def adapter
+    Nickserver::Adapters::Http.new
+  end
+end