Added integration test for AdSense to verify that a report with duplicate query string params is downloaded correctly.

spec/integration_tests/adsense_spec.rb

@@ -0,0 +1,28 @@
+require 'spec_helper'
+require 'google/apis/adsense_v1_4'
+require 'googleauth'
+
+Adsense = Google::Apis::AdsenseV1_4
+
+RSpec.describe Google::Apis::AdsenseV1_4, :if => run_integration_tests? do
+
+  before(:context) do
+    WebMock.allow_net_connect!
+    @adsense = Adsense::AdSenseService.new
+    @adsense.authorization = Google::Auth.get_application_default([Adsense::AUTH_ADSENSE])
+    @adsense.authorization.sub = ENV['GOOGLE_SERVICE_ACCOUNT_IMPERSONATE_EMAIL']
+    @adsense.authorization.fetch_access_token!
+  end
+
+  it 'should download a report with multiple dimensions' do
+    report = @adsense.generate_report( Date.today.to_s, Date.today.to_s, dimension: ["DATE", "AD_UNIT_NAME"] )
+    
+    report_header_names = report.headers.map { |h| h.name }
+    expect(report_header_names).to include('DATE')
+    expect(report_header_names).to include('AD_UNIT_NAME')
+  end
+  
+  after(:context) do
+    WebMock.disable_net_connect!
+  end
+end