Merge pull request #16904 from djberg96/multicast_logger

Add << method to MulticastLogger
(cherry picked from commit e121e27)

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1540356

lib/vmdb/loggers/multicast_logger.rb

@@ -24,6 +24,12 @@ def add(*args, &block)
       true
     end
 
+    def <<(msg)
+      msg = msg.strip
+      loggers.each { |l| l.send(:<<, msg) }
+      msg.size
+    end
+
     def reopen(_logdev = nil)
       raise NotImplementedError, "#{self.class.name} should not be reopened since it is backed by multiple loggers."
     end

spec/lib/vmdb/loggers/multicast_logger_spec.rb

@@ -26,4 +26,18 @@
     subject.level = 3
     [logger1, logger2, subject].each { |l| expect(l.level).to eq(3) }
   end
+
+  context "#<<" do
+    it "forwards to the other loggers" do
+      expect(logger1).to receive(:<<).with("test message")
+      expect(logger2).to receive(:<<).with("test message")
+
+      subject << "test message"
+    end
+
+    it "returns the size of the logged message" do
+      expect(subject << "test message").to eql(12)
+      expect(subject << "test message   ").to eql(12)
+    end
+  end
 end