lib/serverspec/matchers/be_installed.rb in serverspec-0.4.0 vs lib/serverspec/matchers/be_installed.rb in serverspec-0.4.1

@@ -1,16 +1,20 @@
 RSpec::Matchers.define :be_installed do
   match do |name|
-    if @provider.nil?
-      backend.check_installed(example, name)
+    if name.respond_to?(:installed?)
+      name.installed?(@provider, @version)
     else
-      check_method = "check_installed_by_#{@provider}".to_sym
+      if @provider.nil?
+        backend.check_installed(example, name)
+      else
+        check_method = "check_installed_by_#{@provider}".to_sym
 
-      unless backend.respond_to?(check_method)
-        raise ArgumentError.new("`be_installed` matcher doesn't support #{@under}")
-      end
+        unless backend.respond_to?(check_method)
+          raise ArgumentError.new("`be_installed` matcher doesn't support #{@under}")
+        end
 
-      backend.send(check_method, example, name, @version)
+        backend.send(check_method, example, name, @version)
+      end
     end
   end
 
   chain :by do |provider|
     @provider = provider