refactor and add specs for query without blocks

spec/custom_drivers_types_spec.cr

@@ -167,6 +167,13 @@ describe DB do
       db.query("query", Slice(UInt8).new(4)) { }
       db.query("query", 1, "string", FooValue.new(5)) { }
       db.query "query", [1, "string", FooValue.new(5)] { }
+
+      db.query("query").close
+      db.query("query", 1).close
+      db.query("query", 1, "string").close
+      db.query("query", Slice(UInt8).new(4)).close
+      db.query("query", 1, "string", FooValue.new(5)).close
+      db.query("query", [1, "string", FooValue.new(5)]).close
     end
 
     DB.open("bar://host") do |db|
@@ -177,6 +184,13 @@ describe DB do
       db.query("query", Slice(UInt8).new(4)) { }
       db.query("query", 1, "string", BarValue.new(5)) { }
       db.query "query", [1, "string", FooValue.new(5)] { }
+
+      db.query("query").close
+      db.query("query", 1).close
+      db.query("query", 1, "string").close
+      db.query("query", Slice(UInt8).new(4)).close
+      db.query("query", 1, "string", BarValue.new(5)).close
+      db.query("query", [1, "string", BarValue.new(5)]).close
     end
   end
 end

src/db/statement.cr

@@ -75,33 +75,11 @@ module DB
       perform_query Slice(Any).new(0)
     end
 
-    # See `QueryMethods#query`
-    def query
-      perform_query(Slice(Any).new(0)).tap do |rs|
-        begin
-          yield rs
-        ensure
-          rs.close
-        end
-      end
-    end
-
     # See `QueryMethods#query`
     def query(args : Array)
       perform_query args
     end
 
-    # See `QueryMethods#query`
-    def query(args : Array)
-      perform_query(args).tap do |rs|
-        begin
-          yield rs
-        ensure
-          rs.close
-        end
-      end
-    end
-
     # See `QueryMethods#query`
     def query(*args)
       perform_query args
@@ -109,7 +87,7 @@ module DB
 
     # See `QueryMethods#query`
     def query(*args)
-      perform_query(args).tap do |rs|
+      query(*args).tap do |rs|
         begin
           yield rs
         ensure