Add convenience wrapper for pragma optimize

Author: alexcwatt

lib/sqlite3/pragmas.rb

@@ -338,6 +338,14 @@ def mmap_size=(size)
       set_int_pragma "mmap_size", size
     end
 
+    def optimize(bitmask = nil)
+      if bitmask
+        set_int_pragma "optimize", bitmask
+      else
+        execute("PRAGMA optimize")
+      end
+    end
+
     def page_count
       get_int_pragma "page_count"
     end

test/test_pragmas.rb

@@ -32,5 +32,15 @@ def test_set_boolean_pragma
     ensure
       @db.set_boolean_pragma("read_uncommitted", 0)
     end
+
+    def test_pragma_optimize_without_args
+      @db.expects(:execute).with("PRAGMA optimize")
+      @db.pragma_optimize
+    end
+
+    def test_pragma_optimize_with_args
+      @db.expects(:execute).with("PRAGMA optimize(16)")
+      @db.pragma_optimize(0x10)
+    end
   end
 end