Empty string is now considered an invalid query

lib/google-search/search/base.rb

@@ -138,7 +138,7 @@ def get_uri
     #:nodoc:
 
     def get_uri_params
-      raise Error, "invalid query `#{query}'" unless query.respond_to? :to_str
+      raise Error, "invalid query `#{query}'" unless query.respond_to?(:to_str) && !query.to_str.empty?
       raise Error, "invalid API version `#{version}'" unless Numeric === version
       [[:start, offset],
       [:rsz, size],

spec/search_spec.rb

@@ -26,14 +26,20 @@
       search.get_uri.should == 'http://www.google.com/uds/GwebSearch?start=0&rsz=large&hl=en&key=notsupplied&v=1.0&q=foo&foo=bar'
     end
 
-    it "should raise an error when no query string is present" do
-      @search.query = nil
-      lambda { @search.get_uri }.should raise_error(Google::Search::Error, /query/)
+    describe "query" do
+      it "should raise an error when no query string is present" do
+        @search.query = nil
+        lambda { @search.get_uri }.should raise_error(Google::Search::Error, /query/)
+        @search.query = ''
+        lambda { @search.get_uri }.should raise_error(Google::Search::Error, /query/)
+      end
     end
 
-    it "should raise an error when version is not present" do
-      @search.version = nil
-      lambda { @search.get_uri }.should raise_error(Google::Search::Error, /version/)
+    describe "version" do
+      it "should raise an error when it is not present" do
+        @search.version = nil
+        lambda { @search.get_uri }.should raise_error(Google::Search::Error, /version/)
+      end
     end
   end
 
@@ -90,7 +96,7 @@
   end
 
   describe "#get_uri" do
-    describe "#filter" do
+    describe "filter" do
       it "should default to 1" do
         @search.get_uri.should include('filter=1')
       end