Move escape_uri method to a more suitable place

spec/components/url_helper_spec.rb

@@ -79,4 +79,26 @@ describe UrlHelper do
 
   end
 
+  describe "#escape_uri" do
+    it "doesn't escape simple URL" do
+      url = UrlHelper.escape_uri('http://example.com/foo/bar')
+      expect(url).to eq('http://example.com/foo/bar')
+    end
+
+    it "escapes unsafe chars" do
+      url = UrlHelper.escape_uri("http://example.com/?a=\11\15")
+      expect(url).to eq('http://example.com/?a=%09%0D')
+    end
+
+    it "escapes non-ascii chars" do
+      url = UrlHelper.escape_uri('http://example.com/ماهی')
+      expect(url).to eq('http://example.com/%D9%85%D8%A7%D9%87%DB%8C')
+    end
+
+    it "doesn't escape already escaped chars" do
+      url = UrlHelper.escape_uri('http://example.com/foo%20bar/foo bar/')
+      expect(url).to eq('http://example.com/foo%20bar/foo%20bar/')
+    end
+  end
+
 end