replaces length 9 validation by format validation: only numbers, spaces and plus sign allowed

spec/models/sms_spec.rb

@@ -7,9 +7,16 @@ describe Verification::Sms do
   end
 
   it "should validate uniqness of phone" do
-    user = create(:user, confirmed_phone: "699999999")
+    create(:user, confirmed_phone: "699999999")
     sms = Verification::Sms.new(phone: "699999999")
     expect(sms).to_not be_valid
   end
 
-end
+  it "only allows spaces, numbers and the + sign" do
+    expect(build(:verification_sms, phone: "0034 666666666")).to be_valid
+    expect(build(:verification_sms, phone: "+34 666666666")).to be_valid
+    expect(build(:verification_sms, phone: "hello there")).to_not be_valid
+    expect(build(:verification_sms, phone: "555; DROP TABLE USERS")).to_not be_valid
+  end
+
+end