Add test for numeric slug

test/numeric_slug_test.rb

@@ -0,0 +1,31 @@
+require 'helper'
+
+class NumericSlugTest < TestCaseClass
+  include FriendlyId::Test
+  include FriendlyId::Test::Shared::Core
+
+  def model_class
+    Article
+  end
+
+  test "should generate numeric slugs" do
+    transaction do
+      record = model_class.create! :name => "123"
+      assert_equal "123", record.slug
+    end
+  end
+
+  test "should find by numeric slug" do
+    transaction do
+      record = model_class.create! :name => "123"
+      assert_equal model_class.friendly.find("123").id, record.id
+    end
+  end
+
+  test "should exist? by numeric slug" do
+    transaction do
+      record = model_class.create! :name => "123"
+      assert model_class.friendly.exists?("123")
+    end
+  end
+end