Add some more tests for library code

test/lib/country_test.rb

@@ -0,0 +1,28 @@
+require 'test_helper'
+
+class CountryTest < ActiveSupport::TestCase
+  def test_gb
+    gb = Country.find_by_code("GB")
+    assert_not_nil gb
+    assert_equal "GB", gb.code
+    assert_equal -8.623555, gb.min_lon
+    assert_equal 59.360249, gb.max_lat
+    assert_equal 1.759, gb.max_lon
+    assert_equal 49.906193, gb.min_lat
+  end
+
+  def test_au
+    au = Country.find_by_code("AU")
+    assert_not_nil au
+    assert_equal "AU", au.code
+    assert_equal 112.911057, au.min_lon
+    assert_equal -10.062805, au.max_lat
+    assert_equal 153.639252, au.max_lon
+    assert_equal -43.64397, au.min_lat
+  end
+
+  def test_xx
+    xx = Country.find_by_code("XX")
+    assert_nil xx
+  end
+end