Model validations

test/models/wrestler_test.rb

@@ -4,4 +4,10 @@ class WrestlerTest < ActiveSupport::TestCase
    test "the truth" do
      assert true
    end
+   
+   test "Wrestler validations" do
+      wrestler = Wrestler.new
+      assert_not wrestler.valid?
+      assert_equal [:name, :weight_id, :school_id], wrestler.errors.keys
+    end
 end