Use require instead of require_dependency

refs #45, where ActiveStorage has a circular dependency which fails to
load in one ordering (but not in the other).

As far as I can tell, `require_dependency` is mostly useful for
reloading, and since the entire use case in
`lib/consistency_fail/models.rb` is about *preloading*, this doesn't
seem necessary. Maybe this was necessary back when I was using
`ObjectSpace` as a terrible hack? Anyway, `require` it is.

This also sorts dependencies in any given `LOAD_PATH` directory before
loading them in sequence, just so whatever issues happen along these
lines in the future are more easily repeatable.

Gemfile

@@ -4,3 +4,7 @@ source "https://rubygems.org"
 gemspec
 
 gem 'pry'
+
+group :test do
+  gem 'activesupport', '~> 5.0'
+end

lib/consistency_fail/models.rb

@@ -17,8 +17,9 @@ def dirs
 
     def preload_all
       self.dirs.each do |d|
-        Dir.glob(File.join(d, "**", "*.rb")).each do |model_filename|
-          Kernel.require_dependency model_filename
+        ruby_files = Dir.glob(File.join(d, "**", "*.rb")).sort
+        ruby_files.each do |model_filename|
+          Kernel.require model_filename
         end
       end
     end

spec/index_spec.rb

@@ -1,13 +1,16 @@
+require_relative 'support/models/correct_address'
+require_relative 'support/models/wrong_address'
+
 describe ConsistencyFail::Index do
-  
+
   let(:index) do
     ConsistencyFail::Index.new(
-      CorrectAddress, 
-      CorrectAddress.table_name, 
+      CorrectAddress,
+      CorrectAddress.table_name,
       ["city", "state"]
     )
   end
-  
+
   describe "value objectiness" do
     it "holds onto model, table name, and columns" do
       expect(index.model).to eq(CorrectAddress)
@@ -24,12 +27,12 @@
     end
   end
 
-  describe "equality test" do  
+  describe "equality test" do
     it "passes when everything matches" do
       expect(index).to eq(
         ConsistencyFail::Index.new(
-          "CorrectAddress".constantize, 
-          "correct_addresses", 
+          "CorrectAddress".constantize,
+          "correct_addresses",
           ["city", "state"]
         )
       )
@@ -38,8 +41,8 @@
     it "fails when tables are different" do
       expect(index).not_to eq(
         ConsistencyFail::Index.new(
-          CorrectAttachment, 
-          CorrectAttachment.table_name, 
+          CorrectAttachment,
+          CorrectAttachment.table_name,
           ["attachable_id", "attachable_type"]
         )
       )
@@ -48,12 +51,12 @@
     it "fails when columns are different" do
       expect(index).not_to eq(
         ConsistencyFail::Index.new(
-          CorrectAddress, 
-          CorrectAddress.table_name, 
+          CorrectAddress,
+          CorrectAddress.table_name,
           ["correct_user_id"]
         )
       )
     end
   end
-  
+
 end

spec/models_spec.rb

@@ -1,5 +1,5 @@
 describe ConsistencyFail::Models do
-  
+
   def models(load_path)
     ConsistencyFail::Models.new(load_path)
   end
@@ -19,7 +19,7 @@ def models(load_path)
     expect(models.dirs).to eq([Pathname.new("app/models")])
   end
 
-  it "preloads models by calling require_dependency" do
+  it "preloads models" do
     models = models(["foo/bar/baz", "app/models", "some/other/models"])
     allow(Dir).to receive(:glob).
         with(File.join("app/models", "**", "*.rb")).
@@ -28,9 +28,9 @@ def models(load_path)
         with(File.join("some/other/models", "**", "*.rb")).
         and_return(["some/other/models/foo.rb"])
 
-    expect(Kernel).to receive(:require_dependency).with("app/models/user.rb")
-    expect(Kernel).to receive(:require_dependency).with("app/models/address.rb")
-    expect(Kernel).to receive(:require_dependency).with("some/other/models/foo.rb")
+    expect(Kernel).to receive(:require).with("app/models/user.rb")
+    expect(Kernel).to receive(:require).with("app/models/address.rb")
+    expect(Kernel).to receive(:require).with("some/other/models/foo.rb")
 
     models.preload_all
   end
@@ -44,5 +44,9 @@ def models(load_path)
 
     expect(models([]).all).to eq([model_a, model_c, model_b])
   end
-
+
+  it "preloads models successfully" do
+    models = models([File.join(File.dirname(__FILE__), "support/models")])
+    expect {models.preload_all}.not_to raise_error
+  end
 end

spec/spec_helper.rb

@@ -2,7 +2,10 @@
 
 Bundler.require(:default, :test)
 
-Dir['./spec/support/**/*.rb'].sort.each { |file| require file }
+require_relative 'support/active_record'
+require_relative 'support/schema'
+require 'active_support/dependencies'
+ActiveSupport::Dependencies.autoload_paths << './spec/support/models'
 
 RSpec.configure do |config|
   config.around do |example|

spec/support/models/blob.rb

@@ -0,0 +1,4 @@
+class Blob < ActiveRecord::Base
+  require_dependency 'blob/edible'
+  include Edible
+end

spec/support/models/blob/edible.rb

@@ -0,0 +1,2 @@
+module Blob::Edible
+end

spec/support/schema.rb

@@ -118,4 +118,8 @@
   execute 'CREATE VIEW new_correct_people AS '\
           'SELECT * FROM correct_people '\
           'WHERE created_at = updated_at'
+
+  create_table :blob do |t|
+    t.timestamps
+  end
 end