fix: Test fixes (#426)

* MiniTest -> Minitest

* use force: :cascade so tables can be recreated regardless of constraints

* require tag_examples module where it's used

Otherwise it's specs would be loaded / run out of context leading to
many errors like this:

  1) Error:
TagExamples::from empty db::lowest_common_ancestor#test_0009_is itself for single item:
NameError: uninitialized class variable @@described_class in TagExamples
Did you mean?  describe
    /closure_tree/test/support/tag_examples.rb:10:in `block (2 levels) in <module:TagExamples>'

when trying to run a single test, i.e.

bundle exec rake test TESTOPTS="--seed=10410" TEST=test/closure_tree/parallel_test.rb

* revert to :truncation DatabaseCleaner strategy

- same as specs, fixes parallel_test

spec/support/schema.rb

@@ -1,21 +1,21 @@
 # frozen_string_literal: true
 
 ActiveRecord::Schema.define(version: 0) do
-  create_table 'tags', force: true do |t|
+  create_table 'tags', force: :cascade do |t|
     t.string 'name'
     t.string 'title'
     t.references 'parent'
     t.integer 'sort_order'
     t.timestamps null: false
   end
 
-  create_table 'tag_hierarchies', id: false, force: true do |t|
+  create_table 'tag_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'uuid_tags', id: false, force: true do |t|
+  create_table 'uuid_tags', id: false, force: :cascade do |t|
     t.string 'uuid', unique: true
     t.string 'name'
     t.string 'title'
@@ -24,115 +24,115 @@
     t.timestamps null: false
   end
 
-  create_table 'uuid_tag_hierarchies', id: false, force: true do |t|
+  create_table 'uuid_tag_hierarchies', id: false, force: :cascade do |t|
     t.string 'ancestor_id', null: false
     t.string 'descendant_id', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'destroyed_tags', force: true do |t|
+  create_table 'destroyed_tags', force: :cascade do |t|
     t.string 'name'
   end
 
   add_index 'tag_hierarchies', %i[ancestor_id descendant_id generations], unique: true,
                                                                           name: 'tag_anc_desc_idx'
   add_index 'tag_hierarchies', [:descendant_id], name: 'tag_desc_idx'
 
-  create_table 'groups', force: true do |t|
+  create_table 'groups', force: :cascade do |t|
     t.string 'name', null: false
   end
 
-  create_table 'groupings', force: true do |t|
+  create_table 'groupings', force: :cascade do |t|
     t.string 'name', null: false
   end
 
-  create_table 'user_sets', force: true do |t|
+  create_table 'user_sets', force: :cascade do |t|
     t.string 'name', null: false
   end
 
-  create_table 'teams', force: true do |t|
+  create_table 'teams', force: :cascade do |t|
     t.string 'name', null: false
   end
 
-  create_table 'users', force: true do |t|
+  create_table 'users', force: :cascade do |t|
     t.string 'email'
     t.references 'referrer'
     t.integer 'group_id'
     t.timestamps null: false
   end
 
-  create_table 'contracts', force: true do |t|
+  create_table 'contracts', force: :cascade do |t|
     t.references 'user', null: false
     t.references 'contract_type'
     t.string 'title'
   end
 
-  create_table 'contract_types', force: true do |t|
+  create_table 'contract_types', force: :cascade do |t|
     t.string 'name', null: false
   end
 
-  create_table 'referral_hierarchies', id: false, force: true do |t|
+  create_table 'referral_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'labels', force: true do |t|
+  create_table 'labels', force: :cascade do |t|
     t.string 'name'
     t.string 'type'
     t.integer 'column_whereby_ordering_is_inferred'
     t.references 'mother'
   end
 
-  create_table 'label_hierarchies', id: false do |t|
+  create_table 'label_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'cuisine_types', force: true do |t|
+  create_table 'cuisine_types', force: :cascade do |t|
     t.string 'name'
     t.references 'parent'
   end
 
-  create_table 'cuisine_type_hierarchies', id: false, force: true do |t|
+  create_table 'cuisine_type_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'namespace_types', force: true do |t|
+  create_table 'namespace_types', force: :cascade do |t|
     t.string 'name'
     t.references 'parent'
   end
 
-  create_table 'namespace_type_hierarchies', id: false, force: true do |t|
+  create_table 'namespace_type_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'metal', force: true do |t|
+  create_table 'metal', force: :cascade do |t|
     t.references 'parent'
     t.string 'metal_type'
     t.string 'value'
     t.string 'description'
     t.integer 'sort_order'
   end
 
-  create_table 'metal_hierarchies', id: false, force: true do |t|
+  create_table 'metal_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false
   end
 
-  create_table 'menu_items', force: true do |t|
+  create_table 'menu_items', force: :cascade do |t|
     t.string 'name'
     t.references 'parent'
     t.timestamps null: false
   end
 
-  create_table 'menu_item_hierarchies', id: false, force: true do |t|
+  create_table 'menu_item_hierarchies', id: false, force: :cascade do |t|
     t.references 'ancestor', null: false
     t.references 'descendant', null: false
     t.integer 'generations', null: false

test/closure_tree/tag_test.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'test_helper'
+require 'support/tag_examples'
 
 describe Tag do
   include TagExamples

test/closure_tree/uuid_tag_test.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'test_helper'
+require 'support/tag_examples'
 
 describe UUIDTag do
   include TagExamples

test/test_helper.rb

@@ -43,9 +43,9 @@ def sqlite?
 ActiveRecord::Base.connection.recreate_database('closure_tree_test') unless sqlite?
 puts "Testing with #{env_db} database, ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
 
-DatabaseCleaner.strategy = :transaction
+DatabaseCleaner.strategy = :truncation
 
-module MiniTest
+module Minitest
   class Spec
     include QueryCounter
 
@@ -67,4 +67,3 @@ class Spec
 require 'closure_tree'
 require_relative '../spec/support/schema'
 require_relative '../spec/support/models'
-require 'support/tag_examples'