specs for services

spec/support/expectations/equal_exercise.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'rspec/expectations'
+
+RSpec::Matchers.define :be_an_equal_exercise_as do |exercise|
+  match do |actual|
+    equal?(actual, exercise)
+  end
+  failure_message do |actual|
+    "#{actual.inspect} is not equal to \n#{exercise.inspect}. \nLast checked attribute: #{@last_checked}"
+  end
+
+  def equal?(object, other)
+    return false unless object.class == other.class
+    return attributes_equal?(object, other) if object.is_a?(ApplicationRecord)
+    return array_equal?(object, other) if object.is_a?(Array) || object.is_a?(ActiveRecord::Associations::CollectionProxy)
+
+    object == other
+  end
+
+  def attributes_equal?(object, other)
+    other_attributes = attributes_and_associations(other)
+    attributes_and_associations(object).each do |k, v|
+      @last_checked = "#{k}: \n\"#{v}\" vs \n\"#{other_attributes[k]}\""
+      return false unless equal?(other_attributes[k], v)
+    end
+    true
+  end
+
+  def array_equal?(object, other)
+    return true if object == other # for []
+    return false if object.length != other.length
+
+    object.to_a.product(other.to_a).map { |k, v| equal?(k, v) }.any?
+  end
+
+  def attributes_and_associations(object)
+    object.attributes.dup.tap do |attributes|
+      attributes[:files] = object.files if defined? object.files
+    end.except('id', 'created_at', 'updated_at', 'exercise_id', 'uuid', 'import_checksum')
+  end
+end