adding unit tests for repository classes

test/models/repository_environments_test.rb

+require 'test_helper'
+require 'test_model_repository'
+
+class RepositoryEnvironmentsTest < ActiveSupport::TestCase
+
+  def setup
+    RepositoryEnvironments.create :test_env do |repository|
+      repository.register :test_model, TestModelRepository.new
+    end
+  end
+
+  test 'can create a repositories inside env' do
+    RepositoryEnvironments.create :test_specific_env do |repository|
+      repository.register :test_model, TestModelRepository.new
+    end
+
+    assert_count 1, RepositoryEnvironments.fetch(:test_specific_env).repositories
+  end
+
+  test 'select a repository by environment' do
+    assert RepositoryEnvironments.fetch(:test_env).for(:test_model).working?
+  end
+
+end
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test/models/repository_test.rb

+require 'test_helper'
+require 'test_model_repository'
+
+class RepositoryTest < ActiveSupport::TestCase
+
+  def setup
+    @repository = Repository.new
+    @repository.register :test_model, TestModelRepository.new
+  end
+
+  test 'can register a repository' do
+    assert_count 1, @repository.repositories
+  end
+
+  test 'can unregister a repository' do
+    @repository.unregister :test_model
+    assert_count 0, @repository.repositories
+  end
+
+  test 'select a repository by type' do
+    assert @repository.for(:test_model).working?
+  end
+
+end
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test/test_model_repository.rb

+class TestModelRepository
+  def working?
+    true
+  end
+end
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