test: cover OrmBelongsToTouchTest, teardown and OrmCacheKeyTest

test/test_orm_cache_key.rb

@@ -0,0 +1,45 @@
+require 'minitest/autorun'
+require 'prism'
+require 'tmpdir'
+
+class OrmCacheKeyTest < Minitest::Test
+  def setup
+    Object.send(:remove_const, :Snippet) if Object.const_defined?(:Snippet)
+    @dir = Dir.mktmpdir('prism-cache-key-store')
+    @store = Prism::Orm::Store.new(File.join(@dir, 'test.pstore'))
+    @store.create_table(:snippets, %w[id body created_at updated_at])
+
+    snippet_class = Class.new(Prism::Orm::Model) { table_name :snippets }
+    snippet_class.store = @store
+    Object.const_set(:Snippet, snippet_class)
+  end
+
+  def teardown
+    FileUtils.remove_entry(@dir)
+    Object.send(:remove_const, :Snippet) if Object.const_defined?(:Snippet)
+  end
+
+  def test_cache_key_includes_table_name_and_id
+    snippet = Snippet.create!(body: 'hello')
+    assert_equal "snippets/#{snippet.id}-#{snippet.updated_at.to_i}", snippet.cache_key
+  end
+
+  def test_cache_key_changes_when_the_record_is_touched
+    snippet = Snippet.create!(body: 'hello')
+    original = snippet.cache_key
+    sleep 1.01
+    snippet.update!(body: 'goodbye')
+    refute_equal original, snippet.cache_key
+  end
+
+  def test_cache_key_without_timestamps_falls_back_to_table_and_id
+    Object.send(:remove_const, :Snippet)
+    @store.create_table(:plain_snippets, %w[id body])
+    plain_class = Class.new(Prism::Orm::Model) { table_name :plain_snippets }
+    plain_class.store = @store
+    Object.const_set(:Snippet, plain_class)
+
+    snippet = Snippet.create!(body: 'hello')
+    assert_equal "plain_snippets/#{snippet.id}", snippet.cache_key
+  end
+end