Add a proper test suite of the schema helper

test/schema_test.rb

@@ -0,0 +1,69 @@
+
+require 'test/helper'
+require 'ostruct'
+
+class MockSchema
+  include Paperclip::Schema
+
+  def initialize(table_name = nil)
+    @table_name = table_name
+    @columns = {}
+  end
+
+  def column(name, type)
+    @columns[name] = type
+  end
+
+  def remove_column(table_name, column_name)
+    @columns.delete(column_name)
+  end
+
+  def has_column?(column_name)
+    @columns.key?(column_name)
+  end
+
+  def type_of(column_name)
+    @columns[column_name]
+  end
+end
+
+class SchemaTest < Test::Unit::TestCase
+  context "Migrating up" do
+    setup do
+      @schema = MockSchema.new
+      @schema.has_attached_file :avatar
+    end
+
+    should "create the file_name column" do
+      assert @schema.has_column?(:avatar_file_name)
+    end
+
+    should "create the content_type column" do
+      assert @schema.has_column?(:avatar_content_type)
+    end
+
+    should "create the file_size column" do
+      assert @schema.has_column?(:avatar_file_size)
+    end
+
+    should "create the updated_at column" do
+      assert @schema.has_column?(:avatar_updated_at)
+    end
+
+    should "make the file_name column a string" do
+      assert_equal :string, @schema.type_of(:avatar_file_name)
+    end
+
+    should "make the content_type column a string" do
+      assert_equal :string, @schema.type_of(:avatar_content_type)
+    end
+
+    should "make the file_size column an integer" do
+      assert_equal :integer, @schema.type_of(:avatar_file_size)
+    end
+
+    should "make the updated_at column a datetime" do
+      assert_equal :datetime, @schema.type_of(:avatar_updated_at)
+    end
+  end
+end