diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/test')
-rw-r--r-- | activesupport/lib/active_support/core_ext/test/difference.rb | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/test/difference.rb b/activesupport/lib/active_support/core_ext/test/difference.rb new file mode 100644 index 0000000000..1f85f0f4b7 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/test/difference.rb @@ -0,0 +1,29 @@ + +module Test #:nodoc: + module Unit #:nodoc: + class TestCase #:nodoc: + + # Test difference between the return value of method on object for duration of the block + def assert_difference(objects, method = nil, difference = 1) + objects = [objects].flatten + initial_values = objects.inject([]) { |sum,obj| sum << obj.send(method) } + yield + if difference.nil? + objects.each_with_index { |obj,i| + assert_not_equal initial_values[i], obj.send(method), "#{obj}##{method}" + } + else + objects.each_with_index { |obj,i| + assert_equal initial_values[i] + difference, obj.send(method), "#{obj}##{method}" + } + end + end + + # Test absence of difference between the return value of method on object for duration of the block + def assert_no_difference(objects, method = nil, &block) + assert_difference objects, method, 0, &block + end + + end + end +end |