Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
branch: master
Fetching contributors…

Cannot retrieve contributors at this time

57 lines (46 sloc) 1.483 kB
require File.expand_path(File.dirname(__FILE__) + '/edgecase')
class AboutObjects < EdgeCase::Koan
def test_everything_is_an_object
assert_equal true, 1.is_a?(Object)
assert_equal true, 1.5.is_a?(Object)
assert_equal true, "string".is_a?(Object)
assert_equal true, nil.is_a?(Object)
assert_equal true, Object.is_a?(Object)
end
def test_objects_can_be_converted_to_strings
assert_equal "123", 123.to_s
assert_equal "", nil.to_s
end
def test_objects_can_be_inspected
assert_equal "123", 123.inspect
assert_equal "nil", nil.inspect
end
def test_every_object_has_an_id
obj = Object.new
assert_equal Fixnum, obj.object_id.class
end
def test_every_object_has_different_id
obj = Object.new
another_obj = Object.new
assert_equal true, obj.object_id != another_obj.object_id
end
def test_some_system_objects_always_have_the_same_id
assert_equal 0, false.object_id
assert_equal 2, true.object_id
assert_equal 4, nil.object_id
end
def test_small_integers_have_fixed_ids
assert_equal 1, 0.object_id
assert_equal 3, 1.object_id
assert_equal 5, 2.object_id
assert_equal 201, 100.object_id
# THINK ABOUT IT:
# What pattern do the object IDs for small integers follow?
end
def test_clone_creates_a_different_object
obj = Object.new
copy = obj.clone
assert_equal true, obj != copy
assert_equal true, obj.object_id != copy.object_id
end
end
Jump to Line
Something went wrong with that request. Please try again.