Sha256: f5211faf5ecb1029b942ada472bb0f95d17aa34e14833f463135fdd67d55f7e9
Contents?: true
Size: 1.65 KB
Versions: 47
Compression:
Stored size: 1.65 KB
Contents
#! /usr/bin/ruby
#encoding: utf-8
require 'test/unit'
require 'shoulda'
class NullObjectTest < Test::Unit::TestCase
context 'Object' do
setup do
require 'y_support/null_object'
end
should "Object have #null_object? (alias #null?)" do
require 'y_support/null_object'
assert_equal true, (class Koko < NullObject; self end).new.null_object?
assert_equal true, (class Koko < NullObject; self end).new.null?
assert_equal [false, false], [nil.null_object?, nil.null?]
assert_equal true, NullObject.new( :koko ).null?( :koko )
assert_equal false, NullObject.new( :koko ).null?( :pipi )
end
should "Object have #Maybe() constructor for something / NullObject" do
assert_equal NullObject, Maybe(nil).class
assert_equal 42, Maybe(42)
end
should "Object have #Null() constructor always returning NullObject" do
assert_equal NullObject, Null().class
end
end # context Object
context "NullObject" do
setup do
require 'y_support/null_object'
end
should "NullObject exist and comply" do
n = NullObject.new
assert_equal [[], "#<NullObject>", 0.0, 0], [n.to_a, n.to_s, n.to_f, n.to_i]
assert_equal [false, true], [n.present?, n.empty?]
assert_nothing_raised { NullObject.new.
must_have_attr_reader( :recorded_messages ) }
assert_respond_to NullObject.new, :arbitrary_message
n = NullObject.new :x
n.arbitrary_message( :a, :b ) { "hello" }
assert_equal :x, n.null_object_signature
assert_equal "#<NullObject kokotina>", NullObject.new( :kokotina ).inspect
end
end # context NullObject
end # class NullObjectTest
Version data entries
47 entries across 47 versions & 1 rubygems