55 lines
784 B
Ruby
55 lines
784 B
Ruby
# frozen_string_literal: false
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require 'test/unit'
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class TestUndef < Test::Unit::TestCase
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class Undef0
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def foo
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"foo"
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end
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undef foo
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end
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class Undef1
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def bar
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"bar"
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end
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end
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class Undef2 < Undef1
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undef bar
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end
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def test_undef
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x = Undef0.new
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assert_raise(NoMethodError) { x.foo }
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y = Undef1.new
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assert_equal "bar", y.bar
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z = Undef2.new
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assert_raise(NoMethodError) { z.bar }
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end
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def test_special_const_undef
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assert_raise(TypeError) do
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1.instance_eval do
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undef to_s
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end
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end
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end
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def test_singleton_undef
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klass = Class.new do
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def foo
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:ok
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end
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end
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klass.new.foo
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klass.new.instance_eval do
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undef foo
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end
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klass.new.foo
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end
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end
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