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require 'test/unit'
class TestFrozenError < Test::Unit::TestCase
def test_new_default
exc = FrozenError.new
assert_equal("FrozenError", exc.message)
assert_raise_with_message(ArgumentError, "no receiver is available") {
exc.receiver
}
end
def test_new_message
exc = FrozenError.new("bar")
assert_equal("bar", exc.message)
assert_raise_with_message(ArgumentError, "no receiver is available") {
exc.receiver
}
end
def test_new_receiver
obj = Object.new
exc = FrozenError.new("bar", receiver: obj)
assert_equal("bar", exc.message)
assert_same(obj, exc.receiver)
end
def test_message
obj = Object.new.freeze
e = assert_raise_with_message(FrozenError, /can't modify frozen #{obj.class}/) {
obj.instance_variable_set(:@test, true)
}
assert_include(e.message, obj.inspect)
klass = Class.new do
def init
@x = true
end
def inspect
init
super
end
end
obj = klass.new.freeze
e = assert_raise_with_message(FrozenError, /can't modify frozen #{obj.class}/) {
obj.init
}
assert_include(e.message, klass.inspect)
end
def test_receiver
obj = Object.new.freeze
e = assert_raise(FrozenError) {def obj.foo; end}
assert_same(obj, e.receiver)
e = assert_raise(FrozenError) {obj.singleton_class.const_set(:A, 2)}
assert_same(obj.singleton_class, e.receiver)
end
end
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