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require_relative '../../spec_helper'
describe "FrozenError.new" do
it "should take optional receiver argument" do
o = Object.new
FrozenError.new("msg", receiver: o).receiver.should equal(o)
end
end
describe "FrozenError#receiver" do
it "should return frozen object that modification was attempted on" do
o = Object.new.freeze
begin
def o.x; end
rescue => e
e.should be_kind_of(FrozenError)
e.receiver.should equal(o)
else
raise
end
end
end
describe "Modifying a frozen object" do
context "#inspect is redefined and modifies the object" do
it "returns ... instead of String representation of object" do
object = Object.new
def object.inspect; @a = 1 end
def object.modify; @a = 2 end
object.freeze
# CRuby's message contains multiple whitespaces before '...'.
# So handle both multiple and single whitespace.
-> { object.modify }.should raise_error(FrozenError, /can't modify frozen .*?: \s*.../)
end
end
end
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