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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/concat'
describe "String#+" do
it_behaves_like :string_concat_encoding, :+
it_behaves_like :string_concat_type_coercion, :+
it "returns a new string containing the given string concatenated to self" do
("" + "").should == ""
("" + "Hello").should == "Hello"
("Hello" + "").should == "Hello"
("Ruby !" + "= Rubinius").should == "Ruby != Rubinius"
end
it "converts any non-String argument with #to_str" do
c = mock 'str'
c.should_receive(:to_str).any_number_of_times.and_return(' + 1 = 2')
("1" + c).should == '1 + 1 = 2'
end
it "raises a TypeError when given any object that fails #to_str" do
-> { "" + Object.new }.should raise_error(TypeError)
-> { "" + 65 }.should raise_error(TypeError)
end
it "doesn't return subclass instances" do
(StringSpecs::MyString.new("hello") + "").should be_an_instance_of(String)
(StringSpecs::MyString.new("hello") + "foo").should be_an_instance_of(String)
(StringSpecs::MyString.new("hello") + StringSpecs::MyString.new("foo")).should be_an_instance_of(String)
(StringSpecs::MyString.new("hello") + StringSpecs::MyString.new("")).should be_an_instance_of(String)
(StringSpecs::MyString.new("") + StringSpecs::MyString.new("")).should be_an_instance_of(String)
("hello" + StringSpecs::MyString.new("foo")).should be_an_instance_of(String)
("hello" + StringSpecs::MyString.new("")).should be_an_instance_of(String)
end
end
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