ruby--ruby/spec/ruby/core/string/concat_spec.rb

require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/concat'

describe "String#concat" do
  it_behaves_like :string_concat, :concat
  it_behaves_like :string_concat_encoding, :concat

  ruby_version_is "2.4" do
    it "takes multiple arguments" do
      str = "hello "
      str.concat "wo", "", "rld"
      str.should == "hello world"
    end

    it "concatenates the initial value when given arguments contain 2 self" do
      str = "hello"
      str.concat str, str
      str.should == "hellohellohello"
    end

    it "returns self when given no arguments" do
      str = "hello"
      str.concat.should equal(str)
      str.should == "hello"
    end
  end
end