ruby--ruby/spec/ruby/core/symbol/casecmp_spec.rb

# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)

describe "Symbol#casecmp with Symbol" do
  it "compares symbols without regard to case" do
    :abcdef.casecmp(:abcde).should == 1
    :aBcDeF.casecmp(:abcdef).should == 0
    :abcdef.casecmp(:abcdefg).should == -1
    :abcdef.casecmp(:ABCDEF).should == 0
  end

  it "doesn't consider non-ascii characters equal that aren't" do
    # -- Latin-1 --
    upper_a_tilde  = "\xC3".b.to_sym
    upper_a_umlaut = "\xC4".b.to_sym
    lower_a_tilde  = "\xE3".b.to_sym
    lower_a_umlaut = "\xE4".b.to_sym

    lower_a_tilde.casecmp(lower_a_umlaut).should_not == 0
    lower_a_umlaut.casecmp(lower_a_tilde).should_not == 0
    upper_a_tilde.casecmp(upper_a_umlaut).should_not == 0
    upper_a_umlaut.casecmp(upper_a_tilde).should_not == 0

    # -- UTF-8 --
    upper_a_tilde  = :"Ã"
    lower_a_tilde  = :"ã"
    upper_a_umlaut = :"Ä"
    lower_a_umlaut = :"ä"

    lower_a_tilde.casecmp(lower_a_umlaut).should_not == 0
    lower_a_umlaut.casecmp(lower_a_tilde).should_not == 0
    upper_a_tilde.casecmp(upper_a_umlaut).should_not == 0
    upper_a_umlaut.casecmp(upper_a_tilde).should_not == 0
  end

  it "doesn't do case mapping for non-ascii characters" do
    # -- Latin-1 --
    upper_a_tilde  = "\xC3".b.to_sym
    upper_a_umlaut = "\xC4".b.to_sym
    lower_a_tilde  = "\xE3".b.to_sym
    lower_a_umlaut = "\xE4".b.to_sym

    upper_a_tilde.casecmp(lower_a_tilde).should == -1
    upper_a_umlaut.casecmp(lower_a_umlaut).should == -1
    lower_a_tilde.casecmp(upper_a_tilde).should == 1
    lower_a_umlaut.casecmp(upper_a_umlaut).should == 1

    # -- UTF-8 --
    upper_a_tilde  = :"Ã"
    lower_a_tilde  = :"ã"
    upper_a_umlaut = :"Ä"
    lower_a_umlaut = :"ä"

    upper_a_tilde.casecmp(lower_a_tilde).should == -1
    upper_a_umlaut.casecmp(lower_a_umlaut).should == -1
    lower_a_tilde.casecmp(upper_a_tilde).should == 1
    lower_a_umlaut.casecmp(upper_a_umlaut).should == 1
  end
end

describe "Symbol#casecmp" do
  it "returns nil if other is a String" do
    :abc.casecmp("abc").should be_nil
  end

  it "returns nil if other is a Fixnum" do
    :abc.casecmp(1).should be_nil
  end

  it "returns nil if other is an object" do
    obj = mock("string <=>")
    :abc.casecmp(obj).should be_nil
  end
end

ruby_version_is "2.4" do
  describe 'Symbol#casecmp?' do
    it "compares symbols without regard to case" do
      :abcdef.casecmp?(:abcde).should == false
      :aBcDeF.casecmp?(:abcdef).should == true
      :abcdef.casecmp?(:abcdefg).should == false
      :abcdef.casecmp?(:ABCDEF).should == true
    end

    it "doesn't consider non-ascii characters equal that aren't" do
      # -- Latin-1 --
      upper_a_tilde  = "\xC3".b.to_sym
      upper_a_umlaut = "\xC4".b.to_sym
      lower_a_tilde  = "\xE3".b.to_sym
      lower_a_umlaut = "\xE4".b.to_sym

      lower_a_tilde.casecmp?(lower_a_umlaut).should_not == true
      lower_a_umlaut.casecmp?(lower_a_tilde).should_not == true
      upper_a_tilde.casecmp?(upper_a_umlaut).should_not == true
      upper_a_umlaut.casecmp?(upper_a_tilde).should_not == true

      # -- UTF-8 --
      upper_a_tilde  = :"Ã"
      lower_a_tilde  = :"ã"
      upper_a_umlaut = :"Ä"
      lower_a_umlaut = :"ä"

      lower_a_tilde.casecmp?(lower_a_umlaut).should_not == true
      lower_a_umlaut.casecmp?(lower_a_tilde).should_not == true
      upper_a_tilde.casecmp?(upper_a_umlaut).should_not == true
      upper_a_umlaut.casecmp?(upper_a_tilde).should_not == true
    end

    it "doesn't do case mapping for non-ascii and non-unicode characters" do
      # -- Latin-1 --
      upper_a_tilde  = "\xC3".b.to_sym
      upper_a_umlaut = "\xC4".b.to_sym
      lower_a_tilde  = "\xE3".b.to_sym
      lower_a_umlaut = "\xE4".b.to_sym

      upper_a_tilde.casecmp?(lower_a_tilde).should == false
      upper_a_umlaut.casecmp?(lower_a_umlaut).should == false
      lower_a_tilde.casecmp?(upper_a_tilde).should == false
      lower_a_umlaut.casecmp?(upper_a_umlaut).should == false
    end

    it 'does case mapping for unicode characters' do
      # -- UTF-8 --
      upper_a_tilde  = :"Ã"
      lower_a_tilde  = :"ã"
      upper_a_umlaut = :"Ä"
      lower_a_umlaut = :"ä"

      upper_a_tilde.casecmp?(lower_a_tilde).should == true
      upper_a_umlaut.casecmp?(lower_a_umlaut).should == true
      lower_a_tilde.casecmp?(upper_a_tilde).should == true
      lower_a_umlaut.casecmp?(upper_a_umlaut).should == true
    end

    it 'returns nil when comparing characters with different encodings' do
      # -- Latin-1 --
      upper_a_tilde = "\xC3".b.to_sym

      # -- UTF-8 --
      lower_a_tilde = :"ã"

      upper_a_tilde.casecmp?(lower_a_tilde).should == nil
      lower_a_tilde.casecmp?(upper_a_tilde).should == nil
    end
  end
end