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

# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "String#delete" do
  it "returns a new string with the chars from the intersection of sets removed" do
    s = "hello"
    s.delete("lo").should == "he"
    s.should == "hello"

    "hello".delete("l", "lo").should == "heo"

    "hell yeah".delete("").should == "hell yeah"
  end

  it "raises an ArgumentError when given no arguments" do
    -> { "hell yeah".delete }.should raise_error(ArgumentError)
  end

  it "negates sets starting with ^" do
    "hello".delete("aeiou", "^e").should == "hell"
    "hello".delete("^leh").should == "hell"
    "hello".delete("^o").should == "o"
    "hello".delete("^").should == "hello"
    "^_^".delete("^^").should == "^^"
    "oa^_^o".delete("a^").should == "o_o"
  end

  it "deletes all chars in a sequence" do
    "hello".delete("ej-m").should == "ho"
    "hello".delete("e-h").should == "llo"
    "hel-lo".delete("e-").should == "hllo"
    "hel-lo".delete("-h").should == "ello"
    "hel-lo".delete("---").should == "hello"
    "hel-012".delete("--2").should == "hel"
    "hel-()".delete("(--").should == "hel"
    "hello".delete("^e-h").should == "he"
    "hello^".delete("^^-^").should == "^"
    "hel--lo".delete("^---").should == "--"

    "abcdefgh".delete("a-ce-fh").should == "dg"
    "abcdefgh".delete("he-fa-c").should == "dg"
    "abcdefgh".delete("e-fha-c").should == "dg"

    "abcde".delete("ac-e").should == "b"
    "abcde".delete("^ac-e").should == "acde"

    "ABCabc[]".delete("A-a").should == "bc"
  end

  it "deletes multibyte characters" do
    "四月".delete("月").should == "四"
    '哥哥我倒'.delete('哥').should == "我倒"
  end

  it "respects backslash for escaping a -" do
    'Non-Authoritative Information'.delete(' \-\'').should ==
      'NonAuthoritativeInformation'
  end

  it "raises if the given ranges are invalid" do
    not_supported_on :opal do
      xFF = [0xFF].pack('C')
      range = "\x00 - #{xFF}".force_encoding('utf-8')
      -> { "hello".delete(range).should == "" }.should raise_error(ArgumentError)
    end
    -> { "hello".delete("h-e") }.should raise_error(ArgumentError)
    -> { "hello".delete("^h-e") }.should raise_error(ArgumentError)
  end

  ruby_version_is ''...'2.7' do
    it "taints result when self is tainted" do
      "hello".taint.delete("e").should.tainted?
      "hello".taint.delete("a-z").should.tainted?

      "hello".delete("e".taint).should_not.tainted?
    end
  end

  it "tries to convert each set arg to a string using to_str" do
    other_string = mock('lo')
    other_string.should_receive(:to_str).and_return("lo")

    other_string2 = mock('o')
    other_string2.should_receive(:to_str).and_return("o")

    "hello world".delete(other_string, other_string2).should == "hell wrld"
  end

  it "raises a TypeError when one set arg can't be converted to a string" do
    -> { "hello world".delete(100)       }.should raise_error(TypeError)
    -> { "hello world".delete([])        }.should raise_error(TypeError)
    -> { "hello world".delete(mock('x')) }.should raise_error(TypeError)
  end

  ruby_version_is ''...'3.0' do
    it "returns subclass instances when called on a subclass" do
      StringSpecs::MyString.new("oh no!!!").delete("!").should be_an_instance_of(StringSpecs::MyString)
    end
  end

  ruby_version_is '3.0' do
    it "returns String instances when called on a subclass" do
      StringSpecs::MyString.new("oh no!!!").delete("!").should be_an_instance_of(String)
    end
  end
end

describe "String#delete!" do
  it "modifies self in place and returns self" do
    a = "hello"
    a.delete!("aeiou", "^e").should equal(a)
    a.should == "hell"
  end

  it "returns nil if no modifications were made" do
    a = "hello"
    a.delete!("z").should == nil
    a.should == "hello"
  end

  it "raises a FrozenError when self is frozen" do
    a = "hello"
    a.freeze

    -> { a.delete!("")            }.should raise_error(FrozenError)
    -> { a.delete!("aeiou", "^e") }.should raise_error(FrozenError)
  end
end