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

require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes.rb', __FILE__)

describe "String#rstrip" do
  it "returns a copy of self with trailing whitespace removed" do
    "  hello  ".rstrip.should == "  hello"
    "  hello world  ".rstrip.should == "  hello world"
    "  hello world \n\r\t\n\v\r".rstrip.should == "  hello world"
    "hello".rstrip.should == "hello"
    "hello\x00".rstrip.should == "hello"
  end

  it "returns a copy of self with all trailing whitespace and NULL bytes removed" do
    "\x00 \x00hello\x00 \x00".rstrip.should == "\x00 \x00hello"
  end

  it "taints the result when self is tainted" do
    "".taint.rstrip.tainted?.should == true
    "ok".taint.rstrip.tainted?.should == true
    "ok    ".taint.rstrip.tainted?.should == true
  end
end

describe "String#rstrip!" do
  it "modifies self in place and returns self" do
    a = "  hello  "
    a.rstrip!.should equal(a)
    a.should == "  hello"
  end

  it "modifies self removing trailing NULL bytes and whitespace" do
    a = "\x00 \x00hello\x00 \x00"
    a.rstrip!
    a.should == "\x00 \x00hello"
  end

  it "returns nil if no modifications were made" do
    a = "hello"
    a.rstrip!.should == nil
    a.should == "hello"
  end

  it "raises a #{frozen_error_class} on a frozen instance that is modified" do
    lambda { "  hello  ".freeze.rstrip! }.should raise_error(frozen_error_class)
  end

  # see [ruby-core:23666]
  it "raises a #{frozen_error_class} on a frozen instance that would not be modified" do
    lambda { "hello".freeze.rstrip! }.should raise_error(frozen_error_class)
    lambda { "".freeze.rstrip!      }.should raise_error(frozen_error_class)
  end
end