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# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes.rb', __FILE__)
describe "String#chop" do
it "removes the final character" do
"abc".chop.should == "ab"
end
it "removes the final carriage return" do
"abc\r".chop.should == "abc"
end
it "removes the final newline" do
"abc\n".chop.should == "abc"
end
it "removes the final carriage return, newline" do
"abc\r\n".chop.should == "abc"
end
it "removes the carrige return, newline if they are the only characters" do
"\r\n".chop.should == ""
end
it "does not remove more than the final carriage return, newline" do
"abc\r\n\r\n".chop.should == "abc\r\n"
end
with_feature :encoding do
it "removes a multi-byte character" do
"あれ".chop.should == "あ"
end
it "removes the final carriage return, newline from a multibyte String" do
"あれ\r\n".chop.should == "あれ"
end
it "removes the final carriage return, newline from a non-ASCII String" do
str = "abc\r\n".encode "utf-32be"
str.chop.should == "abc".encode("utf-32be")
end
end
it "returns an empty string when applied to an empty string" do
"".chop.should == ""
end
it "returns a new string when applied to an empty string" do
s = ""
s.chop.should_not equal(s)
end
it "taints result when self is tainted" do
"hello".taint.chop.tainted?.should == true
"".taint.chop.tainted?.should == true
end
it "untrusts result when self is untrusted" do
"hello".untrust.chop.untrusted?.should == true
"".untrust.chop.untrusted?.should == true
end
it "returns subclass instances when called on a subclass" do
StringSpecs::MyString.new("hello\n").chop.should be_an_instance_of(StringSpecs::MyString)
end
end
describe "String#chop!" do
it "removes the final character" do
"abc".chop!.should == "ab"
end
it "removes the final carriage return" do
"abc\r".chop!.should == "abc"
end
it "removes the final newline" do
"abc\n".chop!.should == "abc"
end
it "removes the final carriage return, newline" do
"abc\r\n".chop!.should == "abc"
end
it "removes the carrige return, newline if they are the only characters" do
"\r\n".chop!.should == ""
end
it "does not remove more than the final carriage return, newline" do
"abc\r\n\r\n".chop!.should == "abc\r\n"
end
with_feature :encoding do
it "removes a multi-byte character" do
"あれ".chop!.should == "あ"
end
it "removes the final carriage return, newline from a multibyte String" do
"あれ\r\n".chop!.should == "あれ"
end
it "removes the final carriage return, newline from a non-ASCII String" do
str = "abc\r\n".encode "utf-32be"
str.chop!.should == "abc".encode("utf-32be")
end
end
it "returns self if modifications were made" do
str = "hello"
str.chop!.should equal(str)
end
it "returns nil when called on an empty string" do
"".chop!.should be_nil
end
it "raises a RuntimeError on a frozen instance that is modified" do
lambda { "string\n\r".freeze.chop! }.should raise_error(RuntimeError)
end
# see [ruby-core:23666]
it "raises a RuntimeError on a frozen instance that would not be modified" do
a = ""
a.freeze
lambda { a.chop! }.should raise_error(RuntimeError)
end
end
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