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Diffstat (limited to 'spec/ruby/core/string/chomp_spec.rb')
-rw-r--r-- | spec/ruby/core/string/chomp_spec.rb | 387 |
1 files changed, 387 insertions, 0 deletions
diff --git a/spec/ruby/core/string/chomp_spec.rb b/spec/ruby/core/string/chomp_spec.rb new file mode 100644 index 0000000000..5daa8c5a40 --- /dev/null +++ b/spec/ruby/core/string/chomp_spec.rb @@ -0,0 +1,387 @@ +# -*- encoding: utf-8 -*- +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes.rb', __FILE__) + +describe "String#chomp" do + describe "when passed no argument" do + before do + # Ensure that $/ is set to the default value + @dollar_slash, $/ = $/, "\n" + end + + after do + $/ = @dollar_slash + end + + it "does not modify a String with no trailing carriage return or newline" do + "abc".chomp.should == "abc" + end + + it "returns a copy of the String when it is not modified" do + str = "abc" + str.chomp.should_not equal(str) + end + + it "removes one trailing newline" do + "abc\n\n".chomp.should == "abc\n" + end + + it "removes one trailing carriage return" do + "abc\r\r".chomp.should == "abc\r" + end + + it "removes one trailing carrige return, newline pair" do + "abc\r\n\r\n".chomp.should == "abc\r\n" + end + + it "returns an empty String when self is empty" do + "".chomp.should == "" + end + + it "taints the result if self is tainted" do + "abc".taint.chomp.tainted?.should be_true + end + + it "returns subclass instances when called on a subclass" do + str = StringSpecs::MyString.new("hello\n").chomp + str.should be_an_instance_of(StringSpecs::MyString) + end + + it "removes trailing characters that match $/ when it has been assigned a value" do + $/ = "cdef" + "abcdef".chomp.should == "ab" + end + end + + describe "when passed nil" do + it "does not modify the String" do + "abc\r\n".chomp(nil).should == "abc\r\n" + end + + it "returns a copy of the String" do + str = "abc" + str.chomp(nil).should_not equal(str) + end + + it "taints the result if self is tainted" do + "abc".taint.chomp(nil).tainted?.should be_true + end + + it "returns an empty String when self is empty" do + "".chomp(nil).should == "" + end + end + + describe "when passed ''" do + it "removes a final newline" do + "abc\n".chomp("").should == "abc" + end + + it "removes a final carriage return, newline" do + "abc\r\n".chomp("").should == "abc" + end + + it "does not remove a final carriage return" do + "abc\r".chomp("").should == "abc\r" + end + + it "removes more than one trailing newlines" do + "abc\n\n\n".chomp("").should == "abc" + end + + it "removes more than one trailing carriage return, newline pairs" do + "abc\r\n\r\n\r\n".chomp("").should == "abc" + end + + it "taints the result if self is tainted" do + "abc".taint.chomp("").tainted?.should be_true + end + + it "returns an empty String when self is empty" do + "".chomp("").should == "" + end + end + + describe "when passed '\\n'" do + it "removes one trailing newline" do + "abc\n\n".chomp("\n").should == "abc\n" + end + + it "removes one trailing carriage return" do + "abc\r\r".chomp("\n").should == "abc\r" + end + + it "removes one trailing carrige return, newline pair" do + "abc\r\n\r\n".chomp("\n").should == "abc\r\n" + end + + it "taints the result if self is tainted" do + "abc".taint.chomp("\n").tainted?.should be_true + end + + it "returns an empty String when self is empty" do + "".chomp("\n").should == "" + end + end + + describe "when passed an Object" do + it "calls #to_str to convert to a String" do + arg = mock("string chomp") + arg.should_receive(:to_str).and_return("bc") + "abc".chomp(arg).should == "a" + end + + it "raises a TypeError if #to_str does not return a String" do + arg = mock("string chomp") + arg.should_receive(:to_str).and_return(1) + lambda { "abc".chomp(arg) }.should raise_error(TypeError) + end + end + + describe "when passed a String" do + it "removes the trailing characters if they match the argument" do + "abcabc".chomp("abc").should == "abc" + end + + it "does not modify the String if the argument does not match the trailing characters" do + "abc".chomp("def").should == "abc" + end + + it "returns an empty String when self is empty" do + "".chomp("abc").should == "" + end + + it "taints the result if self is tainted" do + "abc".taint.chomp("abc").tainted?.should be_true + end + + it "does not taint the result when the argument is tainted" do + "abc".chomp("abc".taint).tainted?.should be_false + end + end +end + +describe "String#chomp!" do + describe "when passed no argument" do + before do + # Ensure that $/ is set to the default value + @dollar_slash, $/ = $/, "\n" + end + + after do + $/ = @dollar_slash + end + + it "modifies self" do + str = "abc\n" + str.chomp!.should equal(str) + end + + it "returns nil if self is not modified" do + "abc".chomp!.should be_nil + end + + it "removes one trailing newline" do + "abc\n\n".chomp!.should == "abc\n" + end + + it "removes one trailing carriage return" do + "abc\r\r".chomp!.should == "abc\r" + end + + it "removes one trailing carrige return, newline pair" do + "abc\r\n\r\n".chomp!.should == "abc\r\n" + end + + it "returns nil when self is empty" do + "".chomp!.should be_nil + end + + it "taints the result if self is tainted" do + "abc\n".taint.chomp!.tainted?.should be_true + end + + it "returns subclass instances when called on a subclass" do + str = StringSpecs::MyString.new("hello\n").chomp! + str.should be_an_instance_of(StringSpecs::MyString) + end + + it "removes trailing characters that match $/ when it has been assigned a value" do + $/ = "cdef" + "abcdef".chomp!.should == "ab" + end + end + + describe "when passed nil" do + it "returns nil" do + "abc\r\n".chomp!(nil).should be_nil + end + + it "returns nil when self is empty" do + "".chomp!(nil).should be_nil + end + end + + describe "when passed ''" do + it "removes a final newline" do + "abc\n".chomp!("").should == "abc" + end + + it "removes a final carriage return, newline" do + "abc\r\n".chomp!("").should == "abc" + end + + it "does not remove a final carriage return" do + "abc\r".chomp!("").should be_nil + end + + it "removes more than one trailing newlines" do + "abc\n\n\n".chomp!("").should == "abc" + end + + it "removes more than one trailing carriage return, newline pairs" do + "abc\r\n\r\n\r\n".chomp!("").should == "abc" + end + + it "taints the result if self is tainted" do + "abc\n".taint.chomp!("").tainted?.should be_true + end + + it "returns nil when self is empty" do + "".chomp!("").should be_nil + end + end + + describe "when passed '\\n'" do + it "removes one trailing newline" do + "abc\n\n".chomp!("\n").should == "abc\n" + end + + it "removes one trailing carriage return" do + "abc\r\r".chomp!("\n").should == "abc\r" + end + + it "removes one trailing carrige return, newline pair" do + "abc\r\n\r\n".chomp!("\n").should == "abc\r\n" + end + + it "taints the result if self is tainted" do + "abc\n".taint.chomp!("\n").tainted?.should be_true + end + + it "returns nil when self is empty" do + "".chomp!("\n").should be_nil + end + end + + describe "when passed an Object" do + it "calls #to_str to convert to a String" do + arg = mock("string chomp") + arg.should_receive(:to_str).and_return("bc") + "abc".chomp!(arg).should == "a" + end + + it "raises a TypeError if #to_str does not return a String" do + arg = mock("string chomp") + arg.should_receive(:to_str).and_return(1) + lambda { "abc".chomp!(arg) }.should raise_error(TypeError) + end + end + + describe "when passed a String" do + it "removes the trailing characters if they match the argument" do + "abcabc".chomp!("abc").should == "abc" + end + + it "returns nil if the argument does not match the trailing characters" do + "abc".chomp!("def").should be_nil + end + + it "returns nil when self is empty" do + "".chomp!("abc").should be_nil + end + + it "taints the result if self is tainted" do + "abc".taint.chomp!("abc").tainted?.should be_true + end + + it "does not taint the result when the argument is tainted" do + "abc".chomp!("abc".taint).tainted?.should be_false + end + end + + it "raises a RuntimeError on a frozen instance when it is modified" do + a = "string\n\r" + a.freeze + + lambda { a.chomp! }.should raise_error(RuntimeError) + end + + # see [ruby-core:23666] + it "raises a RuntimeError on a frozen instance when it would not be modified" do + a = "string\n\r" + a.freeze + lambda { a.chomp!(nil) }.should raise_error(RuntimeError) + lambda { a.chomp!("x") }.should raise_error(RuntimeError) + end +end + +with_feature :encoding do + describe "String#chomp" do + before :each do + @before_separator = $/ + end + + after :each do + $/ = @before_separator + end + + it "does not modify a multi-byte character" do + "あれ".chomp.should == "あれ" + end + + it "removes the final carriage return, newline from a multibyte String" do + "あれ\r\n".chomp.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.chomp.should == "abc".encode("utf-32be") + end + + it "removes the final carriage return, newline from a non-ASCII String when the record separator is changed" do + $/ = "\n".encode("utf-8") + str = "abc\r\n".encode "utf-32be" + str.chomp.should == "abc".encode("utf-32be") + end + end + + describe "String#chomp!" do + before :each do + @before_separator = $/ + end + + after :each do + $/ = @before_separator + end + + it "returns nil when the String is not modified" do + "あれ".chomp!.should be_nil + end + + it "removes the final carriage return, newline from a multibyte String" do + "あれ\r\n".chomp!.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.chomp!.should == "abc".encode("utf-32be") + end + + it "removes the final carriage return, newline from a non-ASCII String when the record separator is changed" do + $/ = "\n".encode("utf-8") + str = "abc\r\n".encode "utf-32be" + str.chomp!.should == "abc".encode("utf-32be") + end + end +end |