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-rw-r--r--spec/ruby/core/io/gets_spec.rb348
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diff --git a/spec/ruby/core/io/gets_spec.rb b/spec/ruby/core/io/gets_spec.rb
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+# -*- encoding: utf-8 -*-
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+require_relative 'shared/gets_ascii'
+
+describe "IO#gets" do
+ it_behaves_like :io_gets_ascii, :gets
+end
+
+describe "IO#gets" do
+ before :each do
+ @io = IOSpecs.io_fixture "lines.txt"
+ @count = 0
+ end
+
+ after :each do
+ @io.close if @io
+ end
+
+ it "assigns the returned line to $_" do
+ IOSpecs.lines.each do |line|
+ @io.gets
+ $_.should == line
+ end
+ end
+
+ it "sets $_ to nil after the last line has been read" do
+ while @io.gets
+ end
+ $_.should == nil
+ end
+
+ it "returns nil if called at the end of the stream" do
+ IOSpecs.lines.length.times { @io.gets }
+ @io.gets.should == nil
+ end
+
+ it "raises IOError on closed stream" do
+ -> { IOSpecs.closed_io.gets }.should.raise(IOError)
+ end
+
+ describe "with no separator" do
+ it "returns the next line of string that is separated by $/" do
+ IOSpecs.lines.each { |line| line.should == @io.gets }
+ end
+
+ it "updates lineno with each invocation" do
+ while @io.gets
+ @io.lineno.should == @count += 1
+ end
+ end
+
+ it "updates $. with each invocation" do
+ while @io.gets
+ $..should == @count += 1
+ end
+ end
+ end
+
+ describe "with nil separator" do
+ it "returns the entire contents" do
+ @io.gets(nil).should == IOSpecs.lines.join("")
+ end
+
+ it "updates lineno with each invocation" do
+ while @io.gets(nil)
+ @io.lineno.should == @count += 1
+ end
+ end
+
+ it "updates $. with each invocation" do
+ while @io.gets(nil)
+ $..should == @count += 1
+ end
+ end
+ end
+
+ describe "with an empty String separator" do
+ # Two successive newlines in the input separate paragraphs.
+ # When there are more than two successive newlines, only two are kept.
+ it "returns the next paragraph" do
+ @io.gets("").should == IOSpecs.lines[0,3].join("")
+ @io.gets("").should == IOSpecs.lines[4,3].join("")
+ @io.gets("").should == IOSpecs.lines[7,2].join("")
+ end
+
+ it "reads until the beginning of the next paragraph" do
+ # There are three newlines between the first and second paragraph
+ @io.gets("")
+ @io.gets.should == IOSpecs.lines[4]
+ end
+
+ it "updates lineno with each invocation" do
+ while @io.gets("")
+ @io.lineno.should == @count += 1
+ end
+ end
+
+ it "updates $. with each invocation" do
+ while @io.gets("")
+ $..should == @count += 1
+ end
+ end
+ end
+
+ describe "with an arbitrary String separator" do
+ it "reads up to and including the separator" do
+ @io.gets("la linea").should == "Voici la ligne une.\nQui \303\250 la linea"
+ end
+
+ it "updates lineno with each invocation" do
+ while (@io.gets("la"))
+ @io.lineno.should == @count += 1
+ end
+ end
+
+ it "updates $. with each invocation" do
+ while @io.gets("la")
+ $..should == @count += 1
+ end
+ end
+
+ describe "that consists of multiple bytes" do
+ platform_is_not :windows do
+ it "should match the separator even if the buffer is filled over successive reads" do
+ IO.pipe do |read, write|
+
+ # Write part of the string with the separator split between two write calls. We want
+ # the read to intertwine such that when the read starts the full data isn't yet
+ # available in the buffer.
+ write.write("Aquí está la línea tres\r\n")
+
+ t = Thread.new do
+ # Continue reading until the separator is encountered or the pipe is closed.
+ read.gets("\r\n\r\n")
+ end
+
+ # Write the other half of the separator, which should cause the `gets` call to now
+ # match. Explicitly close the pipe for good measure so a bug in `gets` doesn't block forever.
+ Thread.pass until t.stop?
+
+ write.write("\r\nelse\r\n\r\n")
+ write.close
+
+ t.value.bytes.should == "Aquí está la línea tres\r\n\r\n".bytes
+ read.read(8).bytes.should == "else\r\n\r\n".bytes
+ end
+ end
+ end
+ end
+ end
+
+ describe "when passed chomp" do
+ it "returns the first line without a trailing newline character" do
+ @io.gets(chomp: true).should == IOSpecs.lines_without_newline_characters[0]
+ end
+
+ it "raises exception when options passed as Hash" do
+ -> { @io.gets({ chomp: true }) }.should.raise(TypeError)
+
+ -> {
+ @io.gets("\n", 1, { chomp: true })
+ }.should.raise(ArgumentError, "wrong number of arguments (given 3, expected 0..2)")
+ end
+ end
+end
+
+describe "IO#gets" do
+ before :each do
+ @name = tmp("io_gets")
+ end
+
+ after :each do
+ rm_r @name
+ end
+
+ it "raises an IOError if the stream is opened for append only" do
+ -> { File.open(@name, "a:utf-8") { |f| f.gets } }.should.raise(IOError)
+ end
+
+ it "raises an IOError if the stream is opened for writing only" do
+ -> { File.open(@name, "w:utf-8") { |f| f.gets } }.should.raise(IOError)
+ end
+end
+
+describe "IO#gets" do
+ before :each do
+ @name = tmp("io_gets")
+ touch(@name) { |f| f.write "one\n\ntwo\n\nthree\nfour\n" }
+ @io = new_io @name, "r:utf-8"
+ end
+
+ after :each do
+ @io.close if @io
+ rm_r @name
+ end
+
+ it "calls #to_int to convert a single object argument to an Integer limit" do
+ obj = mock("io gets limit")
+ obj.should_receive(:to_int).and_return(6)
+
+ @io.gets(obj).should == "one\n"
+ end
+
+ it "calls #to_int to convert the second object argument to an Integer limit" do
+ obj = mock("io gets limit")
+ obj.should_receive(:to_int).and_return(2)
+
+ @io.gets(nil, obj).should == "on"
+ end
+
+ it "calls #to_str to convert the first argument to a String when passed a limit" do
+ obj = mock("io gets separator")
+ obj.should_receive(:to_str).and_return($/)
+
+ @io.gets(obj, 5).should == "one\n"
+ end
+
+ it "reads to the default separator when passed a single argument greater than the number of bytes to the separator" do
+ @io.gets(6).should == "one\n"
+ end
+
+ it "reads limit bytes when passed a single argument less than the number of bytes to the default separator" do
+ @io.gets(3).should == "one"
+ end
+
+ it "reads limit bytes when passed nil and a limit" do
+ @io.gets(nil, 6).should == "one\n\nt"
+ end
+
+ it "reads all bytes when the limit is higher than the available bytes" do
+ @io.gets(nil, 100).should == "one\n\ntwo\n\nthree\nfour\n"
+ end
+
+ it "reads until the next paragraph when passed '' and a limit greater than the next paragraph" do
+ @io.gets("", 6).should == "one\n\n"
+ end
+
+ it "reads limit bytes when passed '' and a limit less than the next paragraph" do
+ @io.gets("", 3).should == "one"
+ end
+
+ it "reads all bytes when pass a separator and reading more than all bytes" do
+ @io.gets("\t", 100).should == "one\n\ntwo\n\nthree\nfour\n"
+ end
+
+ it "returns empty string when 0 passed as a limit" do
+ @io.gets(0).should == ""
+ @io.gets(nil, 0).should == ""
+ @io.gets("", 0).should == ""
+ end
+
+ it "does not accept limit that doesn't fit in a C off_t" do
+ -> { @io.gets(2**128) }.should.raise(RangeError)
+ end
+end
+
+describe "IO#gets" do
+ before :each do
+ @name = tmp("io_gets")
+ # create data "朝日" + "\xE3\x81" * 100 to avoid utf-8 conflicts
+ data = "朝日" + ([227,129].pack('C*') * 100).force_encoding('utf-8')
+ touch(@name) { |f| f.write data }
+ @io = new_io @name, "r:utf-8"
+ end
+
+ after :each do
+ @io.close if @io
+ rm_r @name
+ end
+
+ it "reads limit bytes and extra bytes when limit is reached not at character boundary" do
+ [@io.gets(1), @io.gets(1)].should == ["朝", "日"]
+ end
+
+ it "read limit bytes and extra bytes with maximum of 16" do
+ # create str "朝日\xE3" + "\x81\xE3" * 8 to avoid utf-8 conflicts
+ str = "朝日" + ([227] + [129,227] * 8).pack('C*').force_encoding('utf-8')
+ @io.gets(7).should == str
+ end
+end
+
+describe "IO#gets" do
+ before :each do
+ @external = Encoding.default_external
+ @internal = Encoding.default_internal
+
+ Encoding.default_external = Encoding::UTF_8
+ Encoding.default_internal = nil
+
+ @name = tmp("io_gets")
+ touch(@name) { |f| f.write "line" }
+ end
+
+ after :each do
+ @io.close if @io
+ rm_r @name
+ Encoding.default_external = @external
+ Encoding.default_internal = @internal
+ end
+
+ it "uses the default external encoding" do
+ @io = new_io @name, 'r'
+ @io.gets.encoding.should == Encoding::UTF_8
+ end
+
+ it "uses the IO object's external encoding, when set" do
+ @io = new_io @name, 'r'
+ @io.set_encoding Encoding::US_ASCII
+ @io.gets.encoding.should == Encoding::US_ASCII
+ end
+
+ it "transcodes into the default internal encoding" do
+ Encoding.default_internal = Encoding::US_ASCII
+ @io = new_io @name, 'r'
+ @io.gets.encoding.should == Encoding::US_ASCII
+ end
+
+ it "transcodes into the IO object's internal encoding, when set" do
+ Encoding.default_internal = Encoding::US_ASCII
+ @io = new_io @name, 'r'
+ @io.set_encoding Encoding::UTF_8, Encoding::UTF_16
+ @io.gets.encoding.should == Encoding::UTF_16
+ end
+
+ it "overwrites the default external encoding with the IO object's own external encoding" do
+ Encoding.default_external = Encoding::BINARY
+ Encoding.default_internal = Encoding::UTF_8
+ @io = new_io @name, 'r'
+ @io.set_encoding Encoding::IBM866
+ @io.gets.encoding.should == Encoding::UTF_8
+ end
+
+ it "ignores the internal encoding if the default external encoding is BINARY" do
+ Encoding.default_external = Encoding::BINARY
+ Encoding.default_internal = Encoding::UTF_8
+ @io = new_io @name, 'r'
+ @io.gets.encoding.should == Encoding::BINARY
+ end
+
+ it "ignores the internal encoding if the IO object's external encoding is BINARY" do
+ Encoding.default_external = Encoding::BINARY
+ Encoding.default_internal = Encoding::UTF_8
+ @io = new_io @name, 'r'
+ @io.set_encoding Encoding::BINARY, Encoding::UTF_8
+ @io.gets.encoding.should == Encoding::BINARY
+ end
+end
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