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Diffstat (limited to 'spec/rubyspec/language/predefined_spec.rb')
| -rw-r--r-- | spec/rubyspec/language/predefined_spec.rb | 1221 |
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diff --git a/spec/rubyspec/language/predefined_spec.rb b/spec/rubyspec/language/predefined_spec.rb deleted file mode 100644 index a0930eb214..0000000000 --- a/spec/rubyspec/language/predefined_spec.rb +++ /dev/null @@ -1,1221 +0,0 @@ -require File.expand_path('../../spec_helper', __FILE__) -require 'stringio' - -# The following tables are excerpted from Programming Ruby: The Pragmatic Programmer's Guide' -# Second Edition by Dave Thomas, Chad Fowler, and Andy Hunt, page 319-22. -# -# Entries marked [r/o] are read-only and an error will be raised of the program attempts to -# modify them. Entries marked [thread] are thread local. - -=begin -Exception Information ---------------------------------------------------------------------------------------------------- - -$! Exception The exception object passed to raise. [thread] -$@ Array The stack backtrace generated by the last exception. [thread] -=end - -=begin -Pattern Matching Variables ---------------------------------------------------------------------------------------------------- - -These variables are set to nil after an unsuccessful pattern match. - -$& String The string matched (following a successful pattern match). This variable is - local to the current scope. [r/o, thread] -$+ String The contents of the highest-numbered group matched following a successful - pattern match. Thus, in "cat" =~/(c|a)(t|z)/, $+ will be set to “t”. This - variable is local to the current scope. [r/o, thread] -$` String The string preceding the match in a successful pattern match. This variable - is local to the current scope. [r/o, thread] -$' String The string following the match in a successful pattern match. This variable - is local to the current scope. [r/o, thread] -$1 to $9 String The contents of successive groups matched in a successful pattern match. In - "cat" =~/(c|a)(t|z)/, $1 will be set to “a” and $2 to “t”. This variable - is local to the current scope. [r/o, thread] -$~ MatchData An object that encapsulates the results of a successful pattern match. The - variables $&, $`, $', and $1 to $9 are all derived from $~. Assigning to $~ - changes the values of these derived variables. This variable is local to the - current scope. [thread] -=end - - -describe "Predefined global $~" do - it "is set to contain the MatchData object of the last match if successful" do - md = /foo/.match 'foo' - $~.should be_kind_of(MatchData) - $~.object_id.should == md.object_id - - /bar/ =~ 'bar' - $~.should be_kind_of(MatchData) - $~.object_id.should_not == md.object_id - end - - it "is set to nil if the last match was unsuccessful" do - /foo/ =~ 'foo' - $~.nil?.should == false - - /foo/ =~ 'bar' - $~.nil?.should == true - end - - it "is set at the method-scoped level rather than block-scoped" do - obj = Object.new - def obj.foo; yield; end - def obj.foo2(&proc); proc.call; end - - match2 = nil - match3 = nil - match4 = nil - - match1 = /foo/.match "foo" - - obj.foo { match2 = /bar/.match("bar") } - - match2.should_not == nil - $~.should == match2 - - eval 'match3 = /baz/.match("baz")' - - match3.should_not == nil - $~.should == match3 - - obj.foo2 { match4 = /qux/.match("qux") } - - match4.should_not == nil - $~.should == match4 - end - - it "raises an error if assigned an object not nil or instanceof MatchData" do - $~ = nil - $~.should == nil - $~ = /foo/.match("foo") - $~.should be_an_instance_of(MatchData) - - lambda { $~ = Object.new }.should raise_error(TypeError) - lambda { $~ = 1 }.should raise_error(TypeError) - end - - it "changes the value of derived capture globals when assigned" do - "foo" =~ /(f)oo/ - foo_match = $~ - "bar" =~ /(b)ar/ - $~ = foo_match - $1.should == "f" - end - - it "changes the value of the derived preceding match global" do - "foo hello" =~ /hello/ - foo_match = $~ - "bar" =~ /(bar)/ - $~ = foo_match - $`.should == "foo " - end - - it "changes the value of the derived following match global" do - "foo hello" =~ /foo/ - foo_match = $~ - "bar" =~ /(bar)/ - $~ = foo_match - $'.should == " hello" - end - - it "changes the value of the derived full match global" do - "foo hello" =~ /foo/ - foo_match = $~ - "bar" =~ /(bar)/ - $~ = foo_match - $&.should == "foo" - end -end - -describe "Predefined global $&" do - it "is equivalent to MatchData#[0] on the last match $~" do - /foo/ =~ 'barfoobaz' - $&.should == $~[0] - $&.should == 'foo' - end - - with_feature :encoding do - it "sets the encoding to the encoding of the source String" do - "abc".force_encoding(Encoding::EUC_JP) =~ /b/ - $&.encoding.should equal(Encoding::EUC_JP) - end - end -end - -describe "Predefined global $`" do - it "is equivalent to MatchData#pre_match on the last match $~" do - /foo/ =~ 'barfoobaz' - $`.should == $~.pre_match - $`.should == 'bar' - end - - with_feature :encoding do - it "sets the encoding to the encoding of the source String" do - "abc".force_encoding(Encoding::EUC_JP) =~ /b/ - $`.encoding.should equal(Encoding::EUC_JP) - end - - it "sets an empty result to the encoding of the source String" do - "abc".force_encoding(Encoding::ISO_8859_1) =~ /a/ - $`.encoding.should equal(Encoding::ISO_8859_1) - end - end -end - -describe "Predefined global $'" do - it "is equivalent to MatchData#post_match on the last match $~" do - /foo/ =~ 'barfoobaz' - $'.should == $~.post_match - $'.should == 'baz' - end - - with_feature :encoding do - it "sets the encoding to the encoding of the source String" do - "abc".force_encoding(Encoding::EUC_JP) =~ /b/ - $'.encoding.should equal(Encoding::EUC_JP) - end - - it "sets an empty result to the encoding of the source String" do - "abc".force_encoding(Encoding::ISO_8859_1) =~ /c/ - $'.encoding.should equal(Encoding::ISO_8859_1) - end - end -end - -describe "Predefined global $+" do - it "is equivalent to $~.captures.last" do - /(f(o)o)/ =~ 'barfoobaz' - $+.should == $~.captures.last - $+.should == 'o' - end - - it "captures the last non nil capture" do - /(a)|(b)/ =~ 'a' - $+.should == 'a' - end - - with_feature :encoding do - it "sets the encoding to the encoding of the source String" do - "abc".force_encoding(Encoding::EUC_JP) =~ /(b)/ - $+.encoding.should equal(Encoding::EUC_JP) - end - end -end - -describe "Predefined globals $1..N" do - it "are equivalent to $~[N]" do - /(f)(o)(o)/ =~ 'foo' - $1.should == $~[1] - $2.should == $~[2] - $3.should == $~[3] - $4.should == $~[4] - - [$1, $2, $3, $4].should == ['f', 'o', 'o', nil] - end - - it "are nil unless a match group occurs" do - def test(arg) - case arg - when /-(.)?/ - $1 - end - end - test("-").should == nil - end - - with_feature :encoding do - it "sets the encoding to the encoding of the source String" do - "abc".force_encoding(Encoding::EUC_JP) =~ /(b)/ - $1.encoding.should equal(Encoding::EUC_JP) - end - end -end - -describe "Predefined global $stdout" do - before :each do - @old_stdout = $stdout - end - - after :each do - $stdout = @old_stdout - end - - it "raises TypeError error if assigned to nil" do - lambda { $stdout = nil }.should raise_error(TypeError) - end - - it "raises TypeError error if assigned to object that doesn't respond to #write" do - obj = mock('object') - lambda { $stdout = obj }.should raise_error(TypeError) - - obj.stub!(:write) - $stdout = obj - $stdout.should equal(obj) - end -end - -describe "Predefined global $!" do - # See http://jira.codehaus.org/browse/JRUBY-5550 - it "remains nil after a failed core class \"checked\" coercion against a class that defines method_missing" do - $!.should == nil - - obj = Class.new do - def method_missing(*args) - super - end - end.new - - [obj, 'foo'].join - - $!.should == nil - end - - it "should be set to the value of $! before the begin after a successful rescue" do - outer = StandardError.new 'outer' - inner = StandardError.new 'inner' - - begin - raise outer - rescue - $!.should == outer - - # nested rescue - begin - $!.should == outer - raise inner - rescue - $!.should == inner - ensure - $!.should == outer - end - $!.should == outer - end - $!.should == nil - end - - it "should be set to the value of $! before the begin after a rescue which returns" do - def foo - outer = StandardError.new 'outer' - inner = StandardError.new 'inner' - - begin - raise outer - rescue - $!.should == outer - - # nested rescue - begin - $!.should == outer - raise inner - rescue - $!.should == inner - return - ensure - $!.should == outer - end - $!.should == outer - end - $!.should == nil - end - foo - end - - it "should be set to the value of $! before the begin after a successful rescue within an ensure" do - outer = StandardError.new 'outer' - inner = StandardError.new 'inner' - - begin - begin - raise outer - ensure - $!.should == outer - - # nested rescue - begin - $!.should == outer - raise inner - rescue - $!.should == inner - ensure - $!.should == outer - end - $!.should == outer - end - flunk "outer should be raised after the ensure" - rescue - $!.should == outer - end - $!.should == nil - end - - it "should be set to the new exception after a throwing rescue" do - outer = StandardError.new 'outer' - inner = StandardError.new 'inner' - - begin - raise outer - rescue - $!.should == outer - - begin - # nested rescue - begin - $!.should == outer - raise inner - rescue # the throwing rescue - $!.should == inner - raise inner - ensure - $!.should == inner - end - rescue # do not make the exception fail the example - $!.should == inner - end - $!.should == outer - end - $!.should == nil - end - - describe "in bodies without ensure" do - it "should be cleared when an exception is rescued" do - e = StandardError.new 'foo' - begin - raise e - rescue - $!.should == e - end - $!.should == nil - end - - it "should be cleared when an exception is rescued even when a non-local return is present" do - def foo(e) - $!.should == e - yield - end - def bar - e = StandardError.new 'foo' - begin - raise e - rescue - $!.should == e - foo(e) { return } - end - end - - bar - $!.should == nil - end - - it "should not be cleared when an exception is not rescued" do - e = StandardError.new - begin - begin - begin - raise e - rescue TypeError - flunk - end - ensure - $!.should == e - end - rescue - $!.should == e - end - $!.should == nil - end - - it "should not be cleared when an exception is rescued and rethrown" do - e = StandardError.new 'foo' - begin - begin - begin - raise e - rescue => e - $!.should == e - raise e - end - ensure - $!.should == e - end - rescue - $!.should == e - end - $!.should == nil - end - end - - describe "in ensure-protected bodies" do - it "should be cleared when an exception is rescued" do - e = StandardError.new 'foo' - begin - raise e - rescue - $!.should == e - ensure - $!.should == nil - end - $!.should == nil - end - - it "should not be cleared when an exception is not rescued" do - e = StandardError.new - begin - begin - begin - raise e - rescue TypeError - flunk - ensure - $!.should == e - end - ensure - $!.should == e - end - rescue - $!.should == e - end - end - - it "should not be cleared when an exception is rescued and rethrown" do - e = StandardError.new - begin - begin - begin - raise e - rescue => e - $!.should == e - raise e - ensure - $!.should == e - end - ensure - $!.should == e - end - rescue - $!.should == e - end - end - end -end - -=begin -Input/Output Variables ---------------------------------------------------------------------------------------------------- - -$/ String The input record separator (newline by default). This is the value that rou- - tines such as Kernel#gets use to determine record boundaries. If set to - nil, gets will read the entire file. -$-0 String Synonym for $/. -$\ String The string appended to the output of every call to methods such as - Kernel#print and IO#write. The default value is nil. -$, String The separator string output between the parameters to methods such as - Kernel#print and Array#join. Defaults to nil, which adds no text. -$. Fixnum The number of the last line read from the current input file. -$; String The default separator pattern used by String#split. May be set from the - command line using the -F flag. -$< Object An object that provides access to the concatenation of the contents of all - the files given as command-line arguments or $stdin (in the case where - there are no arguments). $< supports methods similar to a File object: - binmode, close, closed?, each, each_byte, each_line, eof, eof?, - file, filename, fileno, getc, gets, lineno, lineno=, path, pos, pos=, - read, readchar, readline, readlines, rewind, seek, skip, tell, to_a, - to_i, to_io, to_s, along with the methods in Enumerable. The method - file returns a File object for the file currently being read. This may change - as $< reads through the files on the command line. [r/o] -$> IO The destination of output for Kernel#print and Kernel#printf. The - default value is $stdout. -$_ String The last line read by Kernel#gets or Kernel#readline. Many string- - related functions in the Kernel module operate on $_ by default. The vari- - able is local to the current scope. [thread] -$-F String Synonym for $;. -$stderr IO The current standard error output. -$stdin IO The current standard input. -$stdout IO The current standard output. Assignment to $stdout is deprecated: use - $stdout.reopen instead. -=end - -describe "Predefined global $/" do - before :each do - @dollar_slash = $/ - @dollar_dash_zero = $-0 - end - - after :each do - $/ = @dollar_slash - $-0 = @dollar_dash_zero - end - - it "can be assigned a String" do - str = "abc" - $/ = str - $/.should equal(str) - end - - it "can be assigned nil" do - $/ = nil - $/.should be_nil - end - - it "returns the value assigned" do - ($/ = "xyz").should == "xyz" - end - - - it "changes $-0" do - $/ = "xyz" - $-0.should equal($/) - end - - it "does not call #to_str to convert the object to a String" do - obj = mock("$/ value") - obj.should_not_receive(:to_str) - - lambda { $/ = obj }.should raise_error(TypeError) - end - - it "raises a TypeError if assigned a Fixnum" do - lambda { $/ = 1 }.should raise_error(TypeError) - end - - it "raises a TypeError if assigned a boolean" do - lambda { $/ = true }.should raise_error(TypeError) - end -end - -describe "Predefined global $-0" do - before :each do - @dollar_slash = $/ - @dollar_dash_zero = $-0 - end - - after :each do - $/ = @dollar_slash - $-0 = @dollar_dash_zero - end - - it "can be assigned a String" do - str = "abc" - $-0 = str - $-0.should equal(str) - end - - it "can be assigned nil" do - $-0 = nil - $-0.should be_nil - end - - it "returns the value assigned" do - ($-0 = "xyz").should == "xyz" - end - - it "changes $/" do - $-0 = "xyz" - $/.should equal($-0) - end - - it "does not call #to_str to convert the object to a String" do - obj = mock("$-0 value") - obj.should_not_receive(:to_str) - - lambda { $-0 = obj }.should raise_error(TypeError) - end - - it "raises a TypeError if assigned a Fixnum" do - lambda { $-0 = 1 }.should raise_error(TypeError) - end - - it "raises a TypeError if assigned a boolean" do - lambda { $-0 = true }.should raise_error(TypeError) - end -end - -describe "Predefined global $," do - after :each do - $, = nil - end - - it "defaults to nil" do - $,.should be_nil - end - - it "raises TypeError if assigned a non-String" do - lambda { $, = Object.new }.should raise_error(TypeError) - end -end - -describe "Predefined global $_" do - it "is set to the last line read by e.g. StringIO#gets" do - stdin = StringIO.new("foo\nbar\n", "r") - - read = stdin.gets - read.should == "foo\n" - $_.should == read - - read = stdin.gets - read.should == "bar\n" - $_.should == read - - read = stdin.gets - read.should == nil - $_.should == read - end - - it "is set at the method-scoped level rather than block-scoped" do - obj = Object.new - def obj.foo; yield; end - def obj.foo2; yield; end - - stdin = StringIO.new("foo\nbar\nbaz\nqux\n", "r") - match = stdin.gets - - obj.foo { match = stdin.gets } - - match.should == "bar\n" - $_.should == match - - eval 'match = stdin.gets' - - match.should == "baz\n" - $_.should == match - - obj.foo2 { match = stdin.gets } - - match.should == "qux\n" - $_.should == match - end - - it "is Thread-local" do - $_ = nil - running = false - - thr = Thread.new do - $_ = "last line" - running = true - end - - Thread.pass until running - $_.should be_nil - - thr.join - end - - it "can be assigned any value" do - $_ = nil - $_.should == nil - $_ = "foo" - $_.should == "foo" - o = Object.new - $_ = o - $_.should == o - $_ = 1 - $_.should == 1 - end -end - -=begin -Execution Environment Variables ---------------------------------------------------------------------------------------------------- - -$0 String The name of the top-level Ruby program being executed. Typically this will - be the program’s filename. On some operating systems, assigning to this - variable will change the name of the process reported (for example) by the - ps(1) command. -$* Array An array of strings containing the command-line options from the invoca- - tion of the program. Options used by the Ruby interpreter will have been - removed. [r/o] -$" Array An array containing the filenames of modules loaded by require. [r/o] -$$ Fixnum The process number of the program being executed. [r/o] -$? Process::Status The exit status of the last child process to terminate. [r/o, thread] -$: Array An array of strings, where each string specifies a directory to be searched for - Ruby scripts and binary extensions used by the load and require methods. - The initial value is the value of the arguments passed via the -I command- - line option, followed by an installation-defined standard library location, fol- - lowed by the current directory (“.”). This variable may be set from within a - program to alter the default search path; typically, programs use $: << dir - to append dir to the path. [r/o] -$-a Object True if the -a option is specified on the command line. [r/o] -$-d Object Synonym for $DEBUG. -$DEBUG Object Set to true if the -d command-line option is specified. -__FILE__ String The name of the current source file. [r/o] -$F Array The array that receives the split input line if the -a command-line option is - used. -$FILENAME String The name of the current input file. Equivalent to $<.filename. [r/o] -$-i String If in-place edit mode is enabled (perhaps using the -i command-line - option), $-i holds the extension used when creating the backup file. If you - set a value into $-i, enables in-place edit mode. -$-I Array Synonym for $:. [r/o] -$-K String Sets the multibyte coding system for strings and regular expressions. Equiv- - alent to the -K command-line option. -$-l Object Set to true if the -l option (which enables line-end processing) is present - on the command line. [r/o] -__LINE__ String The current line number in the source file. [r/o] -$LOAD_PATH Array A synonym for $:. [r/o] -$-p Object Set to true if the -p option (which puts an implicit while gets . . . end - loop around your program) is present on the command line. [r/o] -$SAFE Fixnum The current safe level. This variable’s value may never be - reduced by assignment. [thread] (Not implemented in Rubinius) -$VERBOSE Object Set to true if the -v, --version, -W, or -w option is specified on the com- - mand line. Set to false if no option, or -W1 is given. Set to nil if -W0 - was specified. Setting this option to true causes the interpreter and some - library routines to report additional information. Setting to nil suppresses - all warnings (including the output of Kernel.warn). -$-v Object Synonym for $VERBOSE. -$-w Object Synonym for $VERBOSE. -=end -describe "Execution variable $:" do - it "is initialized to an array of strings" do - $:.is_a?(Array).should == true - ($:.length > 0).should == true - end - - it "does not include the current directory" do - $:.should_not include(".") - end - - it "is the same object as $LOAD_PATH and $-I" do - $:.__id__.should == $LOAD_PATH.__id__ - $:.__id__.should == $-I.__id__ - end - - it "can be changed via <<" do - $: << "foo" - $:.should include("foo") - end - - it "is read-only" do - lambda { - $: = [] - }.should raise_error(NameError) - - lambda { - $LOAD_PATH = [] - }.should raise_error(NameError) - - lambda { - $-I = [] - }.should raise_error(NameError) - end -end - -describe "Global variable $\"" do - it "is an alias for $LOADED_FEATURES" do - $".object_id.should == $LOADED_FEATURES.object_id - end - - it "is read-only" do - lambda { - $" = [] - }.should raise_error(NameError) - - lambda { - $LOADED_FEATURES = [] - }.should raise_error(NameError) - end -end - -describe "Global variable $<" do - it "is read-only" do - lambda { - $< = nil - }.should raise_error(NameError) - end -end - -describe "Global variable $FILENAME" do - it "is read-only" do - lambda { - $FILENAME = "-" - }.should raise_error(NameError) - end -end - -describe "Global variable $?" do - it "is read-only" do - lambda { - $? = nil - }.should raise_error(NameError) - end - - it "is thread-local" do - system(ruby_cmd('exit 0')) - Thread.new { $?.should be_nil }.join - end -end - -describe "Global variable $-a" do - it "is read-only" do - lambda { $-a = true }.should raise_error(NameError) - end -end - -describe "Global variable $-l" do - it "is read-only" do - lambda { $-l = true }.should raise_error(NameError) - end -end - -describe "Global variable $-p" do - it "is read-only" do - lambda { $-p = true }.should raise_error(NameError) - end -end - -describe "Global variable $-d" do - before :each do - @debug = $DEBUG - end - - after :each do - $DEBUG = @debug - end - - it "is an alias of $DEBUG" do - $DEBUG = true - $-d.should be_true - $-d = false - $DEBUG.should be_false - end -end - -describe :verbose_global_alias, shared: true do - before :each do - @verbose = $VERBOSE - end - - after :each do - $VERBOSE = @verbose - end - - it "is an alias of $VERBOSE" do - $VERBOSE = true - eval(@method).should be_true - eval("#{@method} = false") - $VERBOSE.should be_false - end -end - -describe "Global variable $-v" do - it_behaves_like :verbose_global_alias, '$-v' -end - -describe "Global variable $-w" do - it_behaves_like :verbose_global_alias, '$-w' -end - -describe "Global variable $0" do - before :each do - @orig_program_name = $0 - end - - after :each do - $0 = @orig_program_name - end - - it "is the path given as the main script and the same as __FILE__" do - script = "fixtures/dollar_zero.rb" - Dir.chdir(File.dirname(__FILE__)) do - ruby_exe(script).should == "#{script}\n#{script}\nOK" - end - end - - it "returns the program name" do - $0 = "rbx" - $0.should == "rbx" - end - - platform_is :linux, :darwin do - it "actually sets the program name" do - title = "rubyspec-dollar0-test" - $0 = title - `ps -ocommand= -p#{$$}`.should include(title) - end - end - - it "returns the given value when set" do - ($0 = "rbx").should == "rbx" - end - - it "raises a TypeError when not given an object that can be coerced to a String" do - lambda { $0 = nil }.should raise_error(TypeError) - end -end - -=begin -Standard Objects ---------------------------------------------------------------------------------------------------- - -ARGF Object A synonym for $<. -ARGV Array A synonym for $*. -ENV Object A hash-like object containing the program’s environment variables. An - instance of class Object, ENV implements the full set of Hash methods. Used - to query and set the value of an environment variable, as in ENV["PATH"] - and ENV["term"]="ansi". -false FalseClass Singleton instance of class FalseClass. [r/o] -nil NilClass The singleton instance of class NilClass. The value of uninitialized - instance and global variables. [r/o] -self Object The receiver (object) of the current method. [r/o] -true TrueClass Singleton instance of class TrueClass. [r/o] -=end - -describe "The predefined standard objects" do - it "includes ARGF" do - Object.const_defined?(:ARGF).should == true - end - - it "includes ARGV" do - Object.const_defined?(:ARGV).should == true - end - - it "includes a hash-like object ENV" do - Object.const_defined?(:ENV).should == true - ENV.respond_to?(:[]).should == true - end -end - -describe "The predefined standard object nil" do - it "is an instance of NilClass" do - nil.should be_kind_of(NilClass) - end - - it "raises a SyntaxError if assigned to" do - lambda { eval("nil = true") }.should raise_error(SyntaxError) - end -end - -describe "The predefined standard object true" do - it "is an instance of TrueClass" do - true.should be_kind_of(TrueClass) - end - - it "raises a SyntaxError if assigned to" do - lambda { eval("true = false") }.should raise_error(SyntaxError) - end -end - -describe "The predefined standard object false" do - it "is an instance of FalseClass" do - false.should be_kind_of(FalseClass) - end - - it "raises a SyntaxError if assigned to" do - lambda { eval("false = nil") }.should raise_error(SyntaxError) - end -end - -describe "The self pseudo-variable" do - it "raises a SyntaxError if assigned to" do - lambda { eval("self = 1") }.should raise_error(SyntaxError) - end -end - -=begin -Global Constants ---------------------------------------------------------------------------------------------------- - -The following constants are defined by the Ruby interpreter. - -DATA IO If the main program file contains the directive __END__, then - the constant DATA will be initialized so that reading from it will - return lines following __END__ from the source file. -FALSE FalseClass Synonym for false. -NIL NilClass Synonym for nil. -RUBY_PLATFORM String The identifier of the platform running this program. This string - is in the same form as the platform identifier used by the GNU - configure utility (which is not a coincidence). -RUBY_RELEASE_DATE String The date of this release. -RUBY_VERSION String The version number of the interpreter. -STDERR IO The actual standard error stream for the program. The initial - value of $stderr. -STDIN IO The actual standard input stream for the program. The initial - value of $stdin. -STDOUT IO The actual standard output stream for the program. The initial - value of $stdout. -SCRIPT_LINES__ Hash If a constant SCRIPT_LINES__ is defined and references a Hash, - Ruby will store an entry containing the contents of each file it - parses, with the file’s name as the key and an array of strings as - the value. -TOPLEVEL_BINDING Binding A Binding object representing the binding at Ruby’s top level— - the level where programs are initially executed. -TRUE TrueClass Synonym for true. -=end - -describe "The predefined global constants" do - ruby_version_is ""..."2.4" do - it "includes TRUE" do - Object.const_defined?(:TRUE).should == true - TRUE.should equal(true) - end - - it "includes FALSE" do - Object.const_defined?(:FALSE).should == true - FALSE.should equal(false) - end - - it "includes NIL" do - Object.const_defined?(:NIL).should == true - NIL.should equal(nil) - end - end - - ruby_version_is "2.4" do - it "includes TRUE" do - Object.const_defined?(:TRUE).should == true - -> { - TRUE.should equal(true) - }.should complain(/constant ::TRUE is deprecated/) - end - - it "includes FALSE" do - Object.const_defined?(:FALSE).should == true - -> { - FALSE.should equal(false) - }.should complain(/constant ::FALSE is deprecated/) - end - - it "includes NIL" do - Object.const_defined?(:NIL).should == true - -> { - NIL.should equal(nil) - }.should complain(/constant ::NIL is deprecated/) - end - end - - it "includes STDIN" do - Object.const_defined?(:STDIN).should == true - end - - it "includes STDOUT" do - Object.const_defined?(:STDOUT).should == true - end - - it "includes STDERR" do - Object.const_defined?(:STDERR).should == true - end - - it "includes RUBY_VERSION" do - Object.const_defined?(:RUBY_VERSION).should == true - end - - it "includes RUBY_RELEASE_DATE" do - Object.const_defined?(:RUBY_RELEASE_DATE).should == true - end - - it "includes RUBY_PLATFORM" do - Object.const_defined?(:RUBY_PLATFORM).should == true - end - - it "includes TOPLEVEL_BINDING" do - Object.const_defined?(:TOPLEVEL_BINDING).should == true - end - -end - -with_feature :encoding do - describe "The predefined global constant" do - before :each do - @external = Encoding.default_external - @internal = Encoding.default_internal - end - - after :each do - Encoding.default_external = @external - Encoding.default_internal = @internal - end - - describe "STDIN" do - it "has the same external encoding as Encoding.default_external" do - STDIN.external_encoding.should equal(Encoding.default_external) - end - - it "has the same external encoding as Encoding.default_external when that encoding is changed" do - Encoding.default_external = Encoding::ISO_8859_16 - STDIN.external_encoding.should equal(Encoding::ISO_8859_16) - end - - it "has the encodings set by #set_encoding" do - code = "STDIN.set_encoding Encoding::IBM775, Encoding::IBM866; " \ - "p [STDIN.external_encoding.name, STDIN.internal_encoding.name]" - ruby_exe(code).chomp.should == %{["IBM775", "IBM866"]} - end - - it "retains the encoding set by #set_encoding when Encoding.default_external is changed" do - code = "STDIN.set_encoding Encoding::IBM775, Encoding::IBM866; " \ - "Encoding.default_external = Encoding::ISO_8859_16;" \ - "p [STDIN.external_encoding.name, STDIN.internal_encoding.name]" - ruby_exe(code).chomp.should == %{["IBM775", "IBM866"]} - end - - it "has nil for the internal encoding" do - STDIN.internal_encoding.should be_nil - end - - it "has nil for the internal encoding despite Encoding.default_internal being changed" do - Encoding.default_internal = Encoding::IBM437 - STDIN.internal_encoding.should be_nil - end - end - - describe "STDOUT" do - it "has nil for the external encoding" do - STDOUT.external_encoding.should be_nil - end - - it "has nil for the external encoding despite Encoding.default_external being changed" do - Encoding.default_external = Encoding::ISO_8859_1 - STDOUT.external_encoding.should be_nil - end - - it "has the encodings set by #set_encoding" do - code = "STDOUT.set_encoding Encoding::IBM775, Encoding::IBM866; " \ - "p [STDOUT.external_encoding.name, STDOUT.internal_encoding.name]" - ruby_exe(code).chomp.should == %{["IBM775", "IBM866"]} - end - - it "has nil for the internal encoding" do - STDOUT.internal_encoding.should be_nil - end - - it "has nil for the internal encoding despite Encoding.default_internal being changed" do - Encoding.default_internal = Encoding::IBM437 - STDOUT.internal_encoding.should be_nil - end - end - - describe "STDERR" do - it "has nil for the external encoding" do - STDERR.external_encoding.should be_nil - end - - it "has nil for the external encoding despite Encoding.default_external being changed" do - Encoding.default_external = Encoding::ISO_8859_1 - STDERR.external_encoding.should be_nil - end - - it "has the encodings set by #set_encoding" do - code = "STDERR.set_encoding Encoding::IBM775, Encoding::IBM866; " \ - "p [STDERR.external_encoding.name, STDERR.internal_encoding.name]" - ruby_exe(code).chomp.should == %{["IBM775", "IBM866"]} - end - - it "has nil for the internal encoding" do - STDERR.internal_encoding.should be_nil - end - - it "has nil for the internal encoding despite Encoding.default_internal being changed" do - Encoding.default_internal = Encoding::IBM437 - STDERR.internal_encoding.should be_nil - end - end - - describe "ARGV" do - it "contains Strings encoded in locale Encoding" do - code = fixture __FILE__, "argv_encoding.rb" - result = ruby_exe(code, args: "a b") - encoding = Encoding.default_external - result.chomp.should == %{["#{encoding}", "#{encoding}"]} - end - end - end -end |