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lib/pp.rb lib/prettyprint.rb: new file.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1936 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2001-12-24 17:38:33 +00:00
parent 4282698219
commit a2ba32fab9
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@ -164,6 +164,8 @@ lib/ostruct.rb
lib/parsearg.rb
lib/parsedate.rb
lib/ping.rb
lib/pp.rb
lib/prettyprint.rb
lib/profile.rb
lib/pstore.rb
lib/rational.rb

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lib/pp.rb Normal file
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# $Id$
=begin
= Pretty-printer for Ruby objects.
== Which seems better?
non-pretty-printed output by (({p})) is:
#<PP:0x806486c @stack=[], @nest=[0], @buf=#<PP::Group:0x8064844 @tail=0, @singleline_length=9, @buf=[#<PP::Group:0x80647cc @tail=0, @singleline_length=9, @buf=[#<PP::Text:0x8064768 @text="[">, #<PP::Group:0x80646c8 @tail=1, @singleline_length=1, @buf=[#<PP::Text:0x8064664 @text="1">]>, #<PP::Text:0x80646b4 @text=",">, #<PP::Breakable:0x8064650 @indent=1, @sep=" ">, #<PP::Group:0x8064614 @tail=1, @singleline_length=1, @buf=[#<PP::Text:0x80645b0 @text="2">]>, #<PP::Text:0x8064600 @text=",">, #<PP::Breakable:0x806459c @indent=1, @sep=" ">, #<PP::Group:0x8064560 @tail=1, @singleline_length=1, @buf=[#<PP::Text:0x80644fc @text="3">]>, #<PP::Text:0x806472c @text="]">]>]>>
pretty-printed output by (({pp})) is:
#<PP:0x403279c
@buf=
#<PP::Group:0x4032666
@buf=
[#<PP::Group:0x4032666
@buf=
[#<PP::Text:0x40326de @text="[">,
#<PP::Group:0x4032666
@buf=[#<PP::Text:0x40326de @text="1">],
@singleline_length=1,
@tail=1>,
#<PP::Text:0x40326de @text=",">,
#<PP::Breakable:0x40326b6 @indent=1, @sep=" ">,
#<PP::Group:0x4032666
@buf=[#<PP::Text:0x40326de @text="2">],
@singleline_length=1,
@tail=1>,
#<PP::Text:0x40326de @text=",">,
#<PP::Breakable:0x40326b6 @indent=1, @sep=" ">,
#<PP::Group:0x4032666
@buf=[#<PP::Text:0x40326de @text="3">],
@singleline_length=1,
@tail=1>,
#<PP::Text:0x40326de @text="]">],
@singleline_length=9,
@tail=0>],
@singleline_length=9,
@tail=0>,
@nest=[0],
@stack=[]>
I like the latter. If you do too, this library is for you.
== Usage
: pp(obj)
output ((|obj|)) to (({$>})) in pretty printed format.
== Customized output
To define your customized pretty printing function for your class,
redefine a method (({pretty_print(((|pp|)))})) in the class.
It takes an argument ((|pp|)) which is an instance of the class ((<PP>)).
The method should use PP#text, PP#breakable, PP#nest, PP#group and
PP#pp to print the object.
= PP
== super class
((<PrettyPrint>))
== class methods
--- PP.pp(obj[, width[, out]])
outputs ((|obj|)) to ((|out|)) in pretty printed format of
((|width|)) columns in width.
--- PP.sharing_detection
returns the sharing detection flag as boolean value.
It is false by default.
--- PP.sharing_detection = value
sets the sharing detection flag.
== methods
--- pp(obj)
adds ((|obj|)) to the pretty printing buffer
using Object#pretty_print or Object#pretty_print_cycled.
Object#pretty_print_cycled is used when ((|obj|)) is already
printed, a.k.a the object reference chain has a cycle.
= Object
--- pretty_print(pp)
is a default pretty printing method for general objects.
If (({self})) has a customized (redefined) (({inspect})) method,
the result of (({self.inspect})) is used but it obviously has no
line break hints.
This module provides predefined pretty_print() methods for some of
the most commonly used built-in classes for convenience.
--- pretty_print_cycled(pp)
is a default pretty printing method for general objects that are
detected as part of a cycle.
=end
require 'prettyprint'
module Kernel
private
def pp(*objs)
objs.each {|obj|
PP.pp(obj)
}
end
end
class PP < PrettyPrint
def PP.pp(obj, width=79, out=$>)
pp = PP.new
pp.guard_inspect_key {pp.pp obj}
pp.format(out, width)
out << "\n"
end
@@sharing_detection = false
def PP.sharing_detection
return @@sharing_detection
end
def PP.sharing_detection=(val)
@@sharing_detection = val
end
def initialize
super
@sharing_detection = @@sharing_detection
end
InspectKey = :__inspect_key__
def guard_inspect_key
if Thread.current[InspectKey] == nil
Thread.current[InspectKey] = []
end
save = Thread.current[InspectKey]
begin
Thread.current[InspectKey] = []
yield
ensure
Thread.current[InspectKey] = save
end
end
def pp(obj)
id = obj.__id__
if Thread.current[InspectKey].include? id
group {obj.pretty_print_cycled self}
return
end
begin
Thread.current[InspectKey] << id
group {obj.pretty_print self}
ensure
Thread.current[InspectKey].pop unless @sharing_detection
end
end
def pp_object(obj)
group {
text '#<'
nest(1) {
text obj.class.name
text ':'
text sprintf('0x%x', obj.__id__)
first = true
obj.instance_variables.sort.each {|v|
if first
first = false
else
text ','
end
breakable
group {
text v
text '='
nest(1) {
breakable ''
pp(obj.instance_eval v)
}
}
}
}
text '>'
}
end
def pp_hash(obj)
group {
text '{'
nest(1) {
first = true
obj.each {|k, v|
if first
first = false
else
text ","
breakable
end
group {
pp k
text '=>'
nest(1) {
group {
breakable ''
pp v
}
}
}
}
}
text '}'
}
end
module ObjectMixin
# 1. specific pretty_print
# 2. specific inspect
# 3. generic pretty_print
Key = :__pp_instead_of_inspect__
def pretty_print(pp)
# specific pretty_print is not defined, try specific inspect.
begin
old = Thread.current[Key]
result1 = sprintf('#<%s:0x%x pretty_printed>', self.class.name, self.__id__)
Thread.current[Key] = [pp, result1]
result2 = ObjectMixin.pp_call_inspect(self)
ensure
Thread.current[Key] = old
end
unless result1.equal? result2
pp.text result2
end
end
def ObjectMixin.pp_call_inspect(obj); obj.inspect; end
CallInspectFrame = "#{__FILE__}:#{__LINE__ - 1}:in `pp_call_inspect'"
def inspect
if CallInspectFrame == caller[0]
# specific inspect is also not defined, use generic pretty_print.
pp, result = Thread.current[Key]
pp.pp_object(self)
result
else
super
end
end
def pretty_print_cycled(pp)
pp.text sprintf("#<%s:0x%x", self.class.name, self.__id__)
pp.breakable
pp.text sprintf("...>")
end
end
end
[Numeric, FalseClass, TrueClass, Module].each {|c|
c.class_eval {
def pretty_print(pp)
pp.text self.to_s
end
}
}
class Array
def pretty_print(pp)
pp.text "["
pp.nest(1) {
first = true
self.each {|v|
if first
first = false
else
pp.text ","
pp.breakable
end
pp.pp v
}
}
pp.text "]"
end
def pretty_print_cycled(pp)
pp.text(empty? ? '[]' : '[...]')
end
end
class Hash
def pretty_print(pp)
pp.pp_hash self
end
def pretty_print_cycled(pp)
pp.text(empty? ? '{}' : '{...}')
end
end
class << ENV
def pretty_print(pp)
pp.pp_hash self
end
end
class Struct
def pretty_print(pp)
pp.text sprintf("#<%s", self.class.name)
pp.nest(1) {
first = true
self.members.each {|member|
if first
first = false
else
pp.text ","
end
pp.breakable
pp.group {
pp.text member.to_s
pp.text '='
pp.nest(1) {
pp.breakable ''
pp.pp self[member]
}
}
}
}
pp.text ">"
end
def pretty_print_cycled(pp)
pp.text sprintf("#<%s:...>", self.class.name)
end
end
class Range
def pretty_print(pp)
pp.pp self.begin
pp.breakable ''
pp.text(self.exclude_end? ? '...' : '..')
pp.breakable ''
pp.pp self.end
end
end
class File
class Stat
def pretty_print(pp)
require 'etc.so'
pp.nest(1) {
pp.text "#<"
pp.text self.class.name
pp.breakable; pp.text "dev="; pp.pp self.dev; pp.text ','
pp.breakable; pp.text "ino="; pp.pp self.ino; pp.text ','
pp.breakable
pp.group {
m = self.mode
pp.text "mode="; pp.pp m
pp.breakable
pp.text sprintf("(0%o %s %c%c%c%c%c%c%c%c%c)",
m, self.ftype,
(m & 0400 == 0 ? ?- : ?r),
(m & 0200 == 0 ? ?- : ?w),
(m & 0100 == 0 ? (m & 04000 == 0 ? ?- : ?S) :
(m & 04000 == 0 ? ?x : ?s)),
(m & 0040 == 0 ? ?- : ?r),
(m & 0020 == 0 ? ?- : ?w),
(m & 0010 == 0 ? (m & 02000 == 0 ? ?- : ?S) :
(m & 02000 == 0 ? ?x : ?s)),
(m & 0004 == 0 ? ?- : ?r),
(m & 0002 == 0 ? ?- : ?w),
(m & 0001 == 0 ? (m & 01000 == 0 ? ?- : ?T) :
(m & 01000 == 0 ? ?x : ?t)))
pp.text ','
}
pp.breakable; pp.text "nlink="; pp.pp self.nlink; pp.text ','
pp.breakable
pp.group {
pp.text "uid="; pp.pp self.uid
begin
name = Etc.getpwuid(self.uid).name
pp.breakable; pp.text "(#{name})"
rescue ArgumentError
end
pp.text ','
}
pp.breakable
pp.group {
pp.text "gid="; pp.pp self.gid
begin
name = Etc.getgrgid(self.gid).name
pp.breakable; pp.text "(#{name})"
rescue ArgumentError
end
pp.text ','
}
pp.breakable; pp.text "rdev="; pp.pp self.rdev; pp.text ','
pp.breakable; pp.text "size="; pp.pp self.size; pp.text ','
pp.breakable; pp.text "blksize="; pp.pp self.blksize; pp.text ','
pp.breakable; pp.text "blocks="; pp.pp self.blocks; pp.text ','
pp.breakable
pp.group {
t = self.atime
pp.text "atime="; pp.pp t
pp.breakable; pp.text "(#{t.tv_sec})"
pp.text ','
}
pp.breakable
pp.group {
t = self.mtime
pp.text "mtime="; pp.pp t
pp.breakable; pp.text "(#{t.tv_sec})"
pp.text ','
}
pp.breakable
pp.group {
t = self.ctime
pp.text "ctime="; pp.pp t
pp.breakable; pp.text "(#{t.tv_sec})"
}
pp.text ">"
}
end
end
end
class Object
include PP::ObjectMixin
end
[Numeric, Symbol, FalseClass, TrueClass, NilClass, Module].each {|c|
c.class_eval {
alias :pretty_print_cycled :pretty_print
}
}
if __FILE__ == $0
require 'runit/testcase'
require 'runit/cui/testrunner'
class PPTest < RUNIT::TestCase
def test_list0123_12
assert_equal("[0, 1, 2, 3]\n", PP.pp([0,1,2,3], 12, ''))
end
def test_list0123_11
assert_equal("[0,\n 1,\n 2,\n 3]\n", PP.pp([0,1,2,3], 11, ''))
end
end
class HasInspect
def initialize(a)
@a = a
end
def inspect
return "<inspect:#{@a.inspect}>"
end
end
class HasPrettyPrint
def initialize(a)
@a = a
end
def pretty_print(pp)
pp.text "<pretty_print:"
pp.pp @a
pp.text ">"
end
end
class HasBoth
def initialize(a)
@a = a
end
def inspect
return "<inspect:#{@a.inspect}>"
end
def pretty_print(pp)
pp.text "<pretty_print:"
pp.pp @a
pp.text ">"
end
end
class PPInspectTest < RUNIT::TestCase
def test_hasinspect
a = HasInspect.new(1)
assert_equal("<inspect:1>\n", PP.pp(a, 79, ''))
end
def test_hasprettyprint
a = HasPrettyPrint.new(1)
assert_equal("<pretty_print:1>\n", PP.pp(a, 79, ''))
end
def test_hasboth
a = HasBoth.new(1)
assert_equal("<pretty_print:1>\n", PP.pp(a, 79, ''))
end
end
class PPCycleTest < RUNIT::TestCase
def test_array
a = []
a << a
assert_equal("[[...]]\n", PP.pp(a, 79, ''))
end
def test_hash
a = {}
a[0] = a
assert_equal("{0=>{...}}\n", PP.pp(a, 79, ''))
end
S = Struct.new("S", :a, :b)
def test_struct
a = S.new(1,2)
a.b = a
assert_equal("#<Struct::S a=1, b=#<Struct::S:...>>\n", PP.pp(a, 79, ''))
end
def test_object
a = Object.new
a.instance_eval {@a = a}
hex = '0x' + ('%x'%a.id)
assert_equal("#<Object:#{hex} @a=#<Object:#{hex} ...>>\n", PP.pp(a, 79, ''))
end
def test_withinspect
a = []
a << HasInspect.new(a)
assert_equal("[<inspect:[...]>]\n", PP.pp(a, 79, ''))
end
end
RUNIT::CUI::TestRunner.run(PPTest.suite)
RUNIT::CUI::TestRunner.run(PPInspectTest.suite)
RUNIT::CUI::TestRunner.run(PPCycleTest.suite)
end

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# $Id$
=begin
= PrettyPrint
The class implements pretty printing algorithm.
It finds line breaks and nice indentations for grouped structure.
By default, the class assumes that primitive elements are strings and
each byte in the strings have single column in width.
But it can be used for other situasions
by giving suitable arguments for some methods:
newline object and space generation block for (({PrettyPrint.new})),
optional width argument for (({PrettyPrint#text})),
(({PrettyPrint#breakable})), etc.
There are several candidates to use them:
text formatting using proportional fonts,
multibyte characters which has columns diffrent to number of bytes,
non-string formatting, etc.
== class methods
--- PrettyPrint.new([newline]) [{|width| ...}]
creates a buffer for pretty printing.
((|newline|)) is used for line breaks.
(({"\n"})) is used if it is not specified.
The block is used to generate spaces.
(({{|width| ' ' * width}})) is used if it is not given.
== methods
--- text(obj[, width])
adds ((|obj|)) as a text of ((|width|)) columns in width.
If ((|width|)) is not specified, (({((|obj|)).length})) is used.
--- breakable([sep[, width]])
tells "you can break a line here if necessary", and a
((|width|))-column text ((|sep|)) is inserted if a line is not
broken at the point.
If ((|sep|)) is not specified, (({" "})) is used.
If ((|width|)) is not specified, (({((|sep|)).length})) is used.
You will have to specify this when ((|sep|)) is a multibyte
character, for example.
--- nest(indent) {...}
increases left margin after newline with ((|indent|)) for line breaks added in the block.
--- group {...}
groups line break hints added in the block.
--- format(out[, width])
outputs buffered data to ((|out|)).
It tries to restrict the line length to ((|width|)) but it may
overflow.
If ((|width|)) is not specified, 79 is assumed.
((|out|)) must have a method named (({<<})) which accepts
a first argument ((|obj|)) of (({PrettyPrint#text})),
a first argument ((|sep|)) of (({PrettyPrint#breakable})),
a first argument ((|newline|)) of (({PrettyPrint.new})),
and
a result of a given block for (({PrettyPrint.new})).
== Bugs
* Line breaks in a group is constrained to whether all line break hints are
to be breaked or not. Maybe, non-constrained version of
PrettyPrint#group should be provided to filling multi lines.
* Box based formatting?
== References
Strictly Pretty, Christian Lindig, March 2000,
((<URL:http://www.gaertner.de/~lindig/papers/strictly-pretty.html>))
A prettier printer, Philip Wadler, March 1998,
((<URL:http://cm.bell-labs.com/cm/cs/who/wadler/topics/recent.html#prettier>))
=end
class PrettyPrint
def initialize(newline="\n", &genspace)
@newline = newline
@genspace = genspace || lambda {|n| ' ' * n}
@buf = Group.new
@nest = [0]
@stack = []
end
def text(obj, width=obj.length)
@buf << Text.new(obj, width)
end
def breakable(sep=' ', width=sep.length)
@buf << Breakable.new(sep, width, @nest.last, @newline, @genspace)
end
def nest(indent)
nest_enter(indent)
begin
yield
ensure
nest_leave
end
end
def nest_enter(indent)
@nest << @nest.last + indent
end
def nest_leave
@nest.pop
end
def group
group_enter
begin
yield
ensure
group_leave
end
end
def group_enter
g = Group.new
@buf << g
@stack << @buf
@buf = g
end
def group_leave
@buf = @stack.pop
end
def format(out, width=79)
tails = [[-1, 0]]
@buf.update_tails(tails, 0)
@buf.multiline_output(out, 0, 0, width)
end
class Text
def initialize(text, width)
@text = text
@width = width
end
def update_tails(tails, group)
tails[-1][1] += @width
end
def singleline_width
return @width
end
def singleline_output(out)
out << @text
end
def multiline_output(out, group, margin, width)
singleline_output(out)
return margin + singleline_width
end
end
class Breakable
def initialize(sep, width, indent, newline, genspace)
@sep = sep
@width = width
@indent = indent
@newline = newline
@genspace = genspace
end
def update_tails(tails, group)
if group == tails[-1][0]
tails[-2][1] += @width + tails[-1][1]
tails[-1][1] = 0
else
tails[-1][1] += @width
tails << [group, 0]
end
end
def singleline_width
return @width
end
def singleline_output(out)
out << @sep
end
def multiline_output(out, group, margin, width)
out << @newline
out << @genspace.call(@indent)
return @indent
end
end
class Group
def initialize
@buf = []
@singleline_width = nil
end
def <<(obj)
@buf << obj
end
def update_tails(tails, group)
@tail = tails.empty? ? 0 : tails[-1][1]
len = 0
@buf.reverse_each {|obj|
obj.update_tails(tails, group + 1)
len += obj.singleline_width
}
@singleline_width = len
while !tails.empty? && group <= tails[-1][0]
tails[-2][1] += tails[-1][1]
tails.pop
end
end
def singleline_width
return @singleline_width
end
def singleline_output(out)
@buf.each {|obj| obj.singleline_output(out)}
end
def multiline_output(out, group, margin, width)
if margin + singleline_width + @tail <= width
singleline_output(out)
margin += singleline_width
else
@buf.each {|obj|
margin = obj.multiline_output(out, group + 1, margin, width)
}
end
return margin
end
end
end
if __FILE__ == $0
require 'runit/testcase'
require 'runit/cui/testrunner'
class WadlerExample < RUNIT::TestCase
def setup
@hello = PrettyPrint.new
@hello.group {
@hello.group {
@hello.group {
@hello.group {
@hello.text 'hello'; @hello.breakable; @hello.text 'a'
}
@hello.breakable; @hello.text 'b'
}
@hello.breakable; @hello.text 'c'
}
@hello.breakable; @hello.text 'd'
}
@tree = Tree.new("aaaa", Tree.new("bbbbb", Tree.new("ccc"),
Tree.new("dd")),
Tree.new("eee"),
Tree.new("ffff", Tree.new("gg"),
Tree.new("hhh"),
Tree.new("ii")))
end
def test_hello_00_06
expected = <<'End'.chomp
hello
a
b
c
d
End
@hello.format(out='', 0); assert_equal(expected, out)
@hello.format(out='', 6); assert_equal(expected, out)
end
def test_hello_07_08
expected = <<'End'.chomp
hello a
b
c
d
End
@hello.format(out='', 7); assert_equal(expected, out)
@hello.format(out='', 8); assert_equal(expected, out)
end
def test_hello_09_10
expected = <<'End'.chomp
hello a b
c
d
End
@hello.format(out='', 9); assert_equal(expected, out)
@hello.format(out='', 10); assert_equal(expected, out)
end
def test_hello_11_12
expected = <<'End'.chomp
hello a b c
d
End
@hello.format(out='', 11); assert_equal(expected, out)
@hello.format(out='', 12); assert_equal(expected, out)
end
def test_hello_13
expected = <<'End'.chomp
hello a b c d
End
@hello.format(out='', 13); assert_equal(expected, out)
end
def test_tree_00_19
pp = PrettyPrint.new
@tree.show(pp)
expected = <<'End'.chomp
aaaa[bbbbb[ccc,
dd],
eee,
ffff[gg,
hhh,
ii]]
End
pp.format(out='', 0); assert_equal(expected, out)
pp.format(out='', 19); assert_equal(expected, out)
end
def test_tree_20_22
pp = PrettyPrint.new
@tree.show(pp)
expected = <<'End'.chomp
aaaa[bbbbb[ccc, dd],
eee,
ffff[gg,
hhh,
ii]]
End
pp.format(out='', 20); assert_equal(expected, out)
pp.format(out='', 22); assert_equal(expected, out)
end
def test_tree_23_43
pp = PrettyPrint.new
@tree.show(pp)
expected = <<'End'.chomp
aaaa[bbbbb[ccc, dd],
eee,
ffff[gg, hhh, ii]]
End
pp.format(out='', 23); assert_equal(expected, out)
pp.format(out='', 43); assert_equal(expected, out)
end
def test_tree_44
pp = PrettyPrint.new
@tree.show(pp)
pp.format(out='', 44)
assert_equal(<<'End'.chomp, out)
aaaa[bbbbb[ccc, dd], eee, ffff[gg, hhh, ii]]
End
end
def test_tree_alt_00_18
pp = PrettyPrint.new
@tree.altshow(pp)
expected = <<'End'.chomp
aaaa[
bbbbb[
ccc,
dd
],
eee,
ffff[
gg,
hhh,
ii
]
]
End
pp.format(out='', 0); assert_equal(expected, out)
pp.format(out='', 18); assert_equal(expected, out)
end
def test_tree_alt_19_20
pp = PrettyPrint.new
@tree.altshow(pp)
expected = <<'End'.chomp
aaaa[
bbbbb[ ccc, dd ],
eee,
ffff[
gg,
hhh,
ii
]
]
End
pp.format(out='', 19); assert_equal(expected, out)
pp.format(out='', 20); assert_equal(expected, out)
end
def test_tree_alt_20_49
pp = PrettyPrint.new
@tree.altshow(pp)
expected = <<'End'.chomp
aaaa[
bbbbb[ ccc, dd ],
eee,
ffff[ gg, hhh, ii ]
]
End
pp.format(out='', 21); assert_equal(expected, out)
pp.format(out='', 49); assert_equal(expected, out)
end
def test_tree_alt_50
pp = PrettyPrint.new
@tree.altshow(pp)
expected = <<'End'.chomp
aaaa[ bbbbb[ ccc, dd ], eee, ffff[ gg, hhh, ii ] ]
End
pp.format(out='', 50); assert_equal(expected, out)
end
class Tree
def initialize(string, *children)
@string = string
@children = children
end
def show(pp)
pp.group {
pp.text @string
pp.nest(@string.length) {
unless @children.empty?
pp.text '['
pp.nest(1) {
first = true
@children.each {|t|
if first
first = false
else
pp.text ','
pp.breakable
end
t.show(pp)
}
}
pp.text ']'
end
}
}
end
def altshow(pp)
pp.group {
pp.text @string
unless @children.empty?
pp.text '['
pp.nest(2) {
pp.breakable
first = true
@children.each {|t|
if first
first = false
else
pp.text ','
pp.breakable
end
t.altshow(pp)
}
}
pp.breakable
pp.text ']'
end
}
end
end
end
class StrictPrettyExample < RUNIT::TestCase
def setup
@pp = PrettyPrint.new
@pp.group {
@pp.group {@pp.nest(2) {
@pp.text "if"; @pp.breakable;
@pp.group {
@pp.nest(2) {
@pp.group {@pp.text "a"; @pp.breakable; @pp.text "=="}
@pp.breakable; @pp.text "b"}}}}
@pp.breakable
@pp.group {@pp.nest(2) {
@pp.text "then"; @pp.breakable;
@pp.group {
@pp.nest(2) {
@pp.group {@pp.text "a"; @pp.breakable; @pp.text "<<"}
@pp.breakable; @pp.text "2"}}}}
@pp.breakable
@pp.group {@pp.nest(2) {
@pp.text "else"; @pp.breakable;
@pp.group {
@pp.nest(2) {
@pp.group {@pp.text "a"; @pp.breakable; @pp.text "+"}
@pp.breakable; @pp.text "b"}}}}}
end
def test_00_04
expected = <<'End'.chomp
if
a
==
b
then
a
<<
2
else
a
+
b
End
@pp.format(out='', 0); assert_equal(expected, out)
@pp.format(out='', 4); assert_equal(expected, out)
end
def test_05
expected = <<'End'.chomp
if
a
==
b
then
a
<<
2
else
a +
b
End
@pp.format(out='', 5); assert_equal(expected, out)
end
def test_06
expected = <<'End'.chomp
if
a ==
b
then
a <<
2
else
a +
b
End
@pp.format(out='', 6); assert_equal(expected, out)
end
def test_07
expected = <<'End'.chomp
if
a ==
b
then
a <<
2
else
a + b
End
@pp.format(out='', 7); assert_equal(expected, out)
end
def test_08
expected = <<'End'.chomp
if
a == b
then
a << 2
else
a + b
End
@pp.format(out='', 8); assert_equal(expected, out)
end
def test_09
expected = <<'End'.chomp
if a == b
then
a << 2
else
a + b
End
@pp.format(out='', 9); assert_equal(expected, out)
end
def test_10
expected = <<'End'.chomp
if a == b
then
a << 2
else a + b
End
@pp.format(out='', 10); assert_equal(expected, out)
end
def test_11_31
expected = <<'End'.chomp
if a == b
then a << 2
else a + b
End
@pp.format(out='', 11); assert_equal(expected, out)
@pp.format(out='', 15); assert_equal(expected, out)
@pp.format(out='', 31); assert_equal(expected, out)
end
def test_32
expected = <<'End'.chomp
if a == b then a << 2 else a + b
End
@pp.format(out='', 32); assert_equal(expected, out)
end
end
class TailGroup < RUNIT::TestCase
def test_1
pp = PrettyPrint.new
pp.group {
pp.group {
pp.text "abc"
pp.breakable
pp.text "def"
}
pp.group {
pp.text "ghi"
pp.breakable
pp.text "jkl"
}
}
pp.format(out='', 10)
assert_equal("abc\ndefghi jkl", out)
end
end
class NonString < RUNIT::TestCase
def setup
@pp = PrettyPrint.new('newline') {|n| "#{n} spaces"}
@pp.text(3, 3)
@pp.breakable(1, 1)
@pp.text(3, 3)
end
def test_6
@pp.format(out=[], 6)
assert_equal([3, "newline", "0 spaces", 3], out)
end
def test_7
@pp.format(out=[], 7)
assert_equal([3, 1, 3], out)
end
end
RUNIT::CUI::TestRunner.run(WadlerExample.suite)
RUNIT::CUI::TestRunner.run(StrictPrettyExample.suite)
RUNIT::CUI::TestRunner.run(TailGroup.suite)
RUNIT::CUI::TestRunner.run(NonString.suite)
end