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|
#! /usr/bin/env ruby
#
$:.unshift '../lib' if __FILE__ == $0 # Make this library first!
require 'diff/lcs'
require 'test/unit'
require 'pp'
require 'diff/lcs/array'
module Diff::LCS::Tests
def __format_diffs(diffs)
diffs.map do |e|
if e.kind_of?(Array)
e.map { |f| f.to_a.join }.join(", ")
else
e.to_a.join
end
end.join("; ")
end
def __map_diffs(diffs, klass = Diff::LCS::Change)
diffs.map do |chunks|
chunks.map { |changes| klass.from_a(*changes) }
end
end
def __simple_callbacks
callbacks = Object.new
class << callbacks
attr_reader :matched_a
attr_reader :matched_b
attr_reader :discards_a
attr_reader :discards_b
attr_reader :done_a
attr_reader :done_b
def reset
@matched_a = []
@matched_b = []
@discards_a = []
@discards_b = []
@done_a = []
@done_b = []
end
def match(event)
@matched_a << event.old_el
@matched_b << event.new_el
end
def discard_b(event)
@discards_b << event.new_el
end
def discard_a(event)
@discards_a << event.old_el
end
def finished_a(event)
@done_a << [event.old_el, event.old_ix]
end
def finished_b(event)
@done_b << [event.new_el, event.new_ix]
end
end
callbacks.reset
callbacks
end
def __balanced_callback
cb = Object.new
class << cb
attr_reader :result
def reset
@result = ""
end
def match(event)
@result << "M#{event.old_ix}#{event.new_ix} "
end
def discard_a(event)
@result << "DA#{event.old_ix}#{event.new_ix} "
end
def discard_b(event)
@result << "DB#{event.old_ix}#{event.new_ix} "
end
def change(event)
@result << "C#{event.old_ix}#{event.new_ix} "
end
end
cb.reset
cb
end
def setup
@seq1 = %w(a b c e h j l m n p)
@seq2 = %w(b c d e f j k l m r s t)
@correct_lcs = %w(b c e j l m)
@skipped_seq1 = 'a h n p'
@skipped_seq2 = 'd f k r s t'
correct_diff = [
[ [ '-', 0, 'a' ] ],
[ [ '+', 2, 'd' ] ],
[ [ '-', 4, 'h' ],
[ '+', 4, 'f' ] ],
[ [ '+', 6, 'k' ] ],
[ [ '-', 8, 'n' ],
[ '-', 9, 'p' ],
[ '+', 9, 'r' ],
[ '+', 10, 's' ],
[ '+', 11, 't' ] ] ]
@correct_diff = __map_diffs(correct_diff, Diff::LCS::Change)
end
end
class TestLCS < Test::Unit::TestCase
include Diff::LCS::Tests
def test_lcs
res = ares = bres = nil
assert_nothing_raised { res = Diff::LCS.__lcs(@seq1, @seq2) }
# The result of the LCS (less the +nil+ values) must be as long as the
# correct result.
assert_equal(res.compact.size, @correct_lcs.size)
res.each_with_index { |ee, ii| assert(ee.nil? || (@seq1[ii] == @seq2[ee])) }
assert_nothing_raised { ares = (0...res.size).map { |ii| res[ii] ? @seq1[ii] : nil } }
assert_nothing_raised { bres = (0...res.size).map { |ii| res[ii] ? @seq2[res[ii]] : nil } }
assert_equal(@correct_lcs, ares.compact)
assert_equal(@correct_lcs, bres.compact)
assert_nothing_raised { res = Diff::LCS.LCS(@seq1, @seq2) }
assert_equal(res.compact, @correct_lcs)
end
end
class TestSequences < Test::Unit::TestCase
include Diff::LCS::Tests
def test_sequences
callbacks = nil
assert_nothing_raised do
callbacks = __simple_callbacks
class << callbacks
undef :finished_a
undef :finished_b
end
Diff::LCS.traverse_sequences(@seq1, @seq2, callbacks)
end
assert_equal(@correct_lcs.size, callbacks.matched_a.size)
assert_equal(@correct_lcs.size, callbacks.matched_b.size)
assert_equal(@skipped_seq1, callbacks.discards_a.join(" "))
assert_equal(@skipped_seq2, callbacks.discards_b.join(" "))
assert_nothing_raised do
callbacks = __simple_callbacks
Diff::LCS.traverse_sequences(@seq1, @seq2, callbacks)
end
assert_equal(@correct_lcs.size, callbacks.matched_a.size)
assert_equal(@correct_lcs.size, callbacks.matched_b.size)
assert_equal(@skipped_seq1, callbacks.discards_a.join(" "))
assert_equal(@skipped_seq2, callbacks.discards_b.join(" "))
assert_equal(9, callbacks.done_a[0][1])
assert_nil(callbacks.done_b[0])
# seqw = %w(abcd efgh ijkl mnopqrstuvwxyz)
# assert_nothing_raised do
# callbacks = __simple_callbacks
# class << callbacks
# undef :finished_a
# undef :finished_b
# end
# Diff::LCS.traverse_sequences(seqw, [], callbacks)
# end
end
def test_diff
diff = nil
assert_nothing_raised { diff = Diff::LCS.diff(@seq1, @seq2) }
assert_equal(__format_diffs(@correct_diff), __format_diffs(diff))
assert_equal(@correct_diff, diff)
end
def test_diff_empty
seqw = %w(abcd efgh ijkl mnopqrstuvwxyz)
correct_diff = [
[ [ '-', 0, 'abcd' ],
[ '-', 1, 'efgh' ],
[ '-', 2, 'ijkl' ],
[ '-', 3, 'mnopqrstuvwxyz' ] ] ]
diff = nil
assert_nothing_raised { diff = Diff::LCS.diff(seqw, []) }
assert_equal(__format_diffs(correct_diff), __format_diffs(diff))
correct_diff = [
[ [ '+', 0, 'abcd' ],
[ '+', 1, 'efgh' ],
[ '+', 2, 'ijkl' ],
[ '+', 3, 'mnopqrstuvwxyz' ] ] ]
assert_nothing_raised { diff = Diff::LCS.diff([], seqw) }
assert_equal(__format_diffs(correct_diff), __format_diffs(diff))
end
end
class TestBalanced < Test::Unit::TestCase
include Diff::LCS::Tests
def test_sdiff_a
sdiff = nil
seq1 = %w(abc def yyy xxx ghi jkl)
seq2 = %w(abc dxf xxx ghi jkl)
correct_sdiff = [
[ 'u', 'abc', 'abc' ],
[ '!', 'def', 'dxf' ],
[ '-', 'yyy', nil ],
[ 'u', 'xxx', 'xxx' ],
[ 'u', 'ghi', 'ghi' ],
[ 'u', 'jkl', 'jkl' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_b
sdiff = nil
correct_sdiff = [
[ '-', 'a', nil ],
[ 'u', 'b', 'b' ],
[ 'u', 'c', 'c' ],
[ '+', nil, 'd' ],
[ 'u', 'e', 'e' ],
[ '!', 'h', 'f' ],
[ 'u', 'j', 'j' ],
[ '+', nil, 'k' ],
[ 'u', 'l', 'l' ],
[ 'u', 'm', 'm' ],
[ '!', 'n', 'r' ],
[ '!', 'p', 's' ],
[ '+', nil, 't' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(@seq1, @seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_c
sdiff = nil
seq1 = %w(a b c d e)
seq2 = %w(a e)
correct_sdiff = [
[ 'u', 'a', 'a' ],
[ '-', 'b', nil ],
[ '-', 'c', nil ],
[ '-', 'd', nil ],
[ 'u', 'e', 'e' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_d
sdiff = nil
seq1 = %w(a e)
seq2 = %w(a b c d e)
correct_sdiff = [
[ 'u', 'a', 'a' ],
[ '+', nil, 'b' ],
[ '+', nil, 'c' ],
[ '+', nil, 'd' ],
[ 'u', 'e', 'e' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_e
sdiff = nil
seq1 = %w(v x a e)
seq2 = %w(w y a b c d e)
correct_sdiff = [
[ '!', 'v', 'w' ],
[ '!', 'x', 'y' ],
[ 'u', 'a', 'a' ],
[ '+', nil, 'b' ],
[ '+', nil, 'c' ],
[ '+', nil, 'd' ],
[ 'u', 'e', 'e' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_f
sdiff = nil
seq1 = %w(x a e)
seq2 = %w(a b c d e)
correct_sdiff = [
[ '-', 'x', nil ],
[ 'u', 'a', 'a' ],
[ '+', nil, 'b' ],
[ '+', nil, 'c' ],
[ '+', nil, 'd' ],
[ 'u', 'e', 'e' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_g
sdiff = nil
seq1 = %w(a e)
seq2 = %w(x a b c d e)
correct_sdiff = [
[ '+', nil, 'x' ],
[ 'u', 'a', 'a' ],
[ '+', nil, 'b' ],
[ '+', nil, 'c' ],
[ '+', nil, 'd' ],
[ 'u', 'e', 'e' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_h
sdiff = nil
seq1 = %w(a e v)
seq2 = %w(x a b c d e w x)
correct_sdiff = [
[ '+', nil, 'x' ],
[ 'u', 'a', 'a' ],
[ '+', nil, 'b' ],
[ '+', nil, 'c' ],
[ '+', nil, 'd' ],
[ 'u', 'e', 'e' ],
[ '!', 'v', 'w' ],
[ '+', nil, 'x' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_i
sdiff = nil
seq1 = %w()
seq2 = %w(a b c)
correct_sdiff = [
[ '+', nil, 'a' ],
[ '+', nil, 'b' ],
[ '+', nil, 'c' ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_j
sdiff = nil
seq1 = %w(a b c)
seq2 = %w()
correct_sdiff = [
[ '-', 'a', nil ],
[ '-', 'b', nil ],
[ '-', 'c', nil ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_k
sdiff = nil
seq1 = %w(a b c)
seq2 = %w(1)
correct_sdiff = [
[ '!', 'a', '1' ],
[ '-', 'b', nil ],
[ '-', 'c', nil ] ]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_l
sdiff = nil
seq1 = %w(a b c)
seq2 = %w(c)
correct_sdiff = [
[ '-', 'a', nil ],
[ '-', 'b', nil ],
[ 'u', 'c', 'c' ]
]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_m
sdiff = nil
seq1 = %w(abcd efgh ijkl mnop)
seq2 = []
correct_sdiff = [
[ '-', 'abcd', nil ],
[ '-', 'efgh', nil ],
[ '-', 'ijkl', nil ],
[ '-', 'mnop', nil ]
]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_sdiff_n
sdiff = nil
seq1 = []
seq2 = %w(abcd efgh ijkl mnop)
correct_sdiff = [
[ '+', nil, 'abcd' ],
[ '+', nil, 'efgh' ],
[ '+', nil, 'ijkl' ],
[ '+', nil, 'mnop' ]
]
correct_sdiff = __map_diffs([correct_sdiff])
assert_nothing_raised { sdiff = Diff::LCS.sdiff(seq1, seq2) }
assert_equal(correct_sdiff[0], sdiff)
end
def test_balanced_a
seq1 = %w(a b c)
seq2 = %w(a x c)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("M00 C11 M22 ", callback.result)
end
def test_balanced_b
seq1 = %w(a b c)
seq2 = %w(a x c)
callback = nil
assert_nothing_raised do
callback = __balanced_callback
class << callback
undef change
end
end
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("M00 DA11 DB21 M22 ", callback.result)
end
def test_balanced_c
seq1 = %w(a x y c)
seq2 = %w(a v w c)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("M00 C11 C22 M33 ", callback.result)
end
def test_balanced_d
seq1 = %w(x y c)
seq2 = %w(v w c)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("C00 C11 M22 ", callback.result)
end
def test_balanced_e
seq1 = %w(a x y z)
seq2 = %w(b v w)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("C00 C11 C22 DA33 ", callback.result)
end
def test_balanced_f
seq1 = %w(a z)
seq2 = %w(a)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("M00 DA11 ", callback.result)
end
def test_balanced_g
seq1 = %w(z a)
seq2 = %w(a)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("DA00 M10 ", callback.result)
end
def test_balanced_h
seq1 = %w(a b c)
seq2 = %w(x y z)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("C00 C11 C22 ", callback.result)
end
def test_balanced_i
seq1 = %w(abcd efgh ijkl mnopqrstuvwxyz)
seq2 = []
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("DA00 DA10 DA20 DA30 ", callback.result)
end
def test_balanced_j
seq1 = []
seq2 = %w(abcd efgh ijkl mnopqrstuvwxyz)
callback = nil
assert_nothing_raised { callback = __balanced_callback }
assert_nothing_raised { Diff::LCS.traverse_balanced(seq1, seq2, callback) }
assert_equal("DB00 DB01 DB02 DB03 ", callback.result)
end
end
|