Beispiel #1
0
def test_remove_unnecessary_parens():
	# mult contains a pattern containing a single conc containing a single mult?
	# that can be reduced greatly
	assert conc.parse("(a){2}b").reduce() == conc.parse("a{2}b")
	assert conc.parse("(a?)+b").reduce() == conc.parse("a*b")
	assert mult.parse("([ab])*").reduce() == mult.parse("[ab]*")
	assert mult.parse("(c{1,2}){3,4}").reduce() == mult.parse("c{3,8}")
Beispiel #2
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def test_mult_gen():
	# One term
	gen = mult.parse("[ab]").strings()
	assert next(gen) == "a"
	assert next(gen) == "b"
	try:
		next(gen)
		assert False
	except StopIteration:
		assert True

	# No terms
	gen = mult.parse("[ab]{0}").strings()
	assert next(gen) == ""
	try:
		next(gen)
		assert False
	except StopIteration:
		assert True

	# Many terms
	gen = mult.parse("[ab]*").strings()
	assert next(gen) == ""
	assert next(gen) == "a"
	assert next(gen) == "b"
	assert next(gen) == "aa"
	assert next(gen) == "ab"
	assert next(gen) == "ba"
	assert next(gen) == "bb"
	assert next(gen) == "aaa"
def test_charclass_multiplication():
	# a * 1 = a
	assert charclass("a") * one == charclass("a")
	# a * {1,3} = a{1,3}
	assert charclass("a") * multiplier.parse("{1,3}") == mult.parse("a{1,3}")
	# a * {4,} = a{4,}
	assert charclass("a") * multiplier.parse("{4,}") == mult.parse("a{4,}")
Beispiel #4
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def test_mult_gen():
	# One term
	gen = mult.parse("[ab]").strings()
	assert next(gen) == "a"
	assert next(gen) == "b"
	try:
		next(gen)
		assert False
	except StopIteration:
		assert True

	# No terms
	gen = mult.parse("[ab]{0}").strings()
	assert next(gen) == ""
	try:
		next(gen)
		assert False
	except StopIteration:
		assert True

	# Many terms
	gen = mult.parse("[ab]*").strings()
	assert next(gen) == ""
	assert next(gen) == "a"
	assert next(gen) == "b"
	assert next(gen) == "aa"
	assert next(gen) == "ab"
	assert next(gen) == "ba"
	assert next(gen) == "bb"
	assert next(gen) == "aaa"
Beispiel #5
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def test_remove_unnecessary_parens():
	# mult contains a pattern containing a single conc containing a single mult?
	# that can be reduced greatly
	assert conc.parse("(a){2}b").reduce() == conc.parse("a{2}b")
	assert conc.parse("(a?)+b").reduce() == conc.parse("a*b")
	assert mult.parse("([ab])*").reduce() == mult.parse("[ab]*")
	assert mult.parse("(c{1,2}){3,4}").reduce() == mult.parse("c{3,8}")
def test_remove_unnecessary_parens():
	# mult contains a pattern containing a single conc containing a single mult?
	# that can be reduced greatly
	# e.g. "([ab])*" -> "[ab]*"
	assert mult.parse("([ab])*").reduce() == mult.parse("[ab]*")
	# e.g. "(c{1,2}){3,4}" -> "c{3,8}"
	assert mult.parse("(c{1,2}){3,4}").reduce() == mult.parse("c{3,8}")
Beispiel #7
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def test_mult_factor_out_qm():
	# mult contains a pattern containing an empty conc? Pull the empty
	# part out where it's external
	assert mult.parse("(a|b*|)").reduce() == mult.parse("(a|b*)?")
	assert conc.parse("(a|b*|)c").reduce() == conc.parse("(a|b*)?c")
	# This happens even if emptystring is the only thing left inside the mult
	assert mult.parse("()").reduce() == conc.parse("")
	assert mult.parse("([$%\\^]|){1}").reduce() == mult.parse("[$%\\^]?")
Beispiel #8
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def test_mult_factor_out_qm():
	# mult contains a pattern containing an empty conc? Pull the empty
	# part out where it's external
	assert mult.parse("(a|b*|)").reduce() == mult.parse("(a|b*)?")
	assert conc.parse("(a|b*|)c").reduce() == conc.parse("(a|b*)?c")
	# This happens even if emptystring is the only thing left inside the mult
	assert mult.parse("()").reduce() == conc.parse("")
	assert mult.parse("([$%\\^]|){1}").reduce() == mult.parse("[$%\\^]?")
Beispiel #9
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def test_main_bug():
	assert parse("a*").reduce() == mult.parse("a*")
	assert parse("a|a*").reduce() == mult.parse("a*")
	assert parse("a{1,2}|a{3,4}|bc").reduce() == pattern.parse("a{1,4}|bc")
	assert parse("a{1,2}|bc|a{3,4}").reduce() == pattern.parse("a{1,4}|bc")
	assert parse("a{1,2}|a{3,4}|a{5,6}|bc").reduce() == pattern.parse("a{1,6}|bc")
	assert parse("a{1,2}|a{3}|a{5,6}").reduce() == conc.parse("a{1,2}(a?|a{4})")
	assert parse("a{1,2}|a{3}|a{5,6}|bc").reduce() == pattern.parse("a{1,3}|a{5,6}|bc")
	assert parse("a{1,2}|a{4}|a{5,6}").reduce() == conc.parse("a{1,2}(a{3,4})?")
	assert parse("a{1,2}|a{4}|a{5,6}|bc").reduce() == pattern.parse("a{1,2}|a{4,6}|bc")
	assert (parse("a") | parse("a*")).reduce() == mult.parse("a*")
Beispiel #10
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def test_main_bug():
	assert parse("a*").reduce() == mult.parse("a*")
	assert parse("a|a*").reduce() == mult.parse("a*")
	assert parse("a{1,2}|a{3,4}|bc").reduce() == pattern.parse("a{1,4}|bc")
	assert parse("a{1,2}|bc|a{3,4}").reduce() == pattern.parse("a{1,4}|bc")
	assert parse("a{1,2}|a{3,4}|a{5,6}|bc").reduce() == pattern.parse("a{1,6}|bc")
	assert parse("a{1,2}|a{3}|a{5,6}").reduce() == conc.parse("a{1,2}(a?|a{4})")
	assert parse("a{1,2}|a{3}|a{5,6}|bc").reduce() == pattern.parse("a{1,3}|a{5,6}|bc")
	assert parse("a{1,2}|a{4}|a{5,6}").reduce() == conc.parse("a{1,2}(a{3,4})?")
	assert parse("a{1,2}|a{4}|a{5,6}|bc").reduce() == pattern.parse("a{1,2}|a{4,6}|bc")
	assert (parse("a") | parse("a*")).reduce() == mult.parse("a*")
Beispiel #11
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def test_cardinality():
	assert charclass.parse("[]").cardinality() == 0
	assert mult.parse("[]?").cardinality() == 1
	assert mult.parse("[]{0,6}").cardinality() == 1
	assert mult.parse("[ab]{3}").cardinality() == 8
	assert mult.parse("[ab]{2,3}").cardinality() == 12
	assert len(pattern.parse("abc|def(ghi|jkl)")) == 3
	try:
		len(pattern.parse(".*"))
		assert False
	except OverflowError:
		assert True
Beispiel #12
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def test_empty():
	assert nothing.empty()
	assert charclass().empty()
	assert not dot.empty()
	assert not mult.parse("a{0}").empty()
	assert mult.parse("[]").empty()
	assert not mult.parse("[]?").empty()
	assert conc.parse("a[]").empty()
	assert not conc.parse("a[]?").empty()
	assert pattern().empty()
	assert not pattern.parse("a{0}").empty()
	assert not pattern.parse("[]?").empty()
Beispiel #13
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def test_empty():
	assert nothing.empty()
	assert charclass().empty()
	assert not dot.empty()
	assert not mult.parse("a{0}").empty()
	assert mult.parse("[]").empty()
	assert not mult.parse("[]?").empty()
	assert conc.parse("a[]").empty()
	assert not conc.parse("a[]?").empty()
	assert pattern().empty()
	assert not pattern.parse("a{0}").empty()
	assert not pattern.parse("[]?").empty()
Beispiel #14
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def test_cardinality():
	assert charclass.parse("[]").cardinality() == 0
	assert mult.parse("[]?").cardinality() == 1
	assert mult.parse("[]{0,6}").cardinality() == 1
	assert mult.parse("[ab]{3}").cardinality() == 8
	assert mult.parse("[ab]{2,3}").cardinality() == 12
	assert len(pattern.parse("abc|def(ghi|jkl)")) == 3
	try:
		len(pattern.parse(".*"))
		assert False
	except OverflowError:
		assert True
def test_conc_reduction_basic():
	assert conc.parse("a[]b").reduce() == charclass.parse("[]")
	# conc -> conc
	assert conc.parse("ab").reduce() == conc.parse("ab")
	# conc -> mult
	assert conc.parse("a{3,4}").reduce() == mult.parse("a{3,4}")
	# conc -> charclass
	assert conc.parse("a").reduce() == charclass.parse("a")
def test_pattern_reduce_basic():
	# pattern -> pattern
	# (ab|cd) -> (ab|cd)
	assert pattern.parse("ab|cd").reduce() == pattern.parse("ab|cd")
	# pattern -> conc
	assert pattern.parse("a{2}b{2}").reduce() == conc.parse("a{2}b{2}")
	# pattern -> mult
	assert pattern.parse("a{2}").reduce() == mult.parse("a{2}")
	# pattern -> charclass
	assert pattern.parse("a").reduce() == charclass.parse("a")
Beispiel #17
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def test_mult_parsing():
	assert mult.parse("[a-g]+") == mult(charclass("abcdefg"), plus)
	assert mult.parse("[a-g0-8$%]+") == mult(charclass("abcdefg012345678$%"), plus)
	assert mult.parse("[a-g0-8$%\\^]+") == mult(charclass("abcdefg012345678$%^"), plus)
	assert mult.match("abcde[^fg]*", 5) == (
		mult(~charclass("fg"), star),
		11
	)
	assert mult.match("abcde[^fg]*h{5}[a-z]+", 11) == (
		mult(charclass("h"), multiplier(bound(5), bound(5))),
		15
	)
	assert mult.match("abcde[^fg]*h{5}[a-z]+T{1,}", 15) == (
		mult(charclass("abcdefghijklmnopqrstuvwxyz"), plus),
		21
	)
	assert mult.match("abcde[^fg]*h{5}[a-z]+T{2,}", 21) == (
		mult(charclass("T"), multiplier(bound(2), inf)),
		26
	)
Beispiel #18
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def test_mult_reduction_easy():
	assert mult.parse("a").reduce() == charclass.parse("a")
	assert mult.parse("a").reduce() == charclass("a")
	assert mult.parse("a?").reduce() == mult(charclass("a"), qm)
	assert mult.parse("a{0}").reduce() == emptystring
	assert mult.parse("[]").reduce() == nothing
	assert mult.parse("[]?").reduce() == emptystring
	assert mult.parse("[]{0}").reduce() == emptystring
	assert mult.parse("[]{0,5}").reduce() == emptystring
	assert mult(pattern(), one).reduce() == nothing
	assert mult(pattern(), qm).reduce() == emptystring
	assert mult(pattern(), zero).reduce() == emptystring
	assert mult(pattern(), multiplier.parse("{0,5}")).reduce() == emptystring
Beispiel #19
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def test_mult_reduction_easy():
	assert mult.parse("a").reduce() == charclass.parse("a")
	assert mult.parse("a").reduce() == charclass("a")
	assert mult.parse("a?").reduce() == mult(charclass("a"), qm)
	assert mult.parse("a{0}").reduce() == emptystring
	assert mult.parse("[]").reduce() == nothing
	assert mult.parse("[]?").reduce() == emptystring
	assert mult.parse("[]{0}").reduce() == emptystring
	assert mult.parse("[]{0,5}").reduce() == emptystring
	assert mult(pattern(), one).reduce() == nothing
	assert mult(pattern(), qm).reduce() == emptystring
	assert mult(pattern(), zero).reduce() == emptystring
	assert mult(pattern(), multiplier.parse("{0,5}")).reduce() == emptystring
Beispiel #20
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def test_mult_parsing():
	assert mult.parse("[a-g]+") == mult(charclass("abcdefg"), plus)
	assert mult.parse("[a-g0-8$%]+") == mult(charclass("abcdefg012345678$%"), plus)
	assert mult.parse("[a-g0-8$%\\^]+") == mult(charclass("abcdefg012345678$%^"), plus)
	assert mult.match("abcde[^fg]*", 5) == (
		mult(~charclass("fg"), star),
		11
	)
	assert mult.match("abcde[^fg]*h{5}[a-z]+", 11) == (
		mult(charclass("h"), multiplier(bound(5), bound(5))),
		15
	)
	assert mult.match("abcde[^fg]*h{5}[a-z]+T{1,}", 15) == (
		mult(charclass("abcdefghijklmnopqrstuvwxyz"), plus),
		21
	)
	assert mult.match("abcde[^fg]*h{5}[a-z]+T{2,}", 21) == (
		mult(charclass("T"), multiplier(bound(2), inf)),
		26
	)
def test_mult_multiplication():
	# a{2,3} * 1 = a{2,3}
	assert mult.parse("a{2,3}") * one == mult.parse("a{2,3}")
	# a{2,3} * {4,5} = a{8,15}
	assert mult.parse("a{2,3}") * multiplier.parse("{4,5}") == mult.parse("a{8,15}")
	# a{2,} * {2,} = a{4,}
	assert mult.parse("a{2,}") * multiplier.parse("{2,}") == mult.parse("a{4,}")
Beispiel #22
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def test_concatenation():
	assert charclass.parse("a") + charclass.parse("b") == conc.parse("ab")
	assert charclass.parse("a") + mult.parse("b{0,8}") == conc.parse("ab{0,8}")
	assert charclass.parse("a") + conc.parse("bc") == conc.parse("abc")
	assert charclass.parse("a") + pattern.parse("b|cd") == conc.parse("a(b|cd)")
	assert mult.parse("b{0,8}") + charclass.parse("c") == conc.parse("b{0,8}c")
	assert mult.parse("a{3,4}") + mult.parse("b?") == conc.parse("a{3,4}b?")
	assert mult.parse("a{2}") + conc.parse("bc") == conc.parse("a{2}bc")
	assert mult.parse("a{2,3}") + pattern.parse("b|cd") == conc.parse("a{2,3}(b|cd)")
	assert conc.parse("ab") + charclass.parse("c") == conc.parse("abc")
	assert conc.parse("ab") + mult.parse("c*") == conc.parse("abc*")
	assert conc.parse("") + conc.parse("") == conc.parse("")
	assert conc.parse("ab") + conc.parse("cd") == conc.parse("abcd")
	assert conc.parse("za{2,3}") + pattern.parse("b|cd") == conc.parse("za{2,3}(b|cd)")
	assert pattern.parse("a|bd") + charclass.parse("c") == conc.parse("(a|bd)c")
	assert pattern.parse("b|cd") + mult.parse("a{2,3}") == conc.parse("(b|cd)a{2,3}")
	assert pattern.parse("b|cd") + conc.parse("za{2,3}") == conc.parse("(b|cd)za{2,3}")
	assert pattern.parse("a|bc") + pattern.parse("c|de") == conc.parse("(a|bc)(c|de)")
Beispiel #23
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def test_concatenation():
	assert charclass.parse("a") + charclass.parse("b") == conc.parse("ab")
	assert charclass.parse("a") + mult.parse("b{0,8}") == conc.parse("ab{0,8}")
	assert charclass.parse("a") + conc.parse("bc") == conc.parse("abc")
	assert charclass.parse("a") + pattern.parse("b|cd") == conc.parse("a(b|cd)")
	assert mult.parse("b{0,8}") + charclass.parse("c") == conc.parse("b{0,8}c")
	assert mult.parse("a{3,4}") + mult.parse("b?") == conc.parse("a{3,4}b?")
	assert mult.parse("a{2}") + conc.parse("bc") == conc.parse("a{2}bc")
	assert mult.parse("a{2,3}") + pattern.parse("b|cd") == conc.parse("a{2,3}(b|cd)")
	assert conc.parse("ab") + charclass.parse("c") == conc.parse("abc")
	assert conc.parse("ab") + mult.parse("c*") == conc.parse("abc*")
	assert conc.parse("") + conc.parse("") == conc.parse("")
	assert conc.parse("ab") + conc.parse("cd") == conc.parse("abcd")
	assert conc.parse("za{2,3}") + pattern.parse("b|cd") == conc.parse("za{2,3}(b|cd)")
	assert pattern.parse("a|bd") + charclass.parse("c") == conc.parse("(a|bd)c")
	assert pattern.parse("b|cd") + mult.parse("a{2,3}") == conc.parse("(b|cd)a{2,3}")
	assert pattern.parse("b|cd") + conc.parse("za{2,3}") == conc.parse("(b|cd)za{2,3}")
	assert pattern.parse("a|bc") + pattern.parse("c|de") == conc.parse("(a|bc)(c|de)")
Beispiel #24
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def test_reduce_concatenations():
	assert parse("aa").reduce() == mult.parse("a{2}")
	assert parse("bb").reduce() == mult.parse("b{2}")
	assert parse("b*b").reduce() == mult.parse("b+")
	assert parse("aa{2,}").reduce() == mult.parse("a{3,}")
	assert parse("a*a{2}").reduce() == mult.parse("a{2,}")
	assert parse("aa{0,8}").reduce() == mult.parse("a{1,9}")
	assert parse("b{0,8}b").reduce() == mult.parse("b{1,9}")
	assert parse("aab").reduce() == conc.parse("a{2}b")
	assert parse("abb").reduce() == conc.parse("ab{2}")
	assert parse("abb*").reduce() == conc.parse("ab+")
	assert parse("abbc").reduce() == conc.parse("ab{2}c")
	assert parse("a?ab").reduce() == conc.parse("a{1,2}b")
	assert parse("(ac{2}|bc+)c").reduce() == conc.parse("(ac|bc*)c{2}")
	assert parse("a(a{2}b|a+c)").reduce() == conc.parse("a{2}(ab|a*c)")
	assert parse("a{2,3}(a{2}b|a+c)").reduce() == conc.parse("a{3,4}(ab|a*c)")
	assert parse("(ba{2}|ca+)a{2,3}").reduce() == conc.parse("(ba|ca*)a{3,4}")
	assert parse("za{2,3}(a{2}b|a+c)").reduce() == conc.parse("za{3,4}(ab|a*c)")
	assert parse("(ba{2}|ca+)a{2,3}z").reduce() == conc.parse("(ba|ca*)a{3,4}z")
	assert parse("(a|bc)(a|bc)").reduce() == mult.parse("(a|bc){2}")
Beispiel #25
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def test_reduce_concatenations():
	assert parse("aa").reduce() == mult.parse("a{2}")
	assert parse("bb").reduce() == mult.parse("b{2}")
	assert parse("b*b").reduce() == mult.parse("b+")
	assert parse("aa{2,}").reduce() == mult.parse("a{3,}")
	assert parse("a*a{2}").reduce() == mult.parse("a{2,}")
	assert parse("aa{0,8}").reduce() == mult.parse("a{1,9}")
	assert parse("b{0,8}b").reduce() == mult.parse("b{1,9}")
	assert parse("aab").reduce() == conc.parse("a{2}b")
	assert parse("abb").reduce() == conc.parse("ab{2}")
	assert parse("abb*").reduce() == conc.parse("ab+")
	assert parse("abbc").reduce() == conc.parse("ab{2}c")
	assert parse("a?ab").reduce() == conc.parse("a{1,2}b")
	assert parse("(ac{2}|bc+)c").reduce() == conc.parse("(ac|bc*)c{2}")
	assert parse("a(a{2}b|a+c)").reduce() == conc.parse("a{2}(ab|a*c)")
	assert parse("a{2,3}(a{2}b|a+c)").reduce() == conc.parse("a{3,4}(ab|a*c)")
	assert parse("(ba{2}|ca+)a{2,3}").reduce() == conc.parse("(ba|ca*)a{3,4}")
	assert parse("za{2,3}(a{2}b|a+c)").reduce() == conc.parse("za{3,4}(ab|a*c)")
	assert parse("(ba{2}|ca+)a{2,3}z").reduce() == conc.parse("(ba|ca*)a{3,4}z")
	assert parse("(a|bc)(a|bc)").reduce() == mult.parse("(a|bc){2}")
Beispiel #26
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def test_pattern_generator():
	gen = pattern.parse("[ab]|[cde]").strings()
	assert next(gen) == "a"
	assert next(gen) == "b"
	assert next(gen) == "c"
	assert next(gen) == "d"
	assert next(gen) == "e"
	try:
		next(gen)
		assert False
	except StopIteration:
		assert True

	# more complex
	gen = pattern.parse("abc|def(ghi|jkl)").strings()
	assert next(gen) == "abc"
	assert next(gen) == "defghi"
	assert next(gen) == "defjkl"

	gen = mult.parse("[0-9a-fA-F]{3,10}").strings()
	assert next(gen) == "000"
	assert next(gen) == "001"
	assert next(gen) == "002"
Beispiel #27
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def test_pattern_generator():
	gen = pattern.parse("[ab]|[cde]").strings()
	assert next(gen) == "a"
	assert next(gen) == "b"
	assert next(gen) == "c"
	assert next(gen) == "d"
	assert next(gen) == "e"
	try:
		next(gen)
		assert False
	except StopIteration:
		assert True

	# more complex
	gen = pattern.parse("abc|def(ghi|jkl)").strings()
	assert next(gen) == "abc"
	assert next(gen) == "defghi"
	assert next(gen) == "defjkl"

	gen = mult.parse("[0-9a-fA-F]{3,10}").strings()
	assert next(gen) == "000"
	assert next(gen) == "001"
	assert next(gen) == "002"
Beispiel #28
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def test_conc_reduction_basic():
	assert conc.parse("a").reduce() == charclass.parse("a")
	assert conc.parse("a{3,4}").reduce() == mult.parse("a{3,4}")
	assert conc.parse("ab").reduce() == conc.parse("ab")
	assert conc.parse("a[]b").reduce() == charclass.parse("[]")
Beispiel #29
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def test_even_star_bug():
	# Defect: (a{2})* should NOT reduce to a*
	a2 = mult.parse("a{2}")
	a2star = a2 * star
	assert a2star == mult.parse("(a{2})*")
Beispiel #30
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def test_mult_common():
	assert mult.parse("a{3,4}").common(mult.parse("a{2,5}")) == mult.parse("a{2,3}")
	assert mult.parse("a{2,}").common(mult.parse("a{1,5}")) == mult.parse("a{1,5}")
	assert mult.parse("a{3,}").common(mult.parse("a{2,}")) == mult.parse("a{2,}")
Beispiel #31
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def test_charclass_multiplication():
	assert charclass("a") * one == charclass("a")
	assert charclass("a") * multiplier.parse("{1,3}") == mult.parse("a{1,3}")
	assert charclass("a") * multiplier.parse("{4,}") == mult.parse("a{4,}")
Beispiel #32
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def test_mult_multiplication():
	assert mult.parse("a{2,3}") * one == mult.parse("a{2,3}")
	assert mult.parse("a{2,3}") * multiplier.parse("{4,5}") == mult.parse("a{8,15}")
	assert mult.parse("a{2,}") * multiplier.parse("{2,}") == mult.parse("a{4,}")
Beispiel #33
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def test_mult_squoosh():
	# sequence squooshing of mults within a conc
	assert conc.parse("[0-9a-fA-F][0-9a-fA-F][0-9a-fA-F]").reduce() == mult.parse("[0-9A-Fa-f]{3}")
	assert conc.parse("[$%\\^]?[$%\\^]").reduce() == mult.parse("[$%\\^]{1,2}")
	assert conc.parse("(|(|(|(|(|(|[$%\\^])[$%\\^])[$%\\^])[$%\\^])[$%\\^])[$%\\^])[$%\\^][$%\\^]").reduce() == mult.parse("[$%\\^]{2,8}")
Beispiel #34
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def test_conc_multiplication():
	assert conc.parse("ab?") * qm == mult.parse("(ab?)?")
Beispiel #35
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def test_conc_multiplication():
	assert conc.parse("ab?") * qm == mult.parse("(ab?)?")
Beispiel #36
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def test_mult_multiplication():
	assert mult.parse("a{2,3}") * one == mult.parse("a{2,3}")
	assert mult.parse("a{2,3}") * multiplier.parse("{4,5}") == mult.parse("a{8,15}")
	assert mult.parse("a{2,}") * multiplier.parse("{2,}") == mult.parse("a{4,}")
Beispiel #37
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def test_charclass_multiplication():
	assert charclass("a") * one == charclass("a")
	assert charclass("a") * multiplier.parse("{1,3}") == mult.parse("a{1,3}")
	assert charclass("a") * multiplier.parse("{4,}") == mult.parse("a{4,}")
Beispiel #38
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def test_obvious_reduction():
	assert mult.parse("(a|b)*").reduce() == mult.parse("[ab]*")
Beispiel #39
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def test_mult_dock():
	assert mult.parse("a{4,5}").dock(mult.parse("a{3}")) == mult.parse("a{1,2}")
Beispiel #40
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def test_mult_intersection():
	assert mult.parse("a") & mult.parse("b?") == charclass()
	assert mult.parse("a") & mult.parse("b?") == nothing
	assert mult.parse("a") & mult.parse("a?") == charclass.parse("a")
	assert mult.parse("a{2}") & mult.parse("a{2,}") == mult.parse("a{2}")
	assert mult.parse("a") & mult.parse("b") == charclass.parse("[]")
	assert mult.parse("a") & mult.parse("a") == charclass.parse("a")
	assert mult.parse("a*") & mult.parse("a") == charclass.parse("a")
	assert mult.parse("a*") & mult.parse("b*") == conc.parse("")
	assert mult.parse("a*") & mult.parse("a+") == mult.parse("a+")
	assert mult.parse("a{2}") & mult.parse("a{4}") == charclass.parse("[]")
	assert mult.parse("a{3,}") & mult.parse("a{3,}") == mult.parse("a{3,}")
Beispiel #41
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def test_pattern_reduce_basic():
	assert pattern.parse("ab|cd").reduce() == pattern.parse("ab|cd")
	assert pattern.parse("a{2}b{2}").reduce() == conc.parse("a{2}b{2}")
	assert pattern.parse("a{2}").reduce() == mult.parse("a{2}")
	assert pattern.parse("a").reduce() == charclass.parse("a")
Beispiel #42
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def test_pattern_multiplication():
	assert pattern.parse("ab?|ba?") * multiplier.parse("{2,3}") == mult.parse("(ab?|ba?){2,3}")
Beispiel #43
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def test_pattern_multiplication():
	assert pattern.parse("ab?|ba?") * multiplier.parse("{2,3}") == mult.parse("(ab?|ba?){2,3}")
Beispiel #44
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def test_obvious_reduction():
	assert mult.parse("(a|b)*").reduce() == mult.parse("[ab]*")
Beispiel #45
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def test_even_star_bug():
	# Defect: (a{2})* should NOT reduce to a*
	a2 = mult.parse("a{2}")
	a2star = a2 * star
	assert a2star == mult.parse("(a{2})*")
Beispiel #46
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def test_epsilon_reduction():
	assert parse("|(ab)*|def").reduce() == pattern.parse("(ab)*|def")
	assert parse("|(ab)+|def").reduce() == pattern.parse("(ab)*|def")
	assert parse("|.+").reduce() == mult.parse(".*")
	assert parse("|a+|b+").reduce() in {pattern.parse("a+|b*"), pattern.parse("a*|b+")}
Beispiel #47
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def test_mult_squoosh():
	# sequence squooshing of mults within a conc
	assert conc.parse("[0-9a-fA-F][0-9a-fA-F][0-9a-fA-F]").reduce() == mult.parse("[0-9A-Fa-f]{3}")
	assert conc.parse("[$%\\^]?[$%\\^]").reduce() == mult.parse("[$%\\^]{1,2}")
	assert conc.parse("(|(|(|(|(|(|[$%\^])[$%\^])[$%\^])[$%\^])[$%\^])[$%\^])[$%\^][$%\^]").reduce() == mult.parse("[$%\^]{2,8}")
Beispiel #48
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def test_derive():
	assert parse("a+").derive("a") == mult.parse("a*")
	assert parse("a+|b+").derive("a") == mult.parse("a*")
	assert parse("abc|ade").derive("a") == pattern.parse("bc|de")
	assert parse("abc|ade").derive("ab") == charclass.parse("c")
def test_concatenation():

	# empty conc + empty conc
	assert conc.parse("") + conc.parse("") == conc.parse("")

	# charclass + charclass
	# a + b = ab
	assert charclass.parse("a") + charclass.parse("b") == conc.parse("ab")
	# a + a = a{2}
	assert (charclass.parse("a") + charclass.parse("a")).reduce() == mult.parse("a{2}")

	# charclass + mult
	# a + a = a{2}
	assert (charclass.parse("a") + mult.parse("a")).reduce() == mult.parse("a{2}")
	# a + a{2,} = a{3,}
	assert (charclass.parse("a") + mult.parse("a{2,}")).reduce() == mult.parse("a{3,}")
	# a + a{,8} = a{1,9}
	assert (charclass.parse("a") + mult.parse("a{0,8}")).reduce() == mult.parse("a{1,9}")
	# a + b{,8} = ab{,8}
	assert charclass.parse("a") + mult.parse("b{0,8}") == conc.parse("ab{0,8}")

	# mult + charclass
	# b + b = b{2}
	assert (mult.parse("b") + charclass.parse("b")).reduce() == mult.parse("b{2}")
	# b* + b = b+
	assert (mult.parse("b*") + charclass.parse("b")).reduce() == mult.parse("b+")
	 # b{,8} + b = b{1,9}
	assert (mult.parse("b{0,8}") + charclass.parse("b")).reduce() == mult.parse("b{1,9}")
	# b{,8} + c = b{,8}c
	assert mult.parse("b{0,8}") + charclass.parse("c") == conc.parse("b{0,8}c")

	# charclass + conc
	# a + nothing = a
	assert (charclass.parse("a") + conc.parse("")).reduce() == charclass.parse("a")
	# a + bc = abc
	assert charclass.parse("a") + conc.parse("bc") == conc.parse("abc")
	# a + ab = a{2}b
	assert (charclass.parse("a") + conc.parse("ab")).reduce() == conc.parse("a{2}b")

	# conc + charclass
	# nothing + a = a
	assert (conc.parse("") + charclass.parse("a")).reduce() == charclass.parse("a")
	# ab + c = abc
	assert conc.parse("ab") + charclass.parse("c") == conc.parse("abc")
	# ab + b = ab{2}
	assert (conc.parse("ab") + charclass.parse("b")).reduce() == conc.parse("ab{2}")

	# pattern + charclass
	# (a|bd) + c = (a|bd)c
	assert pattern.parse("a|bd") + charclass.parse("c") == conc.parse("(a|bd)c")
	# (ac{2}|bc+) + c = (ac|bc*)c{2}
	assert (pattern.parse("ac{2}|bc+") + charclass.parse("c")).reduce() == conc.parse("(ac|bc*)c{2}")

	# charclass + pattern
	# a + (b|cd) = a(b|cd)
	assert charclass.parse("a") + pattern.parse("b|cd") == conc.parse("a(b|cd)")
	# a + (a{2}b|a+c) = a{2}(ab|a*c)
	assert (charclass.parse("a") + pattern.parse("(a{2}b|a+c)")).reduce() == conc.parse("a{2}(ab|a*c)")

	# mult + mult
	# a{3,4} + b? = a{3,4}b?
	assert mult.parse("a{3,4}") + mult.parse("b?") == conc.parse("a{3,4}b?")
	# a* + a{2} = a{2,}
	assert (mult.parse("a*") + mult.parse("a{2}")).reduce() == mult.parse("a{2,}")

	# mult + conc
	# a{2} + bc = a{2}bc
	assert mult.parse("a{2}") + conc.parse("bc") == conc.parse("a{2}bc")
	# a? + ab = a{1,2}b
	assert (mult.parse("a?") + conc.parse("ab")).reduce() == conc.parse("a{1,2}b")

	# conc + mult
	# ab + c* = abc*
	assert conc.parse("ab") + mult.parse("c*") == conc.parse("abc*")
	# ab + b* = ab+
	assert (conc.parse("ab") + mult.parse("b*")).reduce() == conc.parse("ab+")

	# mult + pattern
	# a{2,3} + (b|cd) = a{2,3}(b|cd)
	assert mult.parse("a{2,3}") + pattern.parse("b|cd") == conc.parse("a{2,3}(b|cd)")
	# a{2,3} + (a{2}b|a+c) = a{3,4}(ab|a*c)
	assert (mult.parse("a{2,3}") + pattern.parse("a{2}b|a+c")).reduce() == conc.parse("a{3,4}(ab|a*c)")

	# pattern + mult
	# (b|cd) + a{2,3} = (b|cd)a{2,3}
	assert pattern.parse("b|cd") + mult.parse("a{2,3}") == conc.parse("(b|cd)a{2,3}")
	# (ba{2}|ca+) + a{2,3} = (ba|ca*)a{3,4}
	assert (pattern.parse("ba{2}|ca+") + mult.parse("a{2,3}")).reduce() == conc.parse("(ba|ca*)a{3,4}")

	# conc + conc
	# ab + cd = abcd
	assert conc.parse("ab") + conc.parse("cd") == conc.parse("abcd")
	# ab + bc = ab{2}c
	assert (conc.parse("ab") + conc.parse("bc")).reduce() == conc.parse("ab{2}c")

	# conc + pattern
	# za{2,3} + (b|cd) = za{2,3}(b|cd)
	assert conc.parse("za{2,3}") + pattern.parse("b|cd") == conc.parse("za{2,3}(b|cd)")
	# za{2,3} + (a{2}b|a+c) = za{3,4}(ab|a*c)
	assert (conc.parse("za{2,3}") + pattern.parse("a{2}b|a+c")).reduce() == conc.parse("za{3,4}(ab|a*c)")

	# pattern + conc
	# (b|cd) + za{2,3} = (b|cd)za{2,3}
	assert pattern.parse("b|cd") + conc.parse("za{2,3}") == conc.parse("(b|cd)za{2,3}")
	# (ba{2}|ca+) + a{2,3}z = (ba|ca*)a{3,4}z
	assert (pattern.parse("ba{2}|ca+") + conc.parse("a{2,3}z")).reduce() == conc.parse("(ba|ca*)a{3,4}z")

	# pattern + pattern
	# (a|bc) + (c|de) = (a|bc)(c|de)
	assert pattern.parse("a|bc") + pattern.parse("c|de") == conc.parse("(a|bc)(c|de)")
	# (a|bc) + (a|bc) = (a|bc){2}
	assert (pattern.parse("a|bc") + pattern.parse("a|bc")).reduce() == mult.parse("(a|bc){2}")
Beispiel #50
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def test_two_or_more_qm_bug():
	assert mult.parse("a{2,}") * qm == mult.parse("(a{2,})?")
Beispiel #51
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def test_pattern_reduce_basic():
	assert pattern.parse("ab|cd").reduce() == pattern.parse("ab|cd")
	assert pattern.parse("a{2}b{2}").reduce() == conc.parse("a{2}b{2}")
	assert pattern.parse("a{2}").reduce() == mult.parse("a{2}")
	assert pattern.parse("a").reduce() == charclass.parse("a")
def test_empty_pattern_suppression():
	assert mult.parse("[]?").reduce() == conc.parse("")
	assert mult(pattern(), qm).reduce() == conc.parse("")
Beispiel #53
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def test_two_two_bug():
	assert mult.parse("a{2}") * multiplier.parse("{2}") == mult.parse("a{4}")
Beispiel #54
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def test_mult_intersection():
	assert mult.parse("a") & mult.parse("b?") == charclass()
	assert mult.parse("a") & mult.parse("b?") == nothing
	assert mult.parse("a") & mult.parse("a?") == charclass.parse("a")
	assert mult.parse("a{2}") & mult.parse("a{2,}") == mult.parse("a{2}")
	assert mult.parse("a") & mult.parse("b") == charclass.parse("[]")
	assert mult.parse("a") & mult.parse("a") == charclass.parse("a")
	assert mult.parse("a*") & mult.parse("a") == charclass.parse("a")
	assert mult.parse("a*") & mult.parse("b*") == conc.parse("")
	assert mult.parse("a*") & mult.parse("a+") == mult.parse("a+")
	assert mult.parse("a{2}") & mult.parse("a{4}") == charclass.parse("[]")
	assert mult.parse("a{3,}") & mult.parse("a{3,}") == mult.parse("a{3,}")
Beispiel #55
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def test_epsilon_reduction():
	assert parse("|(ab)*|def").reduce() == pattern.parse("(ab)*|def")
	assert parse("|(ab)+|def").reduce() == pattern.parse("(ab)*|def")
	assert parse("|.+").reduce() == mult.parse(".*")
	assert parse("|a+|b+").reduce() in {pattern.parse("a+|b*"), pattern.parse("a*|b+")}
Beispiel #56
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def test_mult_dock():
	assert mult.parse("a{4,5}").dock(mult.parse("a{3}")) == mult.parse("a{1,2}")
Beispiel #57
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def test_mult_common():
	assert mult.parse("a{3,4}").common(mult.parse("a{2,5}")) == mult.parse("a{2,3}")
	assert mult.parse("a{2,}").common(mult.parse("a{1,5}")) == mult.parse("a{1,5}")
	assert mult.parse("a{3,}").common(mult.parse("a{2,}")) == mult.parse("a{2,}")